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3 years ago

In how many ways can a teacher arrange 5 students in the front row of a classroom with a total of 20 students?

Mathematics

1 answer:

makkiz [27]3 years ago

7 0

C, 60,480 i took thiis before it easy as

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Find x. A. 21√2 B. 7 C. 21√3 over 2 D. 21√2 over 2

kkurt [141]

Answer:

Step-by-step explanation:

for you to find x you first have to find the adjacent of the 45° angle you can do that by using the other triangle.using the sin ratio

sin60=opposite/hypotenuse

sin60=a/7√3

a=10.5

then after you have found the adjacent you can use the cos ratio

cos45=adjacent/hypotenuse

cos45=10.5/x

cos45x/cos45=10.5/cos45

x=14.849

which is the same as 21√2 over 2

I hope this helps

5 0

3 years ago

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Sadie computes the perimeter of a rectangle by adding the length, l , and width, w , and doubling this sum. Eric computes the pe

larisa [96]

a) P = 2(l+w) Sadie

P =2l+2w Eric

b) Sadie : P = 2(30+75) = 2(105) = 210

Eric: P = 2(30) +2(75) = 60+150 =210

4 0

3 years ago

Simplify using the laws of exponents (4^3)^-2 × (2^3)^4 ×(8/15)^-2

katrin2010 [14]

Answer:

$\dfrac{225}{64}$

Step-by-step explanation:

$(4^3)^{-2} \times (2^3)^4 \times (\dfrac{8}{15})^{-2} =$

$= (2^2)^{-6} \times 2^{12} \times (\dfrac{15}{8})^{2}$

$= 2^{-12} \times 2^{12} \times \dfrac{225}{64}$

$= \dfrac{225}{64}$

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3 years ago

There are 3900 workers in the three main buildings downtown. Twice as many people work in the largest building as in the smalles

Aleks04 [339]

There are 850 workers in the smallest building, 1350 workers in the second-largest building, and 1700 workers in the largest building.

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4 years ago

What is 90 divided by 2

Anon25 [30]

90 ÷ 2 is the same as 1/2 of 90.

Either way you get 45.

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3 years ago

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