Direct variation equation is y = kx ; k is the constant of variation.
y = -9
x = -45
-9 = k(-45)
-9/-45 = k
1/5 = k
y = 1/5x CHOICE A.
Step-by-step explanation:


0.25 Is the rate and x is how many minutes
3 multiplied by 5 is 15 times 2 is 30 that should be ur answer
Answer: $(d-3c)
Step-by-step explanation:
Total amount Tina had = $d
Cost of cupcakes = $c
Number of cupcakes purchased = 3
Therefore,
Total cost of cupcakes = cost per cupcake × number of cupcakes
Total cost of cupcakes = $c × 3 = $3c
Amount left after cupcake purchase:
Total amount Tina had - total cost of cupcakes :
$d - $3c
Answer: 0.271
Step-by-step explanation:
Probability of complement of an even is 1 decreased by the probability of the event
P(At least one) =1 - P(none)
The probability that of testing negative is 0.9 because the probability of testing positive is 0.1
P( at least one) = 1 - P(none) = 1 - (0.93^3) = 0.271