2 years ago

What are the answer 1/7 of 21

Mathematics

1 answer:

HACTEHA [7]2 years ago

8 0

Answer:

The answer is 3.

Step-by-step explanation:

1/7(21)= 3

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What is 4x + 6 = -x + 1

Kamila [148]

Ok so let’s write out the problem
4x+6=-x+1
We first want to get the x’s on one side and the numbers on the other

4x+6=-x+1
+x. +x

5x+6=1

Now we want to get the 6 over

5x+6=1
-6. -6

5x=5

Divide by 5 to get the x alone
X is equal to 1

8 0

4 years ago

Please can someone show me how to work this out step by step without a calculator

Artyom0805 [142]

$2\sqrt8\times8\sqrt2=(2\times8)\sqrt{8\times2}=16\sqrt{16}=16\times4=64$

Alternatively, you can write radicals as rational exponents, so that you get

$2\sqrt8\times8\sqrt2=2\tiems8^{1/2}\times8\times2^{1/2}=2^{3/2}8^{3/2}$

Then recalling that $2^3=8$ , you have

$2^{3/2}8^{3/2}=2^{3/2}(2^3)^{3/2}=2^{3/2}2^{9/2}=2^{12/2}=2^6=64$