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3 years ago

11

Explain in words how you would evaluate the expression 5.1 + q ÷ 3.4 for q = 28.9

2 answers:

Andrei [34K]3 years ago

5 0

Substitute 28.9 for q
It becomes
5.1 + 28.9 ÷ 3.4
You’ll leave like this since it’s not an equation

statuscvo [17]3 years ago

4 0

You would plug in twenty eight point nine to the q. So it would be five point one plus twenty eight point nine divided by three point four, which equals thirteen point six.

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-4x + 7 = 11 help me please!

lyudmila [28]

-4x + 7 = 11

First, subtract 7 from both sides. / Your problem should look like: $-4x = 11 - 7$
Second, subtract 11 - 7. / Your problem should look like: $-4x = 4$
Third, divide both sides by -4. / Your problem should look like: $x = \frac{4}{-4}$
Fourth, change the fraction to a negative. / Your problem should look like: $x = -\frac{4}{4}$
Fifth, cancel 4 out. / Your problem should look like: $x = -1$

Answer: x = -1

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Vsevolod [243]

2, 3, 5, 7, 11, 13, 17, 19, 23

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4 years ago

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Three pipes A, B and C take 24, 36 and 32 hours to fill a pool, respectively. How long would it take the three pipes to fill the

Murrr4er [49]

Answer:

12 hours

Step-by-step explanation:

Time taken by pipe A = 24 hours

Time taken by pipe B = 36 hours

Time taken by pipe C = 32 hours

To find:

How long would it take the three pipes to fill the pool if pipe B is turned on 3 hours after pipe A and pipe C is turned on 1 hour after pipe B?

Solution:

First of all, let us assume the total capacity of the pool.

Let us take LCM of 24, 36 and 32.

LCM of 24, 36 and 32 = 288

Let the total capacity of the pool = 288 units

Total units filled by pipe A in one hour = $\frac{288}{24} = 12\ units$

Total units filled by pipe B in one hour = $\frac{288}{36} = 8\ units$

Total units filled by pipe C in one hour = $\frac{288}{32} = 9\ units$

Now, for the first 3 hours, only pipe A operates, so units filled in first three hours = $12\times 3 =36\ units$

For the next one hour, A and B both operate together, so units filled in the next 1 hour = 12 + 8 = 20 units

Total number of units filled in 4 hours = 36 + 20 = 56 units

Units to be filled to completely fill the pool = 288 - 56 = 232 units

Now, after the 4th hours, all the pipes operate together.

So, number of units filled in each hour = 12 + 8 + 9 = 29 units

Time taken to fill 232 units = $\frac{232}{29} = 8\ hours$

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Write an expression to represent: Six less than the product of four and a number x

Nutka1998 [239]

Answer:

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Step-by-step explanation:

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Fynjy0 [20]

Answer:

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Step-by-step explanation:

5p+3p+(-9)

Combine like terms

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