High School

What is the value of [tex]\frac{1}{2}x^3 + 3.4y[/tex] when [tex]x = 4[/tex] and [tex]y = 2[/tex]?

A. 12.8
B. 14.8
C. 25.8
D. 38.8

Answer :

Answer:

I know the answer! I got 100 on my quiz for it! It is 38.8!!!!!!!

Step-by-step explanation:

So what we know:

x = 4

y = s

Alright so, the exponent x^3 evaluates to 64. 64 divided by 2 = 32. 3.4 x 2 = 6.8. Aaaaand, 32 + 6.8 = 38.8! There ya go! :3 Hope this helps a bunch!

First you need to substitute the values
Equation: 1/2(4)(3) + 3.4(2)
So the easy way to do this is take half of 4 to make 2 which multiplied by 3 is 6.
3.4 doubled is 6.8 so when you do 6.8 + 6
Your answer is 12