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saveliy_v [14]
3 years ago
5

A school has 20% of girls and 160 boys, how many kids are in the school?

Mathematics
1 answer:
ioda3 years ago
8 0

Answer:

200

Step-by-step explanation:

20%=girls

=100%-20%

80%=boys

80%/100×y=160

=160÷80%/100

=160×100/80

=200

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An arc with length 5 pi over 4 inches is formed by a 15 degree central angle what is the radius of the circle
Natalka [10]

Answer:

Radius of the circle is <em>15 inches.</em>

<em></em>

Step-by-step explanation:

Relation between length of arc, radius and the angle subtended by the arc on center is:

\theta = \dfrac{l}{r} ..... (1)

where \theta is the central angle in radians subtended by arc

l is the length of arc

r is the radius of arc

We are Given the following details:

l = \dfrac{5\pi}{4}\ inch

\theta = 15^\circ

We know that \pi \ radians = 180 ^\circ

Converting \theta to radians:

\theta =\dfrac{\pi}{180} \times 15 radians

Putting the values of \theta and l to find the value of r

\dfrac{\pi}{180} \times 15 = \dfrac{5\pi}{4r}\\\Rightarrow r = \dfrac{45}{3} \\\Rightarrow r = 15 \ inches

Hence, Radius of the circle is <em>15 inches.</em>

6 0
3 years ago
What is 8587 divided by 12
azamat
The answer is <span>715.583333333

</span>
8 0
3 years ago
Which word phrase represents the numerical expression below? * 4+(27-10)
lorasvet [3.4K]

Answer:

4 plus the difference of 27 and 10

Step-by-step explanation:

6 0
2 years ago
Use the distributive property to expand this expression: 7(a - 3) =
Natali [406]

1) Expand by distributing terms

7a+7 x-3

Simplify 7x-3 to -21

7a-21

4 0
3 years ago
Read 2 more answers
A retailer returned 2700 defective items to the manufacturer and received a credit for the retail price of $0.83 or 834/34 per i
Helga [31]

Answer:

credit gain by retailer is $2257.39

Step-by-step explanation:

Given data:

Retaile price 83 4/3 c or 84.33c

Let Discount rate 6/7

Discount amount = (6/7)% of 84.33 c = 0.7228 C

Net credit received = 84.33c - 0.7228c = 83.607c

Net credit received = 83.607 c

Item required  = 2700

Total discount = 2700 × 83.0607 = 225739.44c

Total discount = $2257.39

credit received by retailer is $2257.39

8 0
3 years ago
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