Let's solve this problem step-by-step:
Let's set:
[tex]-2x + 2y = 6 -- equation 1\\7x+4y=23 -- equation 2[/tex]
(equation1) * 2
[tex]-4x+4y=12--equation3[/tex]
(equation 2) - (equation 3)
[tex]11x = 35\\x= \frac{11}{11}--equation4\\x=1[/tex]
Plug (equation4)'s value of 'x' into (equation1)
[tex]-2(1} )+2y=6\\-2+2y =6 \\2y = 6+2 =8 \\y =4[/tex]
Thus x= 1 and y = 4
Let's check:
[tex]-2(1 )+2(4)=6\\2 +4 =6\\6=6\\ \\7(1)+4(4) )=23\\7+16=23\\ 23 =23\\[/tex]
Answer: x = 1 and y= 4
Hope that helps!
Here is an expression: 4•3^x
a. Evaluate the expression when x = 2
b. Evaluate the expression when x = 4.
Answer:
First one is 36 and second one is 324!!!
Please answer quick in test!
Answer:
The first one
Step-by-step explanation:
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The cost of 8 kg of butter is $ 904. what will be the cost of 14 kg of butter
Answer:
$1582
Step-by-step explanation:
cost of each kg 904/8=113
cost of 14 kg 113x14=1582
the cost of 14 kg of butter is $1582
Identifique el valor atípico en la siguiente lista. Luego encuentre la media y la mediana de la lista con y sin el valor atípico 10, 4, 20, 5, 11, ISo, 7 de millas Atípico- 10 Media con valor atípico - 29,6 Mediana con valor atípico- 10 Media sin valor atípico - 44,1 Mediana sin valor atípico - 10,5 b. Valor atípico -10 Media con valor atípico - 10 Mediana con valor atípico - 29,6 Media sin valor atípico - 8,5 Mediana sin valor atípico 9.5 a Valor atípico - 1SO SN Media con valor atípico -9,5 Mediana con valor atípico 8,5 Media sin valor límite 29,6 Mediana sin valor atípico - 10 d Valor atípico - Media ISO con valor atípico -29,6 Mediana con valor atípico 10 Media sin valor atípico - 9,5 Mediana sin valor atípico - 8,5
What is a quadratic function that has zeros of x=-1 and x=-2?
Write in factored form.
Answer:
f(x) = (x + 1)(x + 2)
Step-by-step explanation:
Zero x = -1 corresponds to factor x + 1, and zero x = -2 to x + 2. Thus, the quadratic in question is
f(x) = (x + 1)(x + 2)
Please help!
The illustration below shows the graph of y as a function of x.
Complete the following sentences based on the graph of the function.
- As x increases, y _______ (increases/decreases).
- The rate of change for y as a function of x is not __________ (constant/constant), therefore the function is ________ (linear/nonlinear).
- For all values of x, the function value y ___ (≤/≥/=) 0.
- The y-intercept of the graph is the function value y = ____.
- When x = 1, the function value y = ___.
Answer:
As "x" increases "y" *decreases*
y as a function of x is not *constant*
Therefore the function is *nonlinear*
For all values of x, the function value y *≥* 0.
The y intercept of the graph is *8*
x=1 function value of y is *5*
What is the recursive rule for the endangered turtles?
Answer:
they have to be protected, people have to work harder to protect them, and their habitats. The image below might help. (I hope this helps sorry if not!)
The recursive rule for the endangered turtle is to create critical habitats that would ensure their survival.
What does it mean for the turtles to be endangered?This means that based on the threatening activities of humans in their habitats, they are about to become extinct.
To prevent this from happening, the Endangered Species Act (ESA) has created habitats that are vital to the conservation of the animal.
Read more on endangered animals here:
https://brainly.com/question/740101
I'll give u brainliest if u answer it
Answer:
i think its A
Step-by-step explanation:
But if i am incorrect i apologize
please help i dont understand
Given:
Number of spheres = 2
Number of prisms = 3
Number of pyramids = 5
To find:
The probability that a pyramid will be selected.
Solution:
We have,
Favorable outcomes = Number of pyramids
= 5
Total outcomes = Total number of figures
= [tex]2+3+5[/tex]
= [tex]10[/tex]
Now, the required probability is:
[tex]\text{Probability}=\dfrac{\text{Favorable outcomes}}{\text{Total outcomes}}[/tex]
[tex]\text{Probability}=\dfrac{5}{10}[/tex]
[tex]\text{Probability}=0.5[/tex]
Therefore, the probability that a pyramid will be selected is 0.5.
