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4 years ago

How to do ratio questions

Mathematics

1 answer:

Gre4nikov [31]4 years ago

5 0

Answer:

First you need to identify what the known ratio and and the unknown one

Then you need to setup the proportion.

After that cross multiply and then solve

Lastly check your answer by plugging the result into the unknown ratio and you should get your answer.

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Evaluate the expression 2m + n for m = 10 and n = 8.

Eduardwww [97]

2m + n
2(10) + 8
the answer is 28

3 0

4 years ago

When do we use d=(x2-x1)+(y2-y1)

stiks02 [169]

Answer:

to find the distance between two points on a coordinate plane

Step-by-step explanation:

yes

8 0

2 years ago

Hi please i nedd help with these questions .

Vlad1618 [11]

Answer:

Step-by-step explanation:

#1:

$\frac{18m^2u}{16n^3v^2} \div \frac{24m}{15nu^3}*\frac{8n^2v^3}{30m^3u}$

division sign means that we flip the fraction

$\frac{18m^2u}{16n^3v^2} * \frac{15nu^3}{24m}*\frac{8n^2v^3}{30m^3u}$

now we can multiply all the constants together and all variables

$m: (m^2)/(m*m^4) = (m^2)/(m^4) = 1/(m^2)\\u: (u * u^3)/(u) = (u^4)/(u) = u^3\\n: (n*n^2)/(n^3) = 1\\v: (v^3) / (v^2) = v\\(18*15*8)/(16*24*30) = \frac{3}{16}$

now we can combine all the parts

$\frac{3u^3v}{16m^2}$

#2:

$\frac{24a^2b^3c}{9bc^3}\div\frac{4a^5bc^3}{27a^3b^2c}$

$\frac{24a^2b^3c}{9bc^3}*\frac{27a^3b^2c}{4a^5bc^3}$

$a: (a^2 * a^3)/(a^5) = 1\\b: (b^3 *b^2)/(b*b) = b^3\\c: (c*c)/(c^3*c^3)= 1/(c^4)\\(24*27)/(9*4)= 18$

$\frac{18b^3}{c^4}$

3 0

3 years ago

Read 2 more answers

What is the value of 36x - 8y2 when x= 3 y = -6

Anna11 [10]

Answer:

-180

Step-by-step explanation:

Plug 3 in for x and -6 for y.

36(3) – 8(-6)²

108 – 288 = ‐180

7 0

3 years ago

Simplify the expression:<br><br> 1.8-8.8g+7g+10.4+5.3g

worty [1.4K]

3.5g+12.2 is the simplified expression I believe

7 0

3 years ago