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aivan3 [116]
3 years ago
11

Do you know when to choose an estimate or an exact amount?

Mathematics
1 answer:
ludmilkaskok [199]3 years ago
7 0
Use exact amounts when using a calculator or if you have pencil and paper. Use an estimate when doing it in your head.

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4x-3=2x+5-3 whats the answer
ivolga24 [154]
The answer is 5/2
4x - 3 = 2x + 5 - 3 \\ 4x - 2x = 3 + 5 - 3 \\ 2x = 5 \\  x =  \frac{5}{2}



good luck
3 0
3 years ago
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Pleasee mwa mwa mwa help me
sammy [17]

Answer: About (-2.414, 0) and (0.414, 0)

Step-by-step explanation:

       Let us graph the equation given and see what the x-intercepts are. These are points where the line intercepts the x-axis. <em>See attached</em>.

       This means our x-intercepts are at about (-2.414, 0) and (0.414, 0).

                        These are also equal to -1-\sqrt{2} and  -1+\sqrt{2}

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2 years ago
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Is b 90 degrees or do I have to do 180- something
larisa86 [58]

Answer:

90 degrees since its vertical angle

8 0
3 years ago
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Solve the system using substitution.
valkas [14]

Good evening ,

Answer:

<h2>(3,15)</h2>

Step-by-step explanation:

y=5x then

4x-y= -3 ⇌ 4x-5x= -3 ⇌ -x= -3 ⇌ x=3

and since y=5x then y=5×3=15.

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5 0
3 years ago
One pipe can fill a pool in 9 hours. Another pipe can fill the pool in 6 hours. How long would it take them to fill the pool if
kow [346]

Answer:

3.6 hours or 3 hours and 36 minutes.

Step-by-step explanation:

If the first pipe can fill the pool in 9 hours that means that in 1 hour it fills \frac{1}{9} of the pool, we use the same logic for the second pipe and conclude that in 1 hour it feels up \frac{1}{6} of the pool. If both were to fill the pool together that means that in 1 hour they would fill...

\frac{1}{9} +\frac{1}{6} = \frac{5}{18} of the pool in 1 hour.

Now to find how many hours it will take divide the pool by the speed with which it is getting filled.

1 / \frac{5}{18} = 3.6 hours

3.6 hours in other words is 3 hours and 36 minutes.

3 0
2 years ago
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