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OleMash [197]
3 years ago
12

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

Mathematics
1 answer:
Artyom0805 [142]3 years ago
5 0
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
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Determine if the situation described in each row can be represented by 9x+3=21 or by 3x+9=21. Select the correct answer in each
grin007 [14]

Selina gave 2 stickers to each of her friends.

Robert bought 4 bottles of paint.

<h3>What is a numerical expression?</h3>

A numerical expression is a mathematical statement written in the form of numbers and unknown variables. We can form numerical expressions from statements.

Given, Selina had 21 stickers. She gave the same amount of stickers to each of her 9 friends and had 3 stickers left over.

This can be represented as,

9x + 3 = 21.

9x = 18.

x = 2.

So, she gave 2 stickers to each of her friends.

Robert went to an art supply store.

He got a pack of paintbrushes for $9 and some bottles of paint for $3 each.

His total came out to $21, before tax.

3x + 9 = 21.

3x = 12.

x = 4.

Robert bought 4 bottles of paint.

learn more about numerical expression here :

brainly.com/question/29199574

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4 0
1 year ago
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Digiron [165]

Answer:

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3 0
2 years ago
I need help finding this missing angle
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Answer:

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5 0
3 years ago
Is a vertical line perpendicular to the x-axis
borishaifa [10]
A vertical line is perpendicular to the x-axis because they would intersect to form a 90 degree angle.
5 0
3 years ago
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What is the value of z?
weqwewe [10]

Answer:

z = 30.45 feet

Step-by-step explanation:

The volume (V) of a triangular prism is calculated as

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Here V = 913.5 and length = 15, thus

A × 15 = 913.5 ( divide both sides by 15 )

A = 60.9 ft²

The area of the triangle = \frac{1}{2} bh ( b is the base and h the height ), thus

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2z = 60.9 ( divide both sides by 2 )

z = 30.45

3 0
3 years ago
Read 2 more answers
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