Determine if the given ordered pairs are solution of x+ 4y = 7. 1. (3,1)
Solutions:

True

Step-by-step explanation:

3 X 1 = 3

4 X 1 = 4

3 + 4 = 7

Hope this helps!

(3, 1) is a solution

Step-by-step explanation:

If the coordinates are solutions of the equation, you should be able to solve the equation to get the y-value when you input the x-value;

So in the case of (3, 1), input x = 3 and solve for y:
(3) + 4y = 7

4y = 4

y = 1

Solving the equation gives y = 1, which is the same as the given coordinates, hence it is a solution or,  in other words, this point falls on the line graphed by the equation

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

$649.60

step-by-step explanation: