2 years ago

B) -2x + (5 - y)2 for x = -3 and y = 2

Mathematics

1 answer:

STatiana [176]2 years ago

4 0

12. The answer would be 12

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A chemical company mixes pure water with their premium antifreeze solution to create an inexpensive antifreeze mixture. The prem

Ne4ueva [31]

Answer:

premium: 165 gallons
water: 120 gallons

Step-by-step explanation:

Let 'a' represent the amount of 95% antifreeze in the mix. Then the amount of water is (285 -a). The mix has this amount of antifreeze in it:

0.95a +0(285 -a) = 0.55(285)

a = 0.55/0.95(285) = 165 . . . gallons of 95%

285 -a = 285 -165 = 120 . . . . gallons of water

There are 120 gallons of water and 165 gallons of premium antifreeze in the mixture.

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2 years ago

What’s the area of a rectangle measuring 13 inches x 12 in?

vitfil [10]

13 x 12 = 156 in<span>2 Hope I could help :)</span>

3 0

3 years ago

Select all the correct answers.

Vlad1618 [11]

Answer:

The measure of reference angle is $30^{\circ}$ .
$\cos \theta=\frac{\sqrt{3}}{2}$

Step-by-step explanation:

Converting $\theta$ to degrees,

$\theta=\left(\frac{11\pi}{6} \right) \left(\frac{180}{\pi} \right)=330^{\circ}$

This means $\theta$ lies in Quadrant 4, and thus its reference angle is $360^{\circ}-330^{\circ}=\boxed{30^{\circ}}$

Since $\theta$ lies in the fourth quadrant, $\sin \theta$ and $\tan \theta$ are negative.

Since $\theta$ lies in the fourth quadrant, $\cos \theta$ is positive, and is equal to $\cos (30^{\circ})=\boxed{\frac{\sqrt{3}}{2}}$

3 0

1 year ago

Find the value of the following expression:

77julia77 [94]

The answer is 9

I hope this helped! Have a great day/evening/night! :)

5 0

3 years ago

Pls help am about to fail....

sdas [7]

Answer:

Step-by-step explanation:

12x-30=6x+18

12x-6x=18+30

6x=48

x=8

Plug back In:

12(8)-30

96-30

8 0

2 years ago