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2 years ago

Z varies jointly with x, and y, and z=7 when x= 2, y= 2 pleasee I need an answer now!!

Mathematics

2 answers:

Elina [12.6K]2 years ago

5 0

Answer:

(7/4)(2)(2)=7

Step-by-step explanation:

Sergio [31]2 years ago

5 0

Answer:

z = 1.75xy

Step-by-step explanation:

Given z varies jointly as x and y then the equation relating them is

z = kxy ← k is the constant of variation

To find k use the condition z = 7 when x = 2 and y = 2, then

7 = k × 2 × 2 = 4k ( divide both sides by 4 )

1.75 = k

z = 1.75xy ← equation of variation

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