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Ray Of Light [21]
3 years ago
6

Im not verry good at these can you help me please​

Mathematics
1 answer:
DIA [1.3K]3 years ago
7 0

Answer:

It is A

Step-by-step explanation:

A because, you multiply -2 on both sides on the side with the x it cancels out on the one with the 5 it turns into -10 so the answer would be A

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water goes over Niagara Falls at the rate of 180 million cubic feet every 1/2 hour. how much water goes over the Falls in 1 minu
Papessa [141]

Answer:

6×10⁶ cubic feet

30:1

Step-by-step explanation:

Water goes over Niagara Falls at a rate of 180 million cubic feet every \frac{1}{2} hours.

Now, 180 million cubic feet ≡ 18×10⁷ cubic feet

and \frac{1}{2} hours =30 minutes.

As the water is falling at a constant rate, hence, the unitary method of calculation can be applied.

Therefore, in 1 minute, the amount of water that goes over the falls will be  

18×10⁷/30 =6×10⁶ cubic feet.

So, the amount of water passing over the falls is reduced in the ratio 30:1. (Answer)

7 0
3 years ago
My question is <br><br> 4(2 - W) + w = 20
OLEGan [10]

Answer:

- 4

Step-by-step explanation:

Step 1:

4 ( 2 - w ) + w = 20           Equation

Step 2:

8 - 4w + w = 20       Multiply

Step 3:

8 - 3w = 20       Combine Like Terms

Step 4:

- 3w = 12     Subtract 8 on both sides

Answer:

w = - 4

Hope This Helps :)

3 0
4 years ago
Read 2 more answers
Solve.<br> 3<br> b=-a<br> a + b = 21
Eva8 [605]

Answer:b=-10.5, a=31.5

Step-by-step explanation: 3b=-a , -3b=a

a+b =21

-3b+b = 21

-2b=21

b=-10.5

a=-3b

a=-3*-10.5=31.5

4 0
3 years ago
What is the value of the digit 7 in 870,541
faust18 [17]
The value of 7 in 870,541 is 10,000
3 0
4 years ago
Can someone help me with the answer to this question???
sesenic [268]
Okay bb
Ummm I think the answer is
7 0
3 years ago
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