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son4ous [18]
3 years ago
8

Solve for u. 4u = 16u + 3(–3u − 5) u =

Mathematics
2 answers:
marta [7]3 years ago
8 0

Answer:

u = 5

Step-by-step explanation:

<u>→Distribute the 3 to (-3u - 5):</u>

4u = 16u - 9u - 15

<u>→Add like terms:</u>

4u = 7u - 15

<u>→Subtract 4u from both sides:</u>

0 = 3u - 15

<u>→Add 15 to both sides:</u>

15 = 3u

<u>→Divide both sides by 3:</u>

5 = u

Anarel [89]3 years ago
7 0

Answer:

\boxed{u = 5}

Step-by-step explanation:

=  > 4u = 16u + 3( - 3u - 5) \\  \\  =  > 4u = 16u + (3 \times ( - 3u)) - (3 \times 5) \\  \\  =  > 4u = 16u - 9u - 15 \\  \\  =  > 4u = 7u  - 15 \\  \\  =  > 4u - 7u =  - 15 \\  \\  =  >  \cancel{- }3u =  \cancel{- }15 \\  \\  =  > 3u = 15 \\  \\  =  > u =  \frac{15}{3}  \\  \\  =  > u = 5

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just olya [345]

Answer:

Because we actually divide by 10 when a number is multiplied by 0.1.

Step-by-step explanation:

Let a be a number.

When we multiply a number by 10:

a \times 10 = 10 a (One '0' is increased in the number)

For example:

23 \times 10 = 230

Considering a decimal number:

2.3 \times 10 = 23

Multiplying a number with 0.1 (which is actually \frac{1}{10}) means dividing the number by 10.

23\times 0.1 =23\times \frac{1}{10}=2.3

Considering a decimal number:

2.3 \times 0.1 = 2.3 \times \frac{1}{10} = 0.23

<em>Therefore, When multiplying a number by 0.1, move the decimal to the left.</em>

6 0
3 years ago
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4 0
2 years ago
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madreJ [45]

Answer:

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Step-by-step explanation:

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As you know, the exponent signifies repeated multiplication. So, an increase of 1 in the exponent means the base is part of the product one more time:

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