Answer:
D and below
Step-by-step explanation:
I got this answer by adding total amount of people together then timesing the LOWEST amount spent by the amount of people(101) which was 4 then I added 13 to that but times-ed by 101 since that is the amount of people that spent that amount. I got the number: 1,717 It is asking for all possible answers and so the range of the numbers spent on the bar goes up the number would also go up.
Answer:
-x^4-5x^3+2x²+ 10x = (x+5)(2x-x³)
Step by Step explanation
Naming the coefficient of x² as "a" and the independent temine of the first parenthesis as "b", we got:
-x^4-5x^3+ ax^2 +10x=(x+b)(2x-x^3)
- x⁴-5x^3+ ax^2 +10x = 2x²- x⁴+2bx-bx³
-5x^3+ ax^2 +10x = -bx³+2x²+2bx
( Matching the exponents)
For x: 2b= 10; b=10/2.
b=5
For x²: a=2
For x³: -b=-5
b=5
Answer:
x = 5.5
Step-by-step explanation:
First, you need to distribute the -2:
-2(2+x) = -2x-4
Next you simplify:
x-2x = -x
Then you get all the x values on one side of the equation and everything else on the other side:
7-3x = -x-4 --> 11 = 2x
Finally, you isolate the x by dividing:
2x = 11 --> x = 5.5
The formula states that:
Faces + Vertices - Edges = 2
So 21 + V - 49 = 2 => V = 2+49-21 = 30
Answer A!
Answer:
There is obviously only 1 10x10 square. If we start with a 9x9 square in the top left corner, we can move it down 1, across 1 and back up 1, so there are 4 possible 9x9 squares.
For 8x8 we can move down 1, then 2 and we can move across 1 or 2 so that's 9 possible 8x8 squares.
For 7x7 we can go down 3 and across 3, so that's 4x4=16 possible squares.
The pattern is now clear the total number if squares is 1+4+9+16+…+100.
There's a formula for this, which I had to look up, but any the sum of the first n squared is 1/6n(n+1)(2n+1)1/6n(n+1)(2n+1), so the total number of squares is 10x11x21/6=5x11x7=385.
