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Nitella [24]
3 years ago
9

There are 3 boys for every 2 girls in a dance competition. Does it make sense for there to be a total of 9 people in the competi

tion? Explain.
Mathematics
2 answers:
rjkz [21]3 years ago
6 0

Answer:

Yes

Step-by-step explanation:

3:2 = 5 people

3:1 = 4 people

5+4=9 people

dimulka [17.4K]3 years ago
3 0
3:2=5
so girls are 2:5
set up the proportion
2/5=x/9
5x=18
x=3.6 girls; doesn’t work so no!

another way you can look at it is because there are 3 boys for every 2 girls, add 2 more girls, you’ll get 3 more boys
that makes the total of 10 people so 9 is impossible
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take a hiset math test need help refresh with my study guide.and refresh help calculator how to use a scientific one​
n200080 [17]

Answer:

B) 4,320

Step-by-step explanation:

You would first find the volume of the triangular prism using this formula:

V = 1/2 x A x C x H

A = 3 C = 6 H = 24

V = 1/2 x 3 x 6 x 24 = 216 cubic feet

Since there are 20 pounds of snow per cubic foot, you multiply the cubic feet (216) by the pounds of snow per cubic foot (20):

216 x 20 = 4,320 pounds

4 0
3 years ago
Samuel is looking at the floor plan of his house to determine how much carpet he needs to buy for his basement. Based on the flo
DerKrebs [107]

Answer:

B) First, find two areas using (4m x 10m = 40m2) and (8m x 3m = 24m2). Next, add (40m2 + 24m2 = 64m2).

Step-by-step explanation:

Samuel should is looking to find the area of his basement in order to cover it with carpet.

An area is calculated by multiplying two dimensions (so answers A and D are not it).

Best solution is to divide the area into two large rectangles then ADD them together to get the total area.

The only scenario where he could have subtracted something based on his plan is if he would have multiplied the 10m by the 12m then subtracted the area that is not part of his basement (7mx8m).  He would have achieved the same result of course, but by going a different way.

3 0
3 years ago
Write the following word phase as a mathematical equation. The sum of 7 and twice a number, squared.
agasfer [191]

Answer:

(7+(2n))^2

You don't technically need the ( ) around the 2n, but I included them to avoid confusion.

4 0
2 years ago
4(1-2b)+7b-10
likoan [24]

Answer:

if you're simplifying, it should be = -1b - 6

Step-by-step explanation:

1. 4(1-2b) + 7b -10 solve the parenthesis

2. 4 <u>- 8b</u> <u>+ </u><u>7b</u> - 10 combine like(same) terms

3. <u>4</u> - 1b <u>- 10</u> same as 2.

4. -1b - 6

5 0
2 years ago
7x - 2 = 2y
ser-zykov [4K]
\left\{\begin{array}{ccc}7x-2=2y\\3x=2y-1\end{array}\right\\\\substitution:\\\\3x=7x-2-1\\3x-7x=-3\\-4x=-3\ \ \ /:(-4)\\x=\frac{3}{4}\\\\2y=7\cdot\frac{3}{4}-2=\frac{21}{4}-2=\frac{21}{4}-\frac{8}{4}=\frac{13}{4}\\2y=\frac{13}{4}\ \ \ \ /:2\\y=\frac{13}{8}\\\\Answer:x=\frac{3}{4};\ y=\frac{13}{8}.
6 0
3 years ago
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