Answer:
-128/147 cm/min
Step-by-step explanation:
[tex]A=\frac{1}{2}bh \\ \\ 90=\frac{1}{2}(10.5)b \\ \\ b=\frac{120}{7} \\ \\ \\ A=\frac{1}{2} bh \\ \\ \implies \frac{dA}{dt}=\frac{b}{2} \frac{dh}{dt}+\frac{h}{2} \frac{db}{dt} \\ \\ 4=\frac{21}{4}+\frac{db}{dt}+\frac{60}{7} \\ \\ \frac{db}{dt}=-\frac{128}{147}[/tex]
What is the best approximation of the solution to the system to the nearest integer values?
A (3, 4)
B (2, 3)
C (1, 3)
D (3, 2)
Answer:
B (2, 3)
The two lines intersect near that point.
Use the Law of Syllogism to draw a conclusion from the two given statements.
If a number is a multiple of 64,then it is a multiple of 8.
If a number is a multiple of 8, then it is a multiple of 2.
Answer:
C. is your answer nwow.
Step-by-step explanation:
a14. What are the lengths of b and c? Write your answer to the nearest tenth of a metre, where appropriate. b 5m 3 m-k3 m
Solution:
As you can see in the diagram, there are two triangles. We will separate the two triangles into the smaller and the bigger one.
For the smaller triangle:
Now we will use the Pythagorean Theorem. The theorem states that the square of the longest side is equal to the sum of the squares of the two other sides.
To solve for the value of b, we will have:
[tex]\begin{gathered} 5^2=3^2+b^2 \\ b^2=5^2-3^2 \\ b=\sqrt[]{5^2-3^2} \\ b=\sqrt[]{25-9} \\ b=\sqrt[]{16} \\ b=4 \end{gathered}[/tex]For the bigger triangle:
We will also use the pythagorean theorem to find the value of c and by using the value of b we got from the smaller triangle.
[tex]\begin{gathered} c^2=b^2+6^2 \\ c^2=4^2+6^2 \\ c=\sqrt[]{4^2+6^2} \\ c=\sqrt[]{16+36} \\ c=\sqrt[]{52} \\ c=2\sqrt[]{13} \\ c=7.211102551 \end{gathered}[/tex]ANSWER:
b = 4 cm
c = 7.2 cm
Which of the linear equations represents the graphed line?
Responses
A y = 32x + 1y = 3 2 x + 1
B y = −23x + 1y = − 2 3 x + 1
C y = −32x + 1y = − 3 2 x + 1
D y = 23x + 1
The linear equations of the graph are y = 2/3x + 1. Option D.
Solution:
Let's find the slope of the graph using the coordinates (0, 1) (-3, -1)
m = y₂ - y₁ / x₂ - x₁
m = -1 - 1 / -3 - 0
m = -2/-3
m = 2/3
Using the slope-intercept form,
y = MX + c
where
m = slope
c = y-intercept(This is when x = 0)
Therefore,
c = 1
Finally, the equation will be y = 2/3 x + 1.
An equation is a mathematical statement consisting of two expressions joined by an equal sign. The ID applies to all values of the variable. Constraint expressions apply only to specific values of variables. A mathematical expression that expresses the relationship between two terms on either side of a letter.
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How many solutions does this equation have?
–8y + 1 = –8y
Answer:
-8 + 1 = -8
+8 +8
1 = 0
no solution
If point (x, y) is reflected over the line y = x, the resulting point is (y,x).TrueFalse
When we reflect a point over y = x, the x and y coordinates become swapped and switch places, that is why (x,y) results to (y,x).
Therefore, the answer is true.
LaDawn needed wire for her Halloween wreath. How many 1/4 inch pieces can be cut from a piece of wire that is 5/8 inches long?
The length of each piece of wire is 2.5 inches.
What are fractions?Fractions are used to depict the components of a whole or group of items. Two components make up a fraction. The numerator is the number that appears at the top of the line. It specifies how many identically sized pieces of the entire event or collection were collected. The denominator is the quantity listed below the line. The total number of identical objects in a collection or the total number of equal sections that the whole is divided into are both displayed. A fraction can be expressed in one of three different ways: as a fraction, a percentage, or a decimal. The first and most popular way to express a fraction is in the form of the letter ab. Here, a and b are referred to as the numerator and denominator, respectively.
Let the number of pieces = x
The length of the wire = 5/8 inches
The length of one piece of wire = 1/4 inch
According to the question,
1/4 x = 5/8
So, x = 5/8 × 4
x = 20/ 8
x = 5/2
x = 2.5 inch
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Set up a proportion and soive for
side TV (y):
ATUV-AXWV
As we Know that, ΔTUV[tex]\sim[/tex] ΔXWV
So, for the given proportion TV(y) = 21.
What is Proportion?
A proportion is an equation that sets two ratios at the same value. For instance, you could express the ratio as follows: 1: 3 if there is 1 boy and 3 girls (for every one boy there are 3 girls) There are 1 in 4 boys and 3 in 4 girls. 0.25 are male (by dividing 1 by 4)
What is Ratio?
The link between two or more things in terms of quantity, amount, or size.
Given that,
ΔTUV[tex]\sim[/tex] ΔXWV
∠T = ∠X
∠U = ∠W
∠TUV = ∠XWV
So, TU/WX = TV/WV
10/10 = TV/21
1 = TV/21
TV = 21
So, for the given proportion the value for the side TV(y) = 21
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A regular pentagon is inscribed in a circle as shown. 1. Find the measure of minor arc cut off by one of the diagonals.2. Find the length of the same minor arc in problem 16a, given the radius of the circle is 10 cm. Leave the answer is terms of pi.
SOLUTION:
Step 1:
we are to find the measure of minor arc cut off by one of the diagonals;
The sum of interior angles in a pentagon is:
[tex]\begin{gathered} (n-2)\text{ x 180} \\ (5-2)\text{ x 180} \\ 3\text{ x 180} \\ 540 \end{gathered}[/tex]Each interior angle of a regular pentagon is
[tex]\frac{540}{5}\text{ = 108}[/tex]So the size of the major arc can be gotten by the circle theorem; the angle at the centre is twice the angle at the circumference.
[tex]\text{The major arc = 2 x 108 = 216}[/tex]Then recall,
[tex]\begin{gathered} \text{The major arc + the minor arc = 360 (sum of angles at a point)} \\ 216\text{ + the minor arc = 360} \\ \text{The minor arc = 360 - 216} \\ \text{The minor arc =144} \end{gathered}[/tex]Step 2:
We are to find the length of the same minor arc in problem;
[tex]\frac{\theta}{360}\text{ x 2 }\pi\text{ r}[/tex]Where our angle (titan) is 144 and radius is 10
[tex]\begin{gathered} \frac{144}{360}\text{ x 2 x }\pi\text{ x 10} \\ \\ 8\pi \end{gathered}[/tex]So the length of the minor arc, given that the radius is 10 cm is 8 pi
- 3(x + 7) - 3x - 18 ? Please I really need help because our long-term sub won’t explain it in a way I can understand
Answer:
-6x - 39
Step-by-step explanation:
-3(x + 7) -3x -18 Fist distribute the -3
-3(x) + -3(7) -3x -18 Simplify (a negative times a positive is a negative)
-3x -21 -3x -18 Now combine like terms
-6x -39
In 8 days, the temperature dropped 12 degrees. How many degrees per day did the temperature drop
Answer:
x = 1.5°
Step-by-step explanation:
8 days = 12°
1 day = x
cross-multiply
8x = 12
Divide both sides by the coefficient of x, which is 8
8x/8 = 12/8
x = 1.5°
Hence, 1 day = 1.5°
what Is the difference in low and high temperatures here are the temperatures in the pic!!!
The difference is calculated as:
15°F - ( - 15°F) = 15°F + 15 °F = 30°F
Because 15°f is the highest temperature and -15°F is the lowest temperature
Answer = 30 °F
I AM BEGGING AND PLEADING PLS ANSWER PLSSS YOU WILL BE MY SAVIOUR I AM BEGGING PLEASE READ
Libby wants to draw a scale diagram of the Sun and the Earth.
The diameter of the Sun is 1.4 million km to 2 s.f.
The diameter of the Earth is 13,000 km to 2 s.f.
k to task
Libby decides to draw the Earth with a diameter of 2 cm.
Work out the diameter of the Sun that she needs to draw.
Give your answer in metres to 2 significant figures.
Watch video
The diameter of the Sun that she needs to draw, considering the scale, is of:
2.15 m.
What is a scale?The meaning of the scale of a drawing is how much each unit in the drawing represents in actual distance.
In this problem, the actual diameters are given as follows:
Sun: 1,400,000 km.Earth: 13,000 km.The drawn diameters are given as follows:
Sun: x cm.Earth: 2 cm.From the scale of the earth, the number of km represented with each cm is given as follows:
13000/2 = 6500 km represented by each cm.
(division of the actual distance by the scale).
Hence the number of cm that is needed to represent 1,400,000 km is of:
1400000/6500 = 215 cm.
(division of the total distance by the scale).
Each cm is composed by 100, the diameter of the Sun in meters is of:
215/100 = 2.15 m.
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What is the value of x in the equation 3/2(4x - 1) – 3x = 5/4-(x + 2)? Pick one below. 1. 1/16 2. 3/16 3. 19/164. 3X= ???
The equation is given as
[tex]\frac{3(4x-1)}{2}-3x=\frac{5}{4}-(x+2)[/tex][tex]\begin{gathered} \frac{3(4x-1)-2\ast3x}{2}=\frac{5-4\ast(x+2)}{4} \\ \frac{3(4x-1)-6x}{2}=\frac{5-4x-8}{4} \\ \frac{12x-3-6x}{1}=\frac{-3-4x}{2} \\ (6x-3)=\frac{-3-4x}{2} \\ (6x-3)\ast2=-3-4x \\ 12x-6=-3-4x \\ 12x+4x=-3+6 \\ 16x=3 \\ x=\frac{3}{16} \end{gathered}[/tex]The value of x is 3/16.
The total number of participants who went on the seventh-grade field trip to the Pink Palace consisted of all of the seventh-grade students and 13 adult chaperones. Four-ninth of the total participants rode a large bus, and the rest rode a smaller bus. If 156 people rode the larger bus, how many students went on the field trip?
338 students went on the field trip.
Given:
Four-ninth of the total participants rode a large bus, and the rest rode a smaller bus.
156 people rode the larger bus.
Let x be the total participants.
4/9 x = 156
multiply by 9 on both sides
4*9/9 x = 156*9
4x = 156*9
4x = 1404
divide by 4 on both sides
4x/4 = 1404/4
x = 1404/4
x = 351.
number of students = total participants - adult chaperones.
= 351 -13
= 338 students
Therefore 338 students went on the field trip.
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HELP DUE RIGHT NOWW!:((
The correct option will be C that is x+y=15 and 7x+12y=145 as the system of equation defines, "A group of equations involving one or more variables is known as a system of equations. The variable mappings that satisfy each component equation, or the points where all of these equations intersect, are the solutions to systems of equations".
What is system of equation?A group of equations involving one or more variables is known as a system of equations. The variable mappings that satisfy each component equation, or the points where all of these equations intersect, are the solutions to systems of equations. In order for one term to have equal and opposite coefficients in the two equations, multiply one or both equations by an integer. The equations are combined to form a single equation with a single variable. Do the variable's solution. Reintroduce the variable into the equation and then find the value of the other variable. Systems of linear equations in two variables can be solved in one of three ways: by graphing; by the substitution method; or by the elimination method.
Here,
Let x be the plate of 7 inch and y be the plate of 12 inch.
x+y=15
The total of diameter for both the plate is 145 inches.
7x+12y=145
The right option is C, which has the values x+y=15 and 7x+12y=145. according to the equations' definition, "A system of equations is a collection of equations involving one or more variables. Systems of equations have solutions that are either the variable mappings that satisfy each component equation or the locations where all of these equations intersect ".
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Choć kulig hjchkxhkcgiciUPDATE to QUESTION
Student will kill the app and refuse to turn back to ongoing session
Session is in session history
Even though it's not finished yet
Student sees updates to Answer
But to see updates to Question he needs to kill the app
1/3(x+18)= 7 sole for x
In this case, we'll have to carry out several steps to find the solution.
Step 01:
Data
1/3(x+18)= 7
x = ?
