We have the following:
[tex]\begin{gathered} df=n-1 \\ =5-1 \\ df=4 \end{gathered}[/tex]therefore:
[tex]\begin{gathered} ME=t_{critical}\cdot\frac{s}{\sqrt{n}} \\ ME=3\text{.}747\cdot\frac{21.2}{\sqrt{5}} \\ ME=35.52 \end{gathered}[/tex]The margin the error that corresponds to a sample of size of 5 with mean 75.2 and a standard deviation of 21.2 at a confidence level of 98% is 35.52
what is this answer
6p>48
Answer: p is greater than or equal to 8
Step-by-step explanation:
To isolate the variable (p) you divide both sides of the equation by 6 to get p by itself and the answer comes out clean because 48 is a multiple of 6.
Answer:
Divide both sides by the same factor
6p > 48
6p > 48
--- ---
6 > 6
result
p > 8
Simplify 3p²-2q+2p² +17-q?
F p²-3q+17
G 5p²-3q+17
H p²-q+17
J5p²-q+17
Answer: The answer is G 5p²-3q+17
Step-by-step explanation:
can you please help me I need 22 and 23
22. the coordinates are:
[tex]Q(-8,7),R(-7,2),S(-8,13),t(-11,-2)[/tex]So to know if the are parallel or perpendicular we have to calculate the slopes so:
For QR
[tex]m=\frac{2-7}{-7-(-8)}=-\frac{5}{1}=-5[/tex]For ST
[tex]m=\frac{-2-13}{-11-(-8)}=-\frac{15}{3}[/tex]So they are not parallel or perpendicular.
23. the coordinates are:
[tex]Q(-1,4),R(-1,-9),S(11,-2),T(11,6)[/tex]Now the slopes are
For QR
[tex]m=\frac{-9-4}{-1-(-1)}[/tex]This is undefine so is a vertival line
for ST:
[tex]m=\frac{8-(-2)}{11-11}[/tex]Is undefine so is also a vertical line, this means that they are parallel
Please please help me it needs to be in for tomorrow :(
Answer:
[tex]2.44 \times 10^6[/tex]
Step-by-step explanation:
[tex]R=\frac{(3.8 \times 10^5)^2}{5.9 \times 10^4} \\ \\ =\frac{14.44 \times 10^{10}}{5.9 \times 10^4} \\ \\ \approx 2.44 \times 10^6[/tex]
Answer:
I hope it helps .The final answer is 2,447 × 10 to the power of 3
Find the other endpoint of the line segment with the given endpoint and midpoint. Endpoint: (5,-1) Midpoint: (5,-4)
The formula for calculating the midpoint of a line segment is given below
[tex](x,y)=\frac{(x_1+x_2)}{2},\frac{(y_1+y_2)}{2}[/tex]Where the values are
[tex]\begin{gathered} x=5,y=-4 \\ x_1=5,y_1=-1 \end{gathered}[/tex]By substituting the values, we will have
[tex]\begin{gathered} (x,y)=\frac{(x_1+x_2)}{2},\frac{(y_1+y_2)}{2} \\ (5,-4)=\frac{(5_{}+x_2)}{2},\frac{(-1_{}+y_2)}{2} \end{gathered}[/tex]By comparing coefficient, we will have
[tex]\begin{gathered} \frac{(5_{}+x_2)}{2}=5 \\ \frac{(-1_{}+y_2)}{2}=-4 \end{gathered}[/tex]Cross multiply to get the values of x2
[tex]\begin{gathered} \frac{(5_{}+x_2)}{2}=5 \\ 5+x_2=10 \\ \text{substract 5 from both sides} \\ 5-5+x_2=10-5 \\ x_2=5 \end{gathered}[/tex]Cross multiply to get the values of y2
[tex]\begin{gathered} \frac{(-1_{}+y_2)}{2}=-4 \\ -1+y_2=-8 \\ \text{add 1 to both sides} \\ -1+1+y_2=-8+1_{} \\ y_2=-7 \end{gathered}[/tex]Hence,
The coordinate of the other endpoint is ( 5, -7 )
jo buys a pair of boots for £63 in a sale she saves 1/10 of the original price of the boots how much money does she save
Answer:
She saves £6.30
Step-by-step explanation:
You multiply 63 by 1/10 to get 6.30 this is how much she saves
solving inequalities in real life 5. Dennis is selling chocolate bars for a fundraiser, and if he sells over $175 worth of candy, he'll win a prize. If chocolates sell for $2.50 a bar, and Dennis has already sold $40 worth of candy, then how many more bars does he have to sell in order to win a prize? 6. The a roller-cod inches ta grows ab months w coaster?
Start by putting the inequality in the form
[tex]ax+c>d[/tex]in this case c wil be how much he has sold, and d will be how much he needs to sell, and a is the price for the bar.
it would look like this
[tex]2.5x+40>175[/tex]solve it like a regular equation
[tex]\begin{gathered} 2.5x>175-40 \\ 2.5x>135 \\ x>\frac{134}{2.5} \\ x>54 \end{gathered}[/tex]He will have to sell over 54 bars to win the prize.
150 is 15% of what number?
If 150 is the 15%, to find which number is the 100% we use the rule of 3
[tex]\begin{gathered} x\to100 \\ 150\to15 \end{gathered}[/tex]and the rule say that:
[tex]\begin{gathered} x=\frac{100\times150}{15} \\ x=1000 \end{gathered}[/tex]The equation for line j can be written as y= 1/8 x+7. Parallel to line j is line k, which passes through the point ( – 3, – 1). What is the equation of line k?
Answer:
please help I need thos answer too
Step-by-step explanation:
I wish I knew the answer to this I have 20 mins to be dont and I've already spend 10 on this question
6 Given: TY XY, ZTVY = ZXWY Prove: ATVY = AXWY Statements Reasons 1. TY ~ XY 1. Given 2. Given 2. LTVY & LXWY 3. 3. 4. 4. 5. 5. OTVY Z OXWY Gina wison All Things Aige
Statement 3:
[tex]TV\cong XW[/tex]Reason: Law of cosines
Statement 4:
[tex]VY\cong WY[/tex]Reason: Law of cosines
Proof
We have the following situation:
Because the law of cosines,
[tex]\begin{gathered} a^2=c^2+d^2-2cd\cos (b) \\ a^2=e^2+f^2-2ef\cos (b) \end{gathered}[/tex]Therefore,
[tex]c^2+d^2-2cd\cos (b)=e^2+f^2-2ef\cos (b)[/tex]Find the solution to the equation by substitution
13x-5y=-8
y=3x
Answer:
x=4
y=12
Step-by-step explanation:
replace y in the first equation since we already know what y is equal to
13x-5y=-8
13x-5(3x)=-8
13x-15x=-8
-2x=-8
/-2. /-2
x=4
Now fill in X to find y
y=3(4)
y=12
Hopes this helps please mark brainliest
−2×(−6)=?[tex]−2×(−6)=?[/tex]
When -2 is multiplied by (-6) the result is 12
What is multiplication?One of the four fundamental mathematical operations, along with addition, subtraction, and division, is multiplication.
Multiply in mathematics refers to the continual addition of sets of identical size.
When negative signs multiply each other the result is a positive sign also when positive signs multiply each other the result is a positive sign
However, when the signs are not same the result is always negative
In the given problem, the signs are same like negative 2 and negative 6
hence the result is a positive sign
and the quantity 2 multiply the quantity 6 gives 12
therefore -2 * -6 = 12
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HELP ME PLEASE TYYYYY
Answer:
66
Step-by-step explanation:
The ratio of guinea pigs to the total number of animals is 5:11.
So, there are (30)(11/5)=66 animals in all.
Which comparison is true?
A. 0.680 > 0.68
B. 0.74 = 0.740
C. 0.51 < 0.510
D. 0.990 < 0.99
Answer:
The answer is B
Solve the following proportion
X/2 = 8/9
A line has a slope of
9 and includes points (9,d) and (8,3). What is the value of d?
The value of 'd' will be;
⇒ d = 12
What is Equation of line?
The equation of line in point-slope form passing through the points (x₁ , y₁) and (x₂, y₂) with slope m is defined as;
⇒ y - y₁ = m (x - x₁)
Where, m = (y₂ - y₁) / (x₂ - x₁)
Given that;
A line has a slope of 9 and includes points (9, d) and (8, 3).
Now,
We know that,
Slope of line (m) = (y₂ - y₁) / (x₂ - x₁)
⇒ m = (3 - d) / (8 - 9)
⇒ 9 = (3 - d) / (-1)
⇒ - 9 = 3 - d
⇒ d = 3 + 9
⇒ d = 12
Thus, The value of 'd' will be;
⇒ d = 12
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Find the coefficient of the term x^5 in 2x^5+5x^4-9x+5
Solution:
Given:
[tex]2x^5+5x^4-9x+5[/tex]A coefficient is a number multiplied by a variable.
Hence,
[tex]The\text{ coefficient of }x^5\text{ is 2}[/tex]Therefore, the coefficient is 2.
Write an explicit formula for a_na
nthe n^{\text{th}}n
th
term of the sequence 8, 4, 2, ...8,4,2,....
The explicit formula of the sequence is aₙ = 8(1/2)ⁿ
How to determine the explicit formula of the sequence?From the question, we have the following sequence that can be used in our computation:
8, 4, 2
In the above sequence, we can see that the previous term is divided by 2 get the current term
using the above as a guide,
so, we have the following representation
aₙ = aₙ₋₁/2
When represented explicitly, we have
aₙ = a * rⁿ
So, we have
aₙ = 8 * (1/2)ⁿ
Evaluate the products
aₙ = 8(1/2)ⁿ
Hence, the explicit formula is aₙ = 8(1/2)ⁿ
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Directions: Solve each system of equations algebraically. Verify the solution using the graph of the system. 1. y=-x-4 y=3.x y 5
y=-x-4 (a)
y=3x (b)
Put (b) into (a) and solve for x:
3x=-x-4
3x+x = -4
4x= -4
Divide both sides by 4
4x/4 = -4/4
x= -1
Replace the value of x on any equation:
y=3x = 3(-1) = -3
Solution : (-1,-3)
Graph:
Mia has 50$ on a gift card to her favorite coffee shop. Each time she visits the coffee shop sh spends $3.75 on her favorite drink. Write an equation to represent the relationship between n, the number of times she visits the coffee shop, and b, the total balance on her gift card.
Answer:
50.00-3.75n = b
Step-by-step explanation:
50.00 is the beginning balance she has on the gift card.
If she spends 3.75 every visit, and n represents the number of visits, then 3.75n will tell you how much she has spent with each visit.
1 visit: 50.00 - 3.75(1) = 46.25
2 visits: 50.00 - 3.75(2) = 42.50
3 visits: 50.00 - 3.75(3) = 38.75
Ronan and Kelsey each think of a number.
2 less than Ronan's number is equal to 4
lots of Kelsey's number.
3 lots of Ronan's number added to Kelsey's
number is 97.
Using the information above, write and
solve two simultaneous equations to work
out Ronan and Kelsey's numbers.
The 2 equations which can be used to solve the given situations of the numbers are:
x - 2 = 4x3x + x = 97What are equations?A mathematical equation is a formula that uses the equals sign to represent the equality of two expressions. A mathematical statement that has an "equal to" symbol between two expressions with equal values is called an equation. As in 3x + 5 Equals 15, for instance. Equations come in a variety of forms, including linear, quadratic, cubic, and others. The point-slope form, standard form, and slope-intercept form are the three main types of linear equations.So, the equations that can be formed are:
Let, Ronan's number be 'x' and '4x' be Kelsey's number.
(1) x - 2 = 4xNow, solve as follows:
4x - x = -23x = -2x = -2/3Ronan's number be: -2/3
Kelsey's number be: 4 × 2/3 = -8/3
Let, let, Kelsey's number be 'x' and Ronan's number be '3x'.
(2) 3x + x = 97Now, solve as follows:
4x = 97x = 97/4x = 24.25Ronan's number be: 72.75
Kelsey's number be: 24.25
Therefore, the 2 equations which can be used to solve the given situations of the numbers are:
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7. Write the equation of the parabola. Pay close attention to the scale on both axes.
We can start with the equation of the parabola in vertex form, as we know the coordinates of the vector:
[tex]y=a(x-h)^2+k[/tex]The vertex is (h,k) = (-5,2), so we get:
[tex]y=a(x-(-5))^2+2=a(x+5)^2+2[/tex]We can use another known point, as (-6,4) to calculate the parameter a:
[tex]\begin{gathered} y=a(x+5)^2+2 \\ 4=a(-6+5)^2+2 \\ 4=a\cdot(-1)^2+2 \\ 4=a+2 \\ a=4-2 \\ a=2 \end{gathered}[/tex]Now that we have no more unknown parameters, we can expland the equation to the standard form:
[tex]\begin{gathered} y=2(x+5)^2+2=2(x^2+10x+25)+2=2x^2+20x+50+2 \\ y=2x^2+20x+52 \end{gathered}[/tex]The equation is y=2x^2+20x+52.
PLEASE ANSWER I NEED THIS FOR A UNIT TEST AND I DON'T WANT TO FAIL
we will have to follow given below steps if we want to plot this inequality x is less than or equal to 2.6.
What is linear inequality and examples?A linear inequality is formed by any two real numbers or any two algebraic expressions marked by the symbols "," ">," "," or "." Ones of numerical inequality include 911 and 18>17, while algebraic examples include x+7>y, y10-x, and x y > 11
How do you identify a linear inequality?One of the inequality symbols is present in a linear inequality:. It displays non-equal data in graph style. With the inequality sign in place of the equality sign, a linear inequality appears exactly like a linear equation.
The values of x that satisfy the inequality must be determined before we may graph the inequality x = 2.6 on a number line. This can be done by changing x to a variety of values and observing which ones cause the inequality to hold true. When x is less than or equal to 2.6, we know that the inequality x = 2.6 is true. This means that the inequality will be satisfied for any value of x that is lower than or equal to 2.6. This has a range of inclusive values from -infinity to 2.6. We can use a dotted line spanning from negative infinity to 2.6 to graph the inequality on a number line. We would insert a dot for each number between negative infinity and 2.6, including 2.6 itself, since the dots on the line denote the numbers in the range. The dots on the line represent the integers in the range, which spans from negative infinity to 2.6. (i.e., all numbers less than or equal to 2.6). The open circle at 3 shows that the number is outside of the range, while the solid point at 2.6 indicates that the number is within the range.
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Aliyah left the airport and traveled home at an average speed of 40 km/h.
Shanice left at the same time and traveled in the opposite direction with an
average speed of 60 km/h. How long does Shanice need to travel before they are
300 km apart?
Answer:
3 hoursStep-by-step explanation:
When moving in opposite directions from the same point the speeds add up.
Total speed:
60 + 40 = 100 km/h
Distance is 300 km, find the time.
time = distance / speedt = 300/100t = 3 hoursAnswer:
Time = 3 hours
Step-by-step explanation:
The total speed is,
→ 40 km/h + 60 km/h
→ 100 km/h
Formula we use,
→ v = d/t
Then the time taken will be,
→ v = d/t
→ 100 = 300/t
→ 100 × t = 300
→ t = 300/100
→ [ t = 3 ]
Hence, answer is 3 hours.
40 students participated in track. This was 5% of the students at the school. How many students attend the school?
Answer: 800 students
If there are 40 students who participated and that's 5% of the entire school. 100% of the entire school would be 800.
Given: TU II XW
Prove: XW=8
Statements Reasons
TWIIXW Given
UTV=XYV alternate angles theorem
TVU= vertical angles theorem
TVU~WVX AA
? ?
XW\14=4/7substitution property of equality
7(XW)=56 cross product
XW=8 division property of equality
Which step is missing?
A.
Statement: WX/UT=UZ/VW Reason: Corresponding sides of similar triangles are proportional.
B.
Statement :XW/UT=VW/XV Reason: Corresponding sides of similar triangles are proportional.
C.
Statement: XW/UT=VW/XV Reason: Corresponding sides of similar triangles are proportional.
D.
Statement: XW/UT=UV/XV Reason: Corresponding sides of similar triangles are proportional.
The missing step is XW/UT=VW/XV because corresponding side of similar triangle are proportional.
What is similar triangle?
Similar triangles are the triangles that have corresponding sides in proportion to each other and corresponding angles equal to each other. Similar triangles look the same but the sizes can be different.
When two triangles are similar, then their corresponding angles would be congruent while their opposite sides will be proportional to each other
In the proof, it is given, Both triangle are similar, by AA similarity theorem, hence, XW/UT=VW/XV because corresponding side of similar triangle are proportional.
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In California, we need more rain to sustain the health of our natural environment, argriculture, andeconomic. A group of statistics students in Oxnard College recorded the amount of rain during2016-2017 school year, measuring the intensity by the inches of rain, and the results were:Inches of Rain123456Frequency332334The mean rain intensity, , isinches.Please show your answer to 1 decimal place.The median rain intensity isinches.The rain intensity mode isinches.Please separate your answers by','in bimodal situation. Enter DNE if there is no mode.CalculatorScratchwork Area
Given data:
1. The mean rain intensity
[tex]\bar{x}=\frac{\sum fx}{\sum f}=\frac{66}{18}=3.7\text{ inches}[/tex]2. The median rain intensity,
[tex]\begin{gathered} \text{Median = (}\frac{\text{N+1}}{2})th \\ =(\frac{18+1}{2})th=(\frac{19}{2})th=9.5th\text{ term} \\ \text{The 9.5th term from the frequency table is }4 \\ \text{The median is 4} \end{gathered}[/tex]3. The rain intensity mode (intensity with the highest frequency)
[tex]6[/tex]Therefore,
The mean : 3.7
The median : 4
The mode: 6
(Solving quadratic equations) Hello, I need help with just 3 questions. Thanks :)
Answer:
Check the pic i attached
Ross is saving up to buy a new car. he has been saving for 12 months and so far he has $3,200.in another 12 months, he expects to have $8,000.how much is ross saving each month during his 2nd year saving?
Answer:
$400
Step-by-step explanation:
For the first 12 months, he saved
3200/12
= $266.7 each month
In another 12 months,
= $3,200 + x = $8000
(Use x as the unknown total money)
= 8000 - 3200
= 4,800
So, in another 12 months, his total savings will be $4,800
For each month,
= 4,800/12
= $400
i have three number cards. the median is 4. if the range is 3, whats the missing number?
The missing number in those three card are 5 and 2 when the median is 4 and the range is 3.
Median:
Median refers the middle value of the given set of numbers.
Given,
i have three number cards. the median is 4.
Here we need to find the missing number when the range is 3.
Let us consider x and y be the missing number.
We know that, the range is difference of smallest and largest number,
So, we can write it as,
x - y = 3
Now, we know that the median is the middle value
Then it can be written as,
y, 4, x
The smallest possible values of y is 1, 2, and 3
Similarly, the possible values of x is 5, 6, 7
But based on the value of range we have only take the values, 5 and 2.
Because that one is satisfies the condition of range.
Therefore, the missing numbers are 5 and 2.
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