3 years ago

50 POINTS!! EASY!

Mathematics

2 answers:

ioda3 years ago

5 0

Answer:

-16 & 40

Step-by-step explanation:

When x = 8

y = -2 × 8

y = -16

When y = -20

x = -2 × -20

x = 40

frosja888 [35]3 years ago

3 0

9514 1404 393

Answer:

y = -16
x = 10

Step-by-step explanation:

The direct proportion equation is ...

y = kx

where k is the constant of proportionality. Here, you're told k=-2, so the equation is ...

y = -2x

For x=8, the value of y is ...

y = -2(8) = -16 . . . . . do the multiplication

For y = -20, the value of x is ...

-20 = -2x

10 = x . . . . . . . . . divide both sides by -2

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ANSWER

$80 {ms}^{ - 1}$

EXPLANATION

The average velocity of the ball is the rateof displacement over the total time.

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