Answer: Option D) 6
Solution:
xy=k
What is the constant of variation: k=?
when x=-3 and y=-2
Replacing the knwon values in the given equation:
xy=k; x=-3, y=-2
(-3)(-2)=k
Multiplying the values:
6=k
k=6
Answer:
big
Step-by-step explanation:
pp energy
F(x)= 33+.10x. Since its 10 cents per minute, x would represent the number of minutes Tom uses.
Answer:
(- 1, 4 ) and (2, 7 )
Step-by-step explanation:
Given the 2 equations
y = x² + 3 → (1)
y = x + 5 → (2)
Substitute y = x² + 3 into (2)
x² + 3 = x + 5 ← subtract x + 5 from both sides
x² - x - 2 = 0 ← in standard form
(x - 2)(x + 1) = 0 ← in factored form
Equate each factor to zero and solve for x
x - 2 = 0 ⇒ x = 2
x + 1 = 0 ⇒ x = - 1
Substitute these values into (2) for corresponding values of y
x = 2 : y = 2 + 5 = 7 ⇒ (2, 7 )
x = - 1 : y = - 1 + 5 = 4 ⇒ (- 1, 4 )
Answer:
173.25
173.25+7=
$180.25
Step-by-step explanation:
