3 years ago

If y is 7 when x is 3.5 and y varies directly with x, find y when x is 12.

1 answer:

3 0

So to find y, we have to set this into fractions and cross multiply.
so, remember y/x
7/3.5=y/12
12*7=3.5y
solve for y
84/3.5=y
y=24

You might be interested in

gogolik [260]

Answer:

Step-by-step explanation:

i dont know

7 0

3 years ago

coldgirl [10]

Answer:

Step-by-step explanation:

k(x)=5 says I'm 5 no matter the value of x...

So therefore

k(-4)=5

k(56)=5

k(66378)=5

k(whatever)=5

k(x) is constantly 5 for whatever input x.

4 0

3 years ago

slavikrds [6]

Answer:

C = 10(pi) yards

A = 25(pi) yards

Step-by-step explanation:

6 0

3 years ago

ikadub [295]

Each day it decrease $2. So just multiply $2 x 4 days. It changed a total of $8.

7 0

4 years ago

Romashka-Z-Leto [24]

2x=y
x+y=21
x+2x=21
3x=21
x=7
y=2x
y=14

3 0

3 years ago