plumagirl
30.12.2020 •
Mathematics
HELP PLS ASAP I WILL GIVE 50 points and brainliest PLS
The variable z varies jointly with x and y. Also, z = -75 when x = 3 and y = -5.
What equation describes this variation?
z = kxy
What is the constant of variation?
k =
Solved
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Ответ:
Step-by-step explanation:
z = kxy, where k is a real constant.
We have z = -75, x = 3, y = -5.
(-75) = k(3)(-5)
-75 = -15k
k = 5.
Ответ:
a pocket knife?
Step-by-step explanation: