Is the last number together??
Answer:

Step-by-step explanation:
The surface area of right triangular prism is the sum of area of two base triangles and 3 area of side rectangles.
The area of base triangle is

where a is the length of the side of equilateral triangle. In your case, a=6 inches. Thus,

The area of side rectangle is

where h is the height of the rectangle. In your case, h=10 inches. Thus,

Hence, the surface area is

Answer:
<em>i</em>
Step-by-step explanation:
The square root of a negative number is identified as an imaginary number (<em>i </em>)
An imaginary number (i) with exponent 3 or any other exponent remains an imaginary number.
The answer is:
<em>i</em>
Your mistake is that week 3 is twice of week 2
week2=x+5, twice of that is 2(x+5)=2x+10, you did not distribute the 2 to the 5 and you got 2x+5, that is your mistake
x is first week
2nd week is y
3rd is z
5 more the 2nd week than 1st week
x+5=y
3rd week is double 2nd wee
z=2y
total is 431
x+y+z=431
sub
y=5+x and z=2y
x+5+x+2y=431
sub 5+x for y
x+5+x+2(5+x)=431
x+5+x+10+2x=431
4x+15=431
minus 15
4x=416
divide by 4
x=104
add 4
x+5=109
double
2*109=218
they sold
1st week: 104
2nd week: 109
3rd week: 218
3(x+5)+2x
First, distribute 3 to all terms within the parenthesis
3(x) = 3x
3(5) = 15
3x + 15 + 2x
Combine like terms
(3x + 2x) + 15
5x + 15
(B) is your answer
hope this helps