Xvaries directly as y. if x is 9 when y is 4, find x when-y is 8.
a) write the variation.
b) find x when y is 8.
a) how are these two variables related?
i oo
od. x=ky
b) the quantity indicated is

see explanation

Step-by-step explanation:

Given x varies directly as y then the equation relating them is

x = ky ← k is the constant of variation

To find k use the condition x = 9 when y = 4

k = = = 2.25

x = 2.25y ← equation of variation

When y = 8, then

x = 2.25 × 8 = 18

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt

345

step-by-step explanation: