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4 years ago

-7=21+x help please thankyou

Mathematics

2 answers:

serg [7]4 years ago

4 0

Move the 21 to the other side and change the sign

-7-21=x
x=-28

hope this helps

Readme [11.4K]4 years ago

4 0

Subtract 21 on both sides.

-7-21=21-21+x
-7-21=x
x=-28

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kramer

Option C: $a=3, b=4$ is the value of a and b

Explanation:

Given that the expression $\sqrt{648}=\sqrt{2^a\times3^b}$

We need to determine the value of a and b

Let us consider the term $\sqrt{648}$ and take the prime factorization of the term 648

Thus, we have,

648 divides by 2,

$648=2 \cdot 324$

324 divides by 2,

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162 divides by 2,

$648=2 \cdot 2 \cdot 2 \cdot 81$

81 divides by 3,

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27 divides by 3,

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9 divides by 3,

$648=2 \cdot 2 \cdot 2 \cdot 3 \cdot 3 \cdot 3 \cdot 3$

Thus, we have,

$\sqrt{648}=\sqrt{2^{3} \cdot 3^{4}}$

Therefore, equating the powers of 2 and 3, we get,

$a=3, b=4$

Hence, the value of a and b is 3 and 4

Thus, Option C is the correct answer.

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Brainliest for anyone if they get this CORRECT.

erastova [34]

hello

it is c

hehehehe hope it helps

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