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Leto [7]
3 years ago
7

Which is a solution to the equation 3x^2 + 2x − 20 = 2x^2 + 15?

Mathematics
1 answer:
pychu [463]3 years ago
6 0

the answer is b)-7 or it could be 5

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-3x3=<br> Heeeeeeeellllllllllllpppppppppp<br> Mmmmmeeeeeee
vlada-n [284]

Answer:

-3*3=-9

Step-by-step explanation:

3 0
4 years ago
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A person sights a boat from 235 feet above sea-level as shown. If the angle of depression from the man to the boat is 21 , then
Evgen [1.6K]

Answer:

B = 612.2 ft

Step-by-step explanation:

Solution:-

- The elevation of person, H = 235 ft

- The angle of depression, θ = 21°

- We will sketch a right angle triangle with Height (H), and Base (B) : the boat's distance to the edge of the cliff and the angle (θ) between B and the direct line of sight distance.

- We will use trigonometric ratios to determine the distance between boat and the edge of the cliff, using tangent function.

                             tan ( θ ) = H / B

                             B = H / tan ( θ )

                             B = 235 / tan ( 21 )

                             B = 612.2 ft    

4 0
3 years ago
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All the items on the sale rack were 75 percent off their original price.
tresset_1 [31]

Answer:

112 $ is the original price

Step-by-step explanation:

x \times 0.75 = 84 \\ x = 84 \div 0.75 \\ x = 112

you have to think that the original price multiplied by 0.75 (also known as 75%) gave the result of what he saves i.e 84 $. So we put up an equation with the original price multiplied by 75% which equals the 84 $ he saved on buying that item on sale

4 0
3 years ago
If it costs 3.99 for 24 ounces how much woud it cost for 1
MariettaO [177]

Answer:0.16625

Step-by-step explanation:

5 0
3 years ago
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(2 * 15x) + (2 * 10)
yan [13]

Answer:

(2 \times 15x) + (2 \times 10) \\  = 30x + 20 \\  = 10(3x + 2)

6 0
3 years ago
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