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3 years ago

Help Ratios Picture added!!

Mathematics

1 answer:

tangare [24]3 years ago

3 0

Answer:
25

Explanation:
A : B
4 : 5
20 : 25
Multiply the sides by 5

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8x + 10 + 5x + 6 Combine like terms please

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Answer:

8x+5x+10+6=

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3 years ago

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SOMEONE HELP ME PLEASE ASAP!!!

GrogVix [38]

Answer:

600

Step-by-step explanation:

0+.80x=60+.70x

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3 years ago

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Let assume that $\sqrt7$ is a rational number. Therefore it can be expressed as a fraction $\dfrac{a}{b}$ where $a,b\in\mathbb{Z}$ and $\text{gcd}(a,b)=1$ .

$\sqrt7=\dfrac{a}{b}\\\\7=\dfrac{a^2}{b^2}\\\\a^2=7b^2$

This means that $a^2$ is divisible by 7, and therefore also $a$ is divisible by 7.

So, $a=7k$ where $k\in\mathbb{Z}$

$(7k)^2=7b^2\\\\49k^2=7b^2\\\\7k^2=b^2$

Analogically to $a^2=7b^2$ ------- $b^2$ is divisible by 7 and therefore so is $b$ .

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Therefore $\sqrt7$ is an irrational number.

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4 years ago

A highway runs east-west between two towns C and B that are 25 km apart. Town A lies 15 km directly north from C. A straight roa

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Say the place value as you’re reading

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