exam Maths Puzzle Numerical Ability

This is not from a textbook. How would you solve and graph the following:

Elaine raises only free-range chickens and turkeys. She wants to raise no more than 65 animals with no

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exam Other Question
Which equation is the image of y=3^x under the mapping rule (x,y)--(1/2x-1,2y+3)?
a)1/2(y-3)=3^(2x+1)
b)1/2(y-3)=3^1/2(x+1)
c)1/2(y-3)=3^2(x+1)
d)2(y-3)=3^2(x+1) How can i slove 3(y+9)-3y?