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Ratling [72]
3 years ago
7

3. (03.01) Which expression is equivalent to 3(5 + 6)? 8+9 8 + 6 15 + 18 15 + 6

Mathematics
1 answer:
Afina-wow [57]3 years ago
8 0

Answer:tytgh

Step-by-step explanation:

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Find volume of the foam
Roman55 [17]

Answer:

35 cubic feet

Step-by-step explanation:

127 137

If you divide the foam into 2 rectangular prisms, you will get a rectangular prism with dimensions of 1 * 2 * 7, and another prism with dimensions of 1 * 3 * 7. You find the separate volumes of each, and get 14 ft^3, and 21 ft^3. You add these together to get 35 ft^3

8 0
3 years ago
Find the exact values of sin(u/2) cos(u/2) and tan(u/2) given sin u=24/25 and pie/2 < u < pie
vlada-n [284]

Recall the double/half angle formulas:

\cos^2\dfrac x2=\dfrac{1+\cos x}2

\sin^2\dfrac x2=\dfrac{1-\cos x}2

We're given \sin u=\frac{24}{25}, and since u is between π/2 and π, we expect \cos u to be negative. So from the Pythagorean identity, we find

\sin^2u+\cos^2u=1\implies\cos u=-\sqrt{1-\sin^2u}=-\dfrac7{25}

Also, we know \frac u2 will fall between π/4 and π/2, so both \sin\frac u2 and \cos\frac u2 will be positive. Then we find

\cos\dfrac u2=\sqrt{\dfrac{1+\cos u}2}=\dfrac35

\sin\dfrac u2=\sqrt{\dfrac{1-\cos u}2}=\dfrac45

and it follows that

\tan\dfrac u2=\dfrac{\sin\frac u2}{\cos\frac u2}=\dfrac43

8 0
4 years ago
A car is traveling at a rate of of 55 miles per hour. how many feet oer hour does the car travel?
Ray Of Light [21]
There are 5280 ft in a mile. 55*5280=290400. So the car is travelling 290,400 ft/hour
7 0
3 years ago
It is 70cm long and has a circumference of 40cm what is the radius
Aleksandr [31]
The legnth is irrelivant

we know that
Circumference=2 times pi time radius

c=40
40=2 times pi times radius
divide both sides by 2
20=pi times radius
divide both sides b pi
20/pi=radius

the radius is 20/pi cm or aproximately 6.366199048 cm
4 0
3 years ago
PLEASE HELP THIS IS REALLY IMPORTANT
Svet_ta [14]

Answer:

a) x^2-x-20\\

b) what?

c) -70

Step-by-step explanation:

If you have any questions feel free to ask in the comments - Mark

sorry for the terrible answer

3 0
3 years ago
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