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lilavasa [31]
2 years ago
7

Help solve #12 plz ​

Mathematics
1 answer:
nexus9112 [7]2 years ago
8 0

Answer:

<h3>          The second:   f(-5) = 2</h3>

Step-by-step explanation:

x = -5

-5 < -4  and if x<-4 then  f(x) = - 2x - 8

so:

    f(-5) = - 2(-5) - 8 = 10 - 8 = 2

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(3x + 5)(3x – 6)<br> 18x – 6<br> 9x² – 3x - 30<br> 9x? 334 – 30<br> 6x - 1
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2 years ago
Write the slope-intercept form of an equation that passes
Hunter-Best [27]

Answer:

y = \frac{4}{3}x-5

Step-by-step explanation:

As the line is perpendicular to y=-\frac{3}{4} x + 2, we know that the slope of the line is \frac{4}{3}. As it passes through (3, - 1), we know that it should be y = \frac{4}{3}x-5.

4 0
2 years ago
The area of a rectanglular sandbox is (5x + 40) feet. Factor 5x + 40 to find possible dimensions of the sandbox
kotegsom [21]
5x+40 factors to 5(x+8). Notice how distributing the 5 back through to each term in the parenthesis gives
5 times x = 5x
5 times 8 = 40
So 5*(x+8) = 5*x+5*8 = 5x+40

Therefore, the factors are 5 and (x+8).
The dimensions of the sandbox are 5 feet by (x+8) feet.

We don't know the numeric value of (x+8) since we don't know the value of x, so we leave it as is. 
6 0
3 years ago
The measurement of a pressure valve starts at 36 psi and falls to 30 psi. What is the approximate percent decrease in the readin
lukranit [14]

Answer:the answer is a 17psi

Step-by-step explanation:

6 0
3 years ago
Problem:
andreyandreev [35.5K]
5(n-4)=(4n-12)

First: Distribute 5 into n and -4.
5(n-4)=(5n)+(5*-4)= 5n-20.

Second: Subtract 4n from both sides to eliminate the variable from the right side of the equation.

(5n-20)=(4n-12)

n-20=-12

Next: Add 20 to both sides to eliminate the constant from the left side of the equation.

n-20=-12

n=8

The unknown number is 8.
3 0
3 years ago
Read 2 more answers
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