Answer:
15x^2 - 12x^3
Step-by-step explanation:
A rectangular block has 3 parts that play into its volume. length, width and height. The question gives us length and width in the form of x and 3x, so height is what's missing.
It gives us a bit more information saying the sum of its edges is 20. We also have to ask how many lengths, widths and heights are there. That may be a bit hard to understand, but is you are looking at a block I could ask how many edges are vertical, just going up and down. These would be the heights. There are 4 total, and this goes the same for length and width, so 4*length + 4*width and 4*height = 20.
Taking that and plugging in x for length and 3x for width (or you could do it the other way around, it doesn't matter, you get:
4*x + 4*3x + 4*height = 20
4x + 12x + 4h = 20
16x + 4h = 20
4h = 20 - 16x
h = 5 - 4x
Now we have h in terms of x, which lets us easily find the volume just knowing x. To find the volume of a rectangular block you just multiply the length, width and height.
x*3x*(5-4x)
3x^2(5-4x)
15x^2 - 12x^3
Question doesn't give a specific value for x at all so you should be done there. Any number you plug in for x should get you the right answer
Answer: $531.51
Step-by-step explanation:
Initial balance of 500
If he made deposits into his account that means he added to his existing balance so his new balance would be the initial 500 plus all the deposits:
500 + 100 + 250 + 300 = 1150
so after the deposits he has a new balance of 1150. He then withdrew money which means he's subtracting from his balance so his new balance will be his current balance minus all the withdraws:
1150 - 400.32 - 100 - 55.55 - 62.62 = 531.51
Answer:
70s-70
Step-by-step explanation:
Answer:
no........... is not the answer
