Only solve number 21

Mathematics

1 answer:

pantera1 [17]2 years ago

4 0

5-7+15-(-1) -2+15+1 -2+15 =13 13+1 Answer is 14

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F(-4)=8 and f(-1)=4 write the linear equation

kobusy [5.1K]

$f(-4)=8\to(-4,\ 8)\\\\f(-1)=4\to(-1,\ 4)$

The point-slope formula of a line:

$y-y_1=m(x-x_1)\\\\m=\dfrac{y_2-y_1}{x_2-x_1}$

Substitute:

$m=\dfrac{4-8}{-1-(-4)}=\dfrac{-4}{3}=-\dfrac{4}{3}\\\\y-8=-\dfrac{4}{3}(x-(-4))\\\\y-8=-\dfrac{4}{3}x-\dfrac{16}{3}\ \ \ \ |+8\\\\y=-\dfrac{4}{3}x-\dfrac{16}{3}+\dfrac{24}{3}\\\\y=-\dfrac{4}{3}x+\dfrac{8}{3}\ \ \ |\cdot3\\\\3y=-4x+8\ \ \ |+4x\\\\4x+3y=8$

The slope-intercept form: $y=-\dfrac{4}{3}x+\dfrac{8}{3}$

The standard form: $4x+3y=8$

7 0

2 years ago

What is 7/8 x c for c=8

Mademuasel [1]

Answer:
7

Explanation:
We are given the equation:
 $\frac{7}{8}$ * c

We want to get the value of the equation at c = 8.
Therefore, all we have to do is substitute c in the equation with 8 and solve as follows:
 $\frac{7}{8}$ * 8

= $\frac{7*8}{8}$

The 8 in the numerator will be cancelled out with the 8 in the denominator leaving us with only the 7 as a solution

Hope this helps :)

6 0

2 years ago

Read 2 more answers

Solve the equation for the red variable.

yawa3891 [41]

Answer:

d/r

Step-by-step explanation:

d = rt

t = d/r

5 0

2 years ago