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Vanyuwa [196]
2 years ago
10

A function is shown below.

Mathematics
1 answer:
alexandr402 [8]2 years ago
3 0

Answer:

the answer is 4

Step-by-step explanation:

if y=21 the we substitute in the main equation

21=8x-11

8x=32

x=4

You might be interested in
Four less than nine times a number is one hundred twenty-two. Find the original number.
Tasya [4]

Answer:

The number is 14

Step-by-step explanation:

Denote the original number by z. The expression "Four less than nine times a number is one hundred twenty-two" can be rewritten in an equation.

Our number is z, then the left hand side of the equation is 9z-4.

The right side of the equation is 122. Then the complete equation is 9z-4=122. Add 4 in both sides to get 9z=122+4=126. Now, divide by 9 in both sides to get z=\frac{126}{9}=14

3 0
2 years ago
To finish a project, you need to paint the lateral surfaces of a cube with side length 2.5 inches. Find the area that you need t
valentina_108 [34]

Answer:

25 in^2

Step-by-step explanation:

We want to find the lateral surface area of the cube.

The lateral surface area of a cube is given as:

A = 4a^2

where a = length of side of the cube

Therefore, given that the length of the side of the cube is 2.5 inches, the area you need to paint is:

A = 4 * 2.5^2\\A = 25 in^2

6 0
3 years ago
THIS IS WORTH 50 POINTS I will mark you as the brainlyest only if you graph this on a GRAPH. Graph this on a GRAPH y= 1/3x+3 .
jenyasd209 [6]
I hope this helps. Keep in mind the 1/3 is slope and the 3 is y-intercept.

3 0
3 years ago
Read 2 more answers
4c^2-8c-1=0 complete the square round to nearest hundredth
olga55 [171]
Move constant to other side
add 1
4c^2-8c=1
divide by 4 to make leading coeficient 1
c^2-2c=1/4
take 1/2 of linear coeficient and square it
-2/2=-1, (-1)^2=1
add that to both sides
c^2-2c+1=1/4+1
factor perfect squaer and add
(c-1)^2=5/4
square root both sides
c-1=+/-(√5)/2
add 1
c=1+/-(√5)/2

c=2.12 or -0.12
8 0
3 years ago
What's 149 rounded to the nearest tenth
alexandr1967 [171]
150 because you round the 4 because the number in the ones place is over 5.
3 0
3 years ago
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