Step 02:
We must apply the algebraic rules to find the solution.
[tex]\begin{gathered} \frac{1}{3}\cdot(x+18)=7 \\ x\text{ + 18 = 3}\cdot7 \\ x=21-18\text{ = 3} \end{gathered}[/tex]The answer is:
x = 3
√20 - 2√5solve with using adding and subtracting radicals
the initial expression is:
[tex]\sqrt[]{20}-2\cdot\sqrt[]{5}[/tex]so to rest them we want to have the same radical so we can rewrite the root of 20 so:
[tex]\begin{gathered} \sqrt[]{4\cdot5}-2\cdot\sqrt[]{5} \\ 2\cdot\sqrt[]{5}-2\cdot\sqrt[]{5}=0 \end{gathered}[/tex]Sketch the graph of y= sin x° for 0≤x≤360
Answer:
Step-by-step explanation:
This is a sketch graph of y= sin x° for 0 ≤ x ≤360.
It is called as Sine curve. A mathematical curve described in terms of the sine trigonometric function, of which it is the graph, is known as a sine wave, sinusoidal wave, or simply sinusoid. It is a smooth periodic function and a particular kind of continuous wave.
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15. Which of the following relations defines y as a function of x?
Remember that
The data set is a function if every element of the domain corresponds to exactly one element of the range
so
Verify each option
I ------> is a function (every element of the domain corresponds to exactly one element of the range)
II -----> is not a function (every element of the domain does not correspond to exactly one element of the range)
III ---> is a function (every element of the domain corresponds to exactly one element of the range)
IV ----> is not a function (every element of the domain does not correspond to exactly one element of the range)
therefore
The answer is
Both I and III define a y as function of xA local water park found that if the price of admission was $19, the attendance was about 1550 customers per week. When the price of admission was dropped to $16,attendance increased to about 2350 per week. Write a linear equation for the attendance in terms of the price,p. (A = mp + b)
Given:
When the price of admission was $19, the attendance was about 1550 customers per week
And, when the price of admission was dropped to $16,
attendance increased to about 2350 per week
Let the attendance = A
And the price = p
The linear equation will be A = mp + b
Where (m) is the slope and (b) is the y-intercept
So,
When p = 19, A = 1550
When p = 16, A = 2350
So,
[tex]m=\frac{2350-1550}{16-19}=\frac{800}{-3}=-\frac{800}{3}[/tex]So,
[tex]A=-\frac{800}{3}p+b[/tex]we will find the value of (b) as follows:
[tex]\begin{gathered} 1550=-\frac{800}{3}\cdot19+b \\ 1550=-\frac{15200}{3}+b \\ b=\frac{19850}{3} \end{gathered}[/tex]So, the answer will be the linear equation is:
[tex]A=\frac{-800}{3}p+\frac{19850}{3}[/tex]Can someone help? :)
The slope of the given line is [tex]-\frac{3}{5}[/tex]
What is slope of a line?
Slope of a line is the tangent of the angle which the line makes with the positive direction of x axis
If [tex]\theta[/tex] is the angle which the line makes with the positive direction of x axis, then slope of the line is given by
m = [tex]tan\theta[/tex]
If the line passes through [tex](x_1, y_1)[/tex] and [tex](x_2, y_2)[/tex]
slope = [tex]\frac{y_2-y_1}{x_2 - x_1}[/tex]
The given line passes through ( -1, -5) and (4, -8)
Slope of the line =
[tex]\frac{-8-(-5)}{4-(-1)}\\-\frac{3}{5}\\\\[/tex]
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What values of c and d would make
the following expression represent a real number?
i(2 + 3i)(c + di)
c = 2, d = 3
c = –2, d = 3
c = 3, d = –2
c = –3, d = –2
The values of c and d that would make that the given expression represent a real number are c = –3, d = –2.
What is meant by the term real number?In mathematics, a real number is a quantity that may be articulated as just an infinite decimal expansion. In comparison to the natural numbers 1, 2, 3,..., which are derived from counting, real numbers are employed in measurements of varying different quantities including such size and time.For the given question;
The expression is given as;
= i(2 + 3i)(c + di)
Simplify the expression;
= i(2c + 2di + 3ci + 3di²)
= 2ci + 2di² + 2ci² + 3di³
= (2c - 3d)i - 2d - 3c
In order is for expression to yield a real number, the coefficient of must now be zero.
Check the values from option;
2c - 3d = 2 x 2 - 3x 3 = -5
2c - 3d = 2 x -2 - 3 x -3 = -13
2c - 3d = 2 x 3 + 3 x -2 = -1
2c - 3d = 2 x -3 -3 x - 2 = 0
Thus, the correct values for the expression to becomes real number is
c = –3, d = –2.
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I really need help with this
Mean for the girls is 137.6% of the mean for the boys.
What is Mean?
Suppose, there is a data and the average of the data has to be calculated. Mean is used to find the average of the data.
Mean is calculated by dividing the sum of all observations by the number of observations.
Here,
Let the midpoint be denoted by x and number of boys be denoted by f
[tex]\Sigma fx = 10 \times 18 + 30\times 9 + 50\times 7 + 70 \times 6\\[/tex]
[tex]= 1220[/tex]
[tex]\Sigma f = 40[/tex]
Mean for boys = [tex]\frac{1220}{40}[/tex]
= 30.5
Let mean for the girls be x % of the mean of boys
By the problem,
[tex]\frac{x}{100}\times 30.5 = 48.8\\x = \frac{48.8 \times 100}{35.5}\\[/tex]
x =137.46%
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Write 280,000,000 in scientific notation.
0.28 × 109
28 × 108
2.8 × 108
2.8 × 109
Answer:
= 4.875 × 105
(scientific notation)
= 4.875e5
(scientific e notation)
= 487.5 × 103
(engineering notation)
(thousand; prefix kilo- (k))
Of a sample of 500 students surveyed, 300 students say they listen to music when they study. In a school with 1500 students, how many students would be likely to listen to music while studying? hi 300 students 500 students 900 students 1200 students
Given:
Surveyed Sample = 500 students
Number of students who listen to music = 300
The probability of students that listens to music is given by the formula:
[tex]pr\text{ =}\frac{number\text{ of students that listen to music}}{Total\text{ number of student}}\text{ =}\frac{300}{500}[/tex][tex]pr\text{ = }\frac{3}{5}[/tex]In a sample of 1500 students, to find the probable number of students that will listen to music
we will multiply the probability we obtained initially by the sample space
=>
[tex]\begin{gathered} \frac{3}{5}\text{ x 1500} \\ \\ \frac{4500}{5} \\ \\ =900 \end{gathered}[/tex]It is likely that 900 students will listen to music while studying
2)
B
34°
C
A) similar; AA similarity
B) not similar
C) similar; SSS and SAS similarity
D) similar; SAS similarity
34°
Answer:
a
Step-by-step explanation:
Jasper opened a savings account and deposited 200.00 the account earns 9%interest compounded annually if he wants to use the money to buy a new bicycle in 2 years how much will he able to spend on the bike
The formula for calculating the amount of money after compounding for a period of time is expressed as;
A = P(1+r/n)^nt
P is the principal (amount deposited)
r is the rate
t is the time
n is the time of compounding
Given
P = 200.00
r = 9% = 0.09
t = 2 years
n = 1 year
Substitute the given parameters into the formula
A = 200(1+0.09/1)^1(2)
A = 200(1.09)^2
A = 200(1.1881)
A = 237.62
Hence he will be able to spend 237.62 on the bike
Graph each system and determine the number of solutions that it has. If there is no solution, type NS. Ifit has a solution, state it. When entering solutions, enter them as a coordinate pair. Do not includespaces in answers.3x +y = -33x +y = 3Number of Solutions:Solution:
we have the system
3x +y = -3
3x +y = 3
In this problem we have two different parallel lines
Remember that the solution of the system is the intersection point both lines
In this problem the lines don't intersect (are parallel)
therefore
the system has no solution NS
isolate the variable y in the first equation
y=-3x-3 -----> equation 1
isolate the variable y in the second equation
y=-3x+3 -----> equation 2
Solve the system of equations
equate equation 1 and equation 2
-3x-3=-3x+3
solve for x
-3x+3x=3+3
0=6 ------> is not true
that means
the system has no solution (NS)