Evaluate -4(a+b)-10a/b when a=8 and b=5 can someone help me with the break down of the problem not the answer just want to know how to work the problem.

Question

hero · Answer

Directly substitute the values of a and b into the expression, then evaluate the expression.

anonymous · Answer

but how do I evaluate the problem after not sure what I'm evaluating

anonymous · Answer

alright well u distribute the -4 to the parenthesis, and you put the numbers they give you in the place of a and b

hero · Answer

I assume you have:

$$-4(a + b) - 10\frac{a}{b}$$

Or is it this:
$$-4(a + b) - \frac{10a}{b}$$

hero · Answer

They're both the same anyway, so in either case, plugging in the given values for $a$ and $b$ produces:

$$-4(8 + 5) - 10\left(\frac{8}{5}\right)$$

All you have to do now is evaluate the expression.

anonymous · Answer

-4( a+b)-10 a/b when a=8 and b=5 that's how it's made out on my worksheet

hero · Answer

So of the expressions I posted above, which one represents what's on your worksheet? To be honest, it doesn't matter because they are both the same.

anonymous · Answer

$$-4(8+5)-10\left( \frac{ 8 }{ 5 } \right)$$

anonymous · Answer

thanks @Hero

hero · Answer

Did you computer the correct answer? If so, what is it?

anonymous · Answer

-68
am I right?

hero · Answer

-4(a + b) -10(a/b)  = -4(8 + 5) - 10(8/5) 
                             = -(4(13) + 80/5)
                             = -(52 + 16)
                             = -(68)
                             = -68

anonymous · Answer

thank u :)

hero · Answer

yw