3 years ago

How to show the ratio 3:8 is equal to 12:32

Mathematics

2 answers:

uysha [10]3 years ago

4 0

$3:8=\dfrac{3}{8}=\dfrac{3\cdot4}{8\cdot4}=\dfrac{12}{32}=12:32\\\\3:8=12:32$

Agata [3.3K]3 years ago

3 0

12:32 is simply 3:8 but divided by 4 to both sides.

You might be interested in

A rectangle has a length that is 4 units longer than the width. If the width is increased by 7 units and the length increased by

Savatey [412]

Answer:

A = (x + 7)(x + 9)

Step-by-step explanation:

Let the width w = x

then length l = w + 4 = x + 4

Area = length x width

= x(x+4)

Then the the width is increased by 7 units and the length increased by 5 units.

w = x + 7

l = (x + 4) + 5 =x + 9

A = (x + 7)(x + 9)

5 0

3 years ago

Read 2 more answers

Please help me answer questions 48 and 48 with the working out please. This is very urgent and i’m giving out 8 points not 5!!!

mariarad [96]

Answer: 65°

Step-by-step explanation:

$E=w(t_f-t_o)\\\\E: 10\ cubic\ feet\times \dfrac{1000\ BTU}{1\ cubic\ foot}\times \ 60\%\quad \rightarrow \quad E=6000\ BTU\\\\\\w:50\ gallons\times \dfrac{8\ pounds}{1\ gallon}\quad \rightarrow \quad w=400\ pounds\\\\\\\\E=w(t_f-t_o)\\\\6000=400(t_f-50)\\\\\dfrac