3 years ago

If the temperature is dropping at a rate of 2° per hour how many hours will it take to drop 15°

Mathematics

1 answer:

Tju [1.3M]3 years ago

5 0

Answer:

7 1/2

Step-by-step explanation:

If it drops 2 per hour, and you need it to drop 15, divide 15 by 2 and you’ll get 7.5 or 7 1/2

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Simplify.<br> -12 + (-2)(3)

sammy [17]

Answer:

-18

Step-by-step explanation:

-12 + (-2)(3)

= (-12)+((-2)x(3))

= (-12)+(-6)

= (-12)-(6)

= -18

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3 years ago

If one bag of red grapes costs $2, how many bags can we buy with $18?

const2013 [10]

You would be able to get 9 bags of grapes.
2 * 9 = 18

Hope this helps!

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3 years ago

Read 2 more answers

If sin ⁡x=7/25, and 0 < x < π/2, what is cos⁡(x−3π/2)?

Likurg_2 [28]

Answer:

$Cos(x-\frac{3\pi}{2})=-\frac{7}{25}$

Step-by-step explanation:

Remember that $cos(x-y)=cos(x)cos(y)+sin(x)sin(y)$

Then,

$cos(x-\frac{3\pi}{2})=cos(x)cos(\frac{3\pi}{2})+sin(x)sin(\frac{3\pi}{2})\\$

But $cos(\frac{3\pi}{2})=0$ and $sin(x)=\frac{7}{25}$

Then

$cos(x-\frac{3\pi}{2})=cos(x)*0+\frac{7}{25}*sin(\frac{3\pi}{2})\\=\frac{7}{25}*(-1)=\frac{-7}{25}$

5 0

3 years ago

Combine like terms to simplify.<br><br> 5z + 3z - 1/2y+ 2y

Rashid [163]

Answer:

8z-2.5y

Step-by-step explanation:

5+3=8

1/2+ 2= 2.5

7 0

3 years ago

Help please !!!!!!!!!

madam [21]

Answer:

a=200;110;101andb=decreasing

Step-by-step explanation:

a.(100×10+1000)/10=200

(100×100+1000)/100=110

(100×1000+1000)/1000=101

8 0

2 years ago