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dusya [7]
3 years ago
8

Which of the following are CORRECT answers

Mathematics
1 answer:
kap26 [50]3 years ago
7 0

(2x+3)^2=11\to2x+3=\pm\sqrt{11}\ \ \ |-3\\\\2x=-\sqrt{11}-3\ \vee\ 2x=\sqrt{11}-3\ \ \ |:2\\\\x=\dfrac{-\sqrt{11}-3}{2}\ \vee\ x=\dfrac{\sqrt{11}-3}{2}

Answer: C. and E.

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From the top of a building 42 feet high, the angle of depression to a car stopped on the ground is 27 degrees. What is the dista
lions [1.4K]

Answer: it equals to 82

Step-by-step explanation:

3 0
3 years ago
If hot and cold water taps are turned on altogether, a bath is filled in three minutes but if the cold tap was only half opened
Anvisha [2.4K]

9514 1404 393

Answer:

  12 minutes

Step-by-step explanation:

Let c and h represent the filling times for the cold and hot taps, respectively. When the cold tap is 1/2 open, we presume that means the filling time becomes 2c.

In terms of baths per minute, the relationships are ...

  1/c + 1/h = 1/3

  1/(2c) +1/h = 1/(3 +1.8) . . . . . 1:48 min:sec is 1.8 minutes

Subtracting the first equation from twice the second, we get ...

  2(1/(2c) +1/h) -(1/c +1/h) = 2(1/4.8) -(1/3)

  1/h = 2/4.8 -1/3 = 1/12

  h = 12

It takes the hot tap 12 minutes to fill the tub alone.

3 0
3 years ago
A case of 24 tennis balls weighs 3 pounds. How much would a shipment of 2560 tennis balls weigh? Please write
kolbaska11 [484]

The weight of a shipment of 2560 balls weighs 320 pounds.

<h3>How much would a shipment of 2560 tennis balls weigh?</h3>

We know that 24 tennis balls weigh 3 pounds. Then the weight of a single tennis ball is:

W = (3 lb)/(24 balls) = (1/8) pounds per ball.

To get the weight of 2560 tennis balls, we just need to multiply the number of tennis balls by the weight of a single ball, then we get:

Total weight = 2560*(1/8) pounds per ball = 320 pounds.

The weight of a shipment of 2560 balls weighs 320 pounds.

If you want to learn more about weight:

brainly.com/question/25973294

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8 0
1 year ago
What is (look at image) reduced to simplest form?
seraphim [82]

Answer:

<h2><em><u>ANSWER </u></em><em><u>:</u></em><em><u>-</u></em><em><u> </u></em></h2><h2 /><h2><em><u>\frac{8}{x {}^{6} }</u></em></h2>

4 0
2 years ago
If the top of the bulletin board is 74 3/4 inches above the floor and the bottom is 38 1/2 inches above the floor, then what is
wel

Answer:

36 1/4 inches

Step-by-step explanation:

Subtract 38 1/2 from 74 3/4:

74.75 - 38.5

= 36.25 or 36 1/4

So, the vertical measurement of the bulletin board is 36 1/4 inches

7 0
2 years ago
Read 2 more answers
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