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AleksandrR [38]
3 years ago
9

there are 12 boys and 10 girls in the gym class. If 6 more boys joined , how many more girls are needed to stay at the same rati

o.
Mathematics
1 answer:
Aleonysh [2.5K]3 years ago
8 0
\frac{12}{10}= \frac{18}{x}  

cross multiply
12x=180
divide both sides by 12
x=15
if their is 10 girls, then you need 5 more to keep the ratio. 

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Find the circumference of this figure. Show your calculations.
solong [7]

Answer:

Circumference of circle= 37.68 units

Circumference of sector= 6.28 units

Step-by-step explanation:

The given figure is a circle with given radius OB= 6 units.

The circumference of a circle is the total length of its boundary.

For the complete circle its circumference can be calculated by;

           Circumference= 2\pi r

                                 =2*3.14*6\\=37.68 units

For the circumference of the Sector with 60° in the figure, the circumference can be calculate by:

                              =\frac{60}{360}* 2*\pi*6\\\\=\frac{1}{6}*12*3.14\\\\ =2*3.14\\\\=6.28 units

So, the circumference of the full circle is 37.68 units and the circumference of the sector is 6.28 units.

5 0
3 years ago
on monday, a parking garage was 60% full, with 120 cars parked. on tuesday, there were 30 more cars parked jn the garage than th
vlada-n [284]

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Step-by-step explanation:

we know that 60% of x is 120. we can rewrite this to .6x = 120, to get x we divide both sides by .6, so x = 200. now 120 + 30 = 150. then we divide 150 out of 200 which is .75 it 75%

8 0
3 years ago
A wheel has a diameter of 28 inches. What is the approximate distance around the outside of the wheel? Use 3.14 for pi.
prohojiy [21]

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43.96

Step-by-step explanation:warning might be wrong

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For Exercises 19-24, a, b, c, and d are distinct lines in the same plane. For each combination of relationships, tell how a and
Olegator [25]

Answer:

a is parallel to d

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RESULT

They are parallel

Step-by-step explanation:

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