This problem makes no sense to me, can someone help?.

Mathematics

2 answers:

xxTIMURxx [149]4 years ago

3 0

Answer:

The angle is 120 degrees.

Step-by-step explanation:

Supplementary angles add up to 180 degrees.

So if our angle is x it's supplement is 180 - x.

So we have the equation:

x = 2(180 - x)

x = 360 - 2x

3x = 360

x = 120 (answer).

Nitella [24]4 years ago

3 0

Answer:

Step-by-step explanation:

you gotta find out what the number of the suplement is and then multiply that by two and then youll get your answer

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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

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