F(x) =-5x+9
f(x) =-5(15)+9
f(x) =- 75+9
f(x)=-66
your answer is -66 :)
Answer:
20
step by step explanation:
Answer:
y = 8
Step-by-step explanation:
Given that y is directly proportional to x² then the equation relating them is
y = kx² ← k is the constant of variation
To find k use the condition y = 2 when x = 3, then
2 = k × 3² = 9k ( divide both sides by 9 )
= k
y =
x² ← equation of proportion
When x = 6, then
y =
× 6² =
× 36 = 2 × 4 = 8
Answer:
x=3/2, y=10. (3/2, 10).
Step-by-step explanation:
2x-y=-7
4x-y=-4
--------------
-2(2x-y)=-2(-7)
4x-y=-4
---------------------
-4x+2y=14
4x-y=-4
-----------------
y=10
2x-10=-7
2x=-7+10
2x=3
x=3/2
Answer: 11
Step-by-step explanation:
4(x + -5) = 24 ==> 4(x + -5)/4 = 24/4
x - 5 = 6 ==>. (x - 5) + 5 = 6 + 5
x = 11