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kirza4 [7]
4 years ago
13

What addition doubles fact can help you find 4+3? explain

Mathematics
1 answer:
adell [148]4 years ago
6 0
U can. Do 3+4 u just switch the number
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there are 270 at Colfax Middle School, where the ratio of boys to girls is 5:4. there are 180 students at Winthrop Middle School
ruslelena [56]

Colfax:

Add the ratio numbers together:

5 + 4 = 9

Divide total students by that:

270 / 9 = 30

Multiply each ratio by 30:

Boys = 30 *5 = 150

Girls = 30 * 4 = 120


Do the same for Winthrop:

4 +5 = 9

180 /9 = 20

Boys = 20 * 4 = 80

Girls = 20 * 5 = 100


Total students = 270 + 180 = 450

Total Girls = 120 + 100 = 220


Fraction that are girls = 220 / 450 which reduces to 22/45

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4 years ago
4n - 2n = 4<br> Can someone help me solve this?
Semmy [17]

Answer:

n= 2

Step-by-step explanation:

i know this is right

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How many ways can Hannah give three of her eight T-shirts to her younger sister?
prisoha [69]
If Hannah gives her younger sister 3 shirts, it does not matter what order she hands them to her. No matter the order, it will still be the same group of 3 shirt. Since order is not important this problem can be solved using a combination.

Specifically we are asked to find 8C3 (sometimes called "8 choose 3"). This is a fraction. In the numerator we start with 8 and count down 3 numbers. In the denominator we start with 3 and count all the way down to 1. Thus we obtain,

\frac{(8)(7)(6)}{(3)(2)(1)}=(8)(7)=56
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3 years ago
Write two subtraction equations to show how to find 15 - 7
pantera1 [17]
15-7=8         
i hope it helps
5 0
4 years ago
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Marco drove 75 miles in hours. How many miles can he drive in 1 hour?
Nutka1998 [239]

Answer:

75

Step-by-step explanation:

75m/hr

3 0
3 years ago
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