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3 years ago

In a history class, the girl to boy ratio is 5 to 3. If there are 80 students total, how many boys are there?

Mathematics

1 answer:

Brilliant_brown [7]3 years ago

8 0

80x3/8=10 common factor. 10x5. And 10x3

50/30

30 boys

50 girls

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lakkis [162]

your answer is 94.24

89.50-10%+12%+5%

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4 years ago

An experienced ice skater spins on the ice, creating a perfect circle with a radius of 1 yard. What is the circle's circumferenc

zmey [24]

The meaning of circumference is to find the distance around a circle or in other words the perimeter of the circle. The circumference of a circle can be calculate by using the formula C=2πr or C=πd, where r refers to the radius.

In this exercise is given a circle, which radius is 1 yard and it is asked to find its circumference and use 3.14 as the value of pi. In order to do that, you should substitute the given value of the radius and pi into the formula C=2πr.

$C=2 \pi r$
$C=2(3.14)(1 yd)$
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3 years ago

Find the measure of the angle indicated in bold

Marianna [84]

Answer:

x=5

Step-by-step explanation:

hey there

the angles given are corresponding angles meaning that they are congruent

so we set up an equation

23x-5=21x+5

step 1 subtract each side by 5

5-5 cancels out

-5-5=-10

now we have

23x-10=21x

step 2 subtract each side by 23x

21x-23x=-2x

now we have

-2x=-10

step 3 divide each side by 2

-10/-2=5

so we can conclude that

x=5

4 0

3 years ago

WXYZ is a parallelogram. Find the measure of angle Z

Delvig [45]

Given:

The figure of a parallelogram.

To find:

The measure of angle Z.

Solution:

We know that, the consecutive interior angles of a parallelogram are supplementary angles, it means there sum is 180 degrees.

In the given figure angle W and angle Z are supplementary angle. So,

$m\angle W+m\angle Z=180^\circ$

$(18b-11)^\circ+(9b+2)^\circ=180^\circ$

$(27b-9)^\circ=180^\circ$

$(27b-9)=180$

Adding 9 on both sides, we get

$27b=180+9$

$27b=189$

$b=\dfrac{189}{27}$

$b=7$

Now,

$m\angle Z=(9b+2)^\circ$

$m\angle Z=(9(7)+2)^\circ$

$m\angle Z=(63+2)^\circ$

$m\angle Z=65^\circ$

Therefore, the correct option is C.

5 0

3 years ago

I don’t understand soh cah toa. help

Mumz [18]

Answer:

soh cah toa

Step-by-step explanation:

The soh mean when you want to find the sine of an angle you divide the opisite side by the hypotonus or o/h. The cah means when you want to find the cosine of an angle, you divide the adjasent line by the hypotonus or a/h. The toa means whe you want to find the tanjent of an angle, you divide the opisite line ny the adjecent line or o/a. Hope that helps with soh cah toa!

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3 years ago

In a history class, the girl to boy ratio is 5 to 3. If there are 80 students total, how many boys are there?​

In a history class, the girl to boy ratio is 5 to 3. If there are 80 students total, how many boys are there?