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3 years ago

Plz explain why plz and thx asap

Mathematics

1 answer:

Elenna [48]3 years ago

3 0

To find the area of a rectangle, you multiply the base by the height.
So in this case, the base of the rectangle would be 17cm, and the height would be 22.
17 x 22 = 374cm²

You also need to find the area of the triangle.
The area of a triangle is the base multiplied by the height and then halved.
In this case, the base would be 19cm, and the height would be 22 - 10 = 12 (if you minus 10 from 22, you would find the length of the unknown side of the triangle).
19 x 12 = 228
Half of 228 is 114cm²

Add the area of the triangle with the area of the rectangle to give the area of the whole shape.
374 + 114 = 488cm²

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40% of the students in a class are girls and the number of boys is 24 find the total number of students and the number of girls

navik [9.2K]

Answer:

Girls = 16

Total students = 40

Step-by-step explanation:

40% of the students are girls, this means 60% of the students are boys.

To find the number of girls, setup a proportion using the percentages and actual number of students in the class. I am going to make the numerator the numbers that go with the girls and the denominator will be the numbers that go with the boys.

Also let's convert the percentages to decimals by moving the decimal two places left.

40% = 0.4 and 60% = 0.6

$\frac{.4}{.6} =\frac{g}{24} \\.6g=9.6\\\frac{.6g}{.6} =\frac{9.6}{.6} \\g=16$

Now let's find the total number of students by adding the number of girls to the number of boys.

16 + 24 = 40

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1 year ago

Apply the distributive property to create an equivalent expression.<br><br> <br> 1/2 (2a−6b+8) = ?

katen-ka-za [31]

Answer:

a-3b+4

Step-by-step explanation:

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=1/2*2a-1/2*6b+1/2*8

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2 years ago

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2 years ago

What is the y intercept of x=14

Sophie [7]

Answer:

Step-by-step explanation:

x=14 is a vertical line with undefined slope

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2 years ago

Let $r$ and $s$ be the roots of $3x^2 + 4x + 12 = 0.$ Find $r^2 + s^2.$ Pls help.

nirvana33 [79]

Answer:

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Step-by-step explanation:

By Vieta's formulas,

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$r^2 + 2rs + s^2 = \frac{16}{9}.$ Therefore,

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