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Lesechka [4]
2 years ago
7

Help pls dont answer if you don’t know also ill give brainliest

Mathematics
1 answer:
Nostrana [21]2 years ago
7 0

Answer:

equation: 3x+4 = 31

x = 9

Step-by-step explanation:

1. -2x+5x = 3x

2. 3x + 6 - 2

3. 6+-2 = 4

4. 3x+4 = 31

5. equation: 3x+4=31

6. 31-4 = 27

7. 3x=27

8. 27/3 = 9

9. x= 9

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the hoover dam is 725 feet tall. how long would it take an object to fall from the top to the base of the dam? round the answer
Alinara [238K]

Answer:

45.05 seconds

Step-by-step explanation:

Use the formula: d = vi t + \frac{1}{2} at^{2}

d = distance      vi = initial velocity (m/s)    

t = time (s)     a = acceleration (m/s^{2})

m is meters and s is seconds. They are units of measurement so leave them be.

Assuming the object is simply dropped, the initial velocity is 0 since the object was not moving before it was dropped.

The distance is 725 feet, which is 220.98 meters.

The acceleration is 9.81m/s^{2} since that is the acceleration of Earth's gravity, aka free fall.

Time is what we are trying to find so just leave it as the variable t.

So plug the values into the equation:

220.98m = (0)(t) + \frac{1}{2} (9.81m/s^{2})(t)

220.98m = (4.905m/s^{2})(t)

45.0519877676s = t

t = 45.05s

Remember to pay attention to units because your answer will be wrong otherwise

7 0
2 years ago
You start at (-3,-2). you move down 1 and left 1 unit. where do you end?​
Roman55 [17]
You will end at (-4, -3)
7 0
3 years ago
Which of the following numbers is irrational
max2010maxim [7]
The square root of 5
6 0
3 years ago
Read 2 more answers
Which one is it please help tank you!
Len [333]

Answer:

3.6 × 10^4

Step-by-step explanation:

its the first one, the dark blue one

6 0
3 years ago
Jamey says she only has 30% of her book to go before she finishes it. she has read 147 pages so far
Lubov Fominskaja [6]
Let's just change your problem to 147 of 30% 

"Of" is always equaling to multiplication (×)

Now, it would be easier to simplify 

30% (147)
30% ÷ 100 = 0.3
0.3(147)
Now, we get to your answer which might be 44.1



4 0
3 years ago
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