Question

What is the value of 1/2 x3 + 3.4y when x = 4 and y = 2? (4 points) 12.8 14.8 25.8 38.8

Answer 1

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

Answer 2

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

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!