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
The Answer is A.
Repeating number is not a function. It's ok to have repeating number in Y or the range but not the X which is the Domain.
Answer:
Full Endorsement
Step-by-step explanation:
*APEX*
You combine like terms
Example: 5x^3+3x+1-4x^3-2x-1
The answer would be x^3+x
Answer:
C) $17.36
Step-by-step explanation:
As Jay Stone earns $280 a week as gross weekly pay which is the amount he earns before taxes are deducted and you know that the rate is 6.2%, you can calculate the amount that is deducted from his pay this week for Social Security taxes by finding the 6.2 percent of his gross weekly pay:
$280*6.2%= $17.36
According to this, the amount that is deducted from his pay this week for Social Security taxes is $17.36.
