What would the vaule of y be when x=-2

=1

The value of y varies directly with x, and y=1 when x=2.

Step-by-step explanation:

Formula for direct variation is y=kx, where k represents the constant. So, we solve for "k" first given the "x" and "y" variables.

Read "y varies directly as x" when y=2, x=10:

2 = k(10)

2  = k(10)

10      10

1

5  = k  

Now that you found "k" you can substitute that into equation with the other given variables:

y = (1/5)(-25)= -5

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this

312312

step-by-step explanation: