The question is in this link (please fast):

a) 190

b)-189

Step-by-step explanation:

4a)

-2y+7(4+8y)=

-2y+(7·4)+(7·8y)=

-2y+28+(7·8y)=

-2y+28+(7·24)

-2y+28+168=

-6+28+168=

22+168 solve

4b)

-5w-4(6t+5)

-5w-4(36+5)

-5w-(4·41)

-5w-164

-25-164 solve

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50

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