45 is what percent of 60
Answer:
75%
Step-by-step explanation:
[tex]\frac{x}{100} = \frac{45}{60}[/tex]
45 x 100 = 4,500
4,500 divided by 60 = 75
If it costs $80,000 to put on an event and the total revenue is $250,000, what is the profit as a percentage of revenue? (Round to the nearest percent.)
The graph of y = 3*:
this is the answer. this should help
What is 20% of 900 ?
Answer:
180
Step-by-step explanation:
900/ 10= 90x 2= 180
haha very bad explaination but hope it helps <3
Answer:
180
Step-by-step explanation:
First let's write the problem out.
20% of 900 = 20%*900
20% can also be written out as .2
now all you need do is multiply .2 by 900
This should get you 180
answer to –1.7+5.2(5.5+–10.8a)
Answer:
26.9 - 56.16a
Step-by-step explanation:
-1.7 + 5.2(5.5 - 10.8a)
use the distributive property
-1.7 + 28.6 - 56.16a
combine like terms
-1.7 + 28.6 = 26.9
26.9 - 56.16a
plz mark as brianliest if correct!!!
PLEASE PLEASE PLEASEEEE HELP
Step-by-step explanation:
Volume
= 1/3 * π* r² * h
= 1/3 * 3.14 * 5² * 5
= 1/3 * 3.14 * 25 * 5
= 130.83 units ³
Hope it will help :)❤
Answer:
V = 130.83
Step-by-step explanation:
The equation for the volume of a cone is:
[tex]V =\frac{ \pi r^2h}{3}[/tex]
we can see that r = 5, and h = 5
we will use 3.14 for the value of pi
so, we just fill in the equation with the values we know and solve :)
[tex]V=\frac{\pi r^2h}{3} \\V=\frac{(3.14) (5)^2(5)}{3}\\V=\frac{(3.14) (25)(5)}{3} \\V=\frac{392.5}{3} \\V= 130.8333 (approx.)[/tex]
the question wants the nearest hundred, so the final answer is
V = 130.83
as a ratio in simplest form, 33.5% is express as
Answer:
335/1000
Step-by-step explanation:
33.5% is .335 so 335/1000 is 33.5%
A zoo has 60 penguins total if the emperor penguins make up 35% of all the penguins at the zoo how many emperor penguins are at the zoo?
Answer:
21 emperor penguins
Step-by-step explanation:
1. Convert 35% to decimal form
0.35
2. Multiply 0.35 by 60
21
3. The answer is 21
Jan rode to her friend's house with a constant speed of 14 m/hr. How long will she take to
travel the 15 miles there?
Answer:
1.07 hours
Step-by-step explanation:
14 miles = 1 hour
15 miles = x hours
Equal these two together
14 mi/1hr = 15 mi/xhr
Cross multiply
14 mi × x hr = 1 hr × 15 mi
I will stop using the units for now so it won't be as confusing
14x = 15
Divide both sides by 14 to isolate the variable
14x ÷ 14 = 15 ÷ 14
x = 1.07... hours
your friends show you a coin collection .in it 45/50 of the coins are quarters.what percent of the coins are quarter
Answer:
90%
Step-by-step explanation:
45 : 50
45 / 50 = 0.9
0.9 x 100 = 90
Answer: 20%
Step-by-step explanation: i learned this in mexico class
Tomás bought a book that cost $18. It was on sale for 84% of its original price. How much did Tomás pay?
Answer:
I dont know lol
Step-by-step explanation:
I
dont
know
lol
Answer: $15.12
Step-by-step explanation:
You just need to find 84% of 18 which is 15.12. what you do is you convert the percent into 0.84 and multiply is by the original price which is 18.
84%=0.84
0.84 times 18 = 15.12
:)
4x - 3y = -3
4x + y=17
The solution is....
The graphs of f(x) and g(x) are shown below.
For what interval is the value of (f - g)(x) negative?
O (-*infinity sign*,-1)
O (-*infinity sign*, 2)
O (0, 3)
O (2, *infinity sign*)
Answer:
The second one
Step-by-step explanation:
Graph the function f(x)=x^2+4x- 12 on the coordinate plane. (do a, b and c)(explain or show how you know the answer.) (graph down below.)
a) What are the x-intercepts?
(b) What is the y-intercept?
(c) What is the maximum or minimum value?
9514 1404 393
Answer:
a) {-6, 2}
b) -12
c) minimum: -16
Step-by-step explanation:
I find a graphing calculator to be a big help. Its graph is attached.
__
a) The function can be factored as ...
f(x) = (x -2)(x +6)
The factors are zero at the x-intercepts: x = 2, x = -6.
__
b) The y-intercept is the function value when x=0. That is the constant in the function. The y-intercept is -12.
__
c) The leading coefficient of the function is positive, so its graph opens upward. The extreme value is a minimum. It is found on the axis of symmetry, at the x-value that is halfway between the x-intercepts: x = (2-6)/2 = -2. The function value there is ...
f(-2) = (-2-2)(-2+6) = -4(4) = -16
The minimum is f(-2) = -16.
Answer:
I took the test.
A (6, -2)
b (-12)
c Minimum -16
Step-by-step explanation:
I’m not quite sure what they mean by this so can someone provide the answer AND the step by step solution.
Answer:
first just choose a team, and then they will ask you questions, try to go for red
Step-by-step explanation:
HELP PLEASE!! Alita is 2 times as old as Jiro. Jiro is 4 years younger than Erik. Erik is 1/3 as old as dawn. The sum of all their ages is 72 What equation could you write to represent this situtation????
Step-by-step explanation:
72= (e= 1/3d ) + (j= e-4) + (a= 2j)
or
1/3d - 4 × 2 =72
let d = dawn
let e = erik
let j = jiro
let a = alita
remember that a number next to a variable means multiplication.
The equation could write to represent this situation is
72= (e= 1/3d ) + (j= e-4) + (a= 2j)
What is equation?An equation can be defined as a statement that supports the equality of two expressions joined by the equal sign "=". For example, 2x – 5 = 13. These are the expressions 2x – 5 and 13.The sign connecting these two expressions is "=".
In algebra, an equation is a condition of a variable. It will be filled only with the value specified by the variable. This means that the equation 2x – 5 = 13 is satisfied only when x = 9.
Equations are different, for example:
Linear equations Quadratic equations Cubic equations Quartic equations Differential equations Parametric equationsLet us suppose ,
age of Erik is e
dawn is d
Jiro is j
Alita is a
The equation could write to represent this situation is
72= (e= 1/3d ) + (j= e-4) + (a= 2j)
To learn more about equation, refer;
https://brainly.com/question/10413253
#SPJ2
how many rectangles with an area of 10 square feet can fit within a large rectangle with dimensions 25 feet by 40 feet?
Answer:
100 small rectangles
Step-by-step explanation:
Number of small rectangles = Area of large rectangle ÷ area of small rectangle
[tex]= \frac{25*40}{10}\\\\= 25*4\\= 100[/tex]
PLEASE HELP
7x-3= -24 what is x and how do you find it?
Answer:
x = -3
Step-by-step explanation:
7x - 3 = -24 (Given)
7x - 3 + 3 = -24 + 3 (Added 3 on both sides by using the addition property of equality)
7x = -21 (Simplified)
7x/7 = -21/7 (Divided 7 on both sides by using the division property of equality)
x = -3 (Simplified)
Therefore, x = -3.
Answer:
x= -3
Step-by-step explanation:
You do the opposite.
So,
-24 +3
= -21
-21/ 7
= -3
Therefore, the answer is -3
plz help, i would really appriciate it :)
Answer: [tex]x^{2} +12x+20[/tex]
Step-by-step explanation:
h(x)= (x+10)(x+2)
^ It is this way because it is so the x value will equal -10 and -2.
Now, we just distribute it. if the question does not have any points it passes through described in the problem, then it is pretty self explanatory.
x^2 + 2x+ 10x+ 20
= [tex]x^{2} +12x+20[/tex]
Answer:
f(x) = A(x - 2)(x - 10),
where A is real and A= 20.
Step-by-step explanation:
if I'm wrong I am so very sorry
How much inches go into 5ft?
Select the right answer?
Answer:
opposite sides are parallel
Answer:
Option A.) All 4 sides are congruent.Step-by-step explanation:
Because this chapter is related to Rhombus.