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2 years ago

72 is 25% of students that have a cat, how many total students are there?

Mathematics

1 answer:

Lemur [1.5K]2 years ago

7 0

Answer:

the answer is 288 because 72 would be one fourth or 25% of 288. 72 plus 72 plus 72 plus 72 equals 288 equals 100%

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Ms. Carson's art class made a large rectangular mural. The length of the mural is 9 feet, and it's area is 72 square feet. What

lorasvet [3.4K]

You do the reverse and divide the 2 values to find out the last one

72/9 = 8

Do you get it?

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2 years ago

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Brainliest if corerct

AysviL [449]

Step-by-step explanation:

$2x + 2 = 3x - 52$

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2 years ago

Find the exact value of cos(7\pi /12)

Naya [18.7K]

7π/12 lies in the second quadrant, so we expect cos(7π/12) to be negative.

Recall that

$\cos^2x=\dfrac{1+\cos(2x)}2$

which tells us

$\cos\left(\dfrac{7\pi}{12}\right)=-\sqrt{\dfrac{1+\cos\left(\frac{7\pi}6\right)}2}$

Now,

$\cos\left(\dfrac{7\pi}6\right)=-\cos\left(\dfrac\pi6\right)=-\dfrac{\sqrt3}2$

and so

$\cos\left(\dfrac{7\pi}{12}\right)=-\sqrt{\dfrac{1-\frac{\sqrt3}2}2}=\boxed{-\dfrac{\sqrt{2-\sqrt3}}2}$

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2 years ago

A car drives east along a road at a constant speed of 46 miles per hour. At 4:00 P.M., a truck is 264 miles away, driving west a

sveticcg [70]

Answer:

The speed of the truck is 42 mph

Step-by-step explanation:

we know that

The speed is equal to divide the distance by the time

Let

s -----> the speed in miles per hour

d ----> the distance in miles

t ----> the time in hours

$s=\frac{d}{t}$

$d=s(t)$

step 1

Find out the distance traveled by the car at 7:00 P.M

we have

$s=46\ \frac{mi}{h}$

$t=7:00 P.M-4:00 P.M=3\ h$

$d=s(t)$

substitute the values

$d=46(3)=138\ mi$

step 2

Find out the speed of the truck

we know that

At 7:00 P.M the distance is equal to

$d=264-138=126\ mi$

$t=7:00 P.M-4:00 P.M=3\ h$

substitute

$s=\frac{126}{3}$

$s=42\ \frac{mi}{h}$

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2 years ago