There are 450 students at a school. If each classroom holds 30 students , how many classrooms are needed at school?

Mathematics

1 answer:

Sati [7]4 years ago

3 0

Answer:

15 classrooms

Step-by-step explanation:

You might be interested in

Find the area of the shape. Either enter an exact answer in terms of pi or use 3.14 for pi and enter your answer as decimal.

SVETLANKA909090 [29]

Answer:

27π units^2

Step-by-step explanation:

This shape is exactly 3/4 of a full circle. Thus, if we find the area of a full circle with radius 6 units, we multiply the result by 3/4 to obtain the area of the figure shown.

A of full circle = πr²

In this particular case,

A of full circle = π(6 units)² = 36π units^2

Then the area of the given figure is

(3/4)(36π) units^2, or 27π units^2.

3 0

4 years ago

On a particular day, the wind added 5 miles per hour to Alfonso's rate when he was cycling with the wind and subtracted 5 miles

Nata [24]

now, this is pretty much the same as the one before it with Jaime, so I'll do this without much fuss.

recall d = rt.

a = Alfonso's rate

with the wind his speed is a + 5, against it is a - 5, 60 miles with it and 30 miles against it, all in the same time of t hours.

$\bf \begin{array}{lcccl} &\stackrel{miles}{distance}&\stackrel{mph}{rate}&\stackrel{hours}{time}\\ &------&------&------\\ \textit{with the wind}&60&a+5&t\\ \textit{against the wind}&30&a-4&t \end{array} \\\\\\ \begin{cases} 60=(a+5)t\implies \frac{60}{a+5}=\boxed{t}\\\\ 30=(a-4)t\\ -------------\\ 30=(a-4)\left( \boxed{\frac{60}{a+5}} \right) \end{cases} \\\\\\ 30(a+5)=(a-4)60\implies 30a+150=60a-240 \\\\\\ 390=30a\implies \cfrac{390}{30}=a\implies 13=a$