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KIM [24]
3 years ago
8

Explain why solving (2/5)c = (8/9) by multiplying both sides by (5/2) is the same as solving it by dividing both sides by (2/5)

Mathematics
1 answer:
givi [52]3 years ago
3 0
Dividing by a fraction is the same as multiplying by its reciprocal. So dividing by 2/5 will give you the same answer as multiplying by 5/2.
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Anettt [7]

by studying because that's the hard truth

4 0
3 years ago
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Please solve this question​
oee [108]

Answer:

\frac{1}{81}

Step-by-step explanation:

Using the rule of exponents

a^{-m} ⇔ \frac{1}{a^{m} }

Evaluating from the inside parenthesis outwards

(-\frac{1}{3}) ^{2} = - \frac{1}{3} × - \frac{1}{3} = \frac{1}{9} , then

(\frac{1}{9}) ^{-2} = \frac{1}{9^{-2} } = 9² = 81 , then

(81)^{-1} = \frac{1}{81}

4 0
3 years ago
Solve for the roots in the equation below. In your final answer, include each of the necessary steps and calculations. Hint: Use
AveGali [126]

Answer:   3

<u>Step-by-step explanation:</u>

x^3-27=0\\\\x^3=27\\\\\sqrt[3]{x^3}=\sqrt[3]{27}\\\\x=\sqrt[3]{3\cdot 3\cdot 3} \\\\x=3

6 0
3 years ago
1) Determine the GCF and<br> 2) write the expression in factored form.<br> (6x2 + 4x) + (4x2 – 8x)
Nady [450]

Hey there,

The first step in solving this problem would have to be to add the two binomials together:

  • 10x² - 4x

Knowing this now we find the GCF which would have to be 2x which goes into both terms.

The factored form would have to be 2x(5x - 2).

The GCF is 2x and the factored form is 2x(5x - 2).

Hope I helped,

Amna

4 0
3 years ago
.simplify<br>(2a+5)²-(a+3)(a-3)​
Shtirlitz [24]

Answer:

3a^2 + 20a + 34

Step-by-step explanation:

(2a + 5)^2 = 4a^2 + 20a + 25

(a +3)(a - 3) = a^2 - 9

Put these two partial answers together.

4a^2 + 20a + 25 -(a^2 -9 )                 Remove the brackets.

4a^2 + 20a + 25 -  a^2 + 9

4a^2 + 20a + 25 - a^2 + 9

3a^2 + 20a + 34

6 0
2 years ago
Read 2 more answers
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