Answer:
y = 112
Step-by-step explanation:
If y varies directly as the square of x
mathematically;
y ∝ x²
y = kx² where 'k' is the constant of proportionality
let u know the value of k for this equation by making k the subject of the formular from y = kx²
divide both sides by x²
k = y / x²
given that y = 567 x = 9
k = 567/(9)²
k = 567/81
k = 7
now to get the value of y when x = 4
from the equation conneting x, y,
y = kx²
y = 7 × (4)²
y = 7 × 16
y = 112
Answer:
2500
Step-by-step explanation:
there you go haha
Answer: (6,13)
Work:
- set them equal to each other
2x + 1 = 1/2x + 10
- multiply both sides by 2 to get rid of fraction
4x + 2 = x + 20
- solve for x and you get x = 6
- plug in to solve for y
2(6) + 1 = y
13 = y
Step-by-step explanation:
7(x + 6) = 42
<em>distributive property</em><em>: a(b + c) = ab + ac</em>
(7)(x) + (7)(6) = 42
7x + 42 = 42
<em>subtraction property of equality</em><em> (subtract 42 from both sides)</em>
7x + 42 - 42 = 42 - 42
7x = 0
<em>division property of equality </em><em> (divide both sides by 7)</em>
7x : 7 = 0 : 7
x = 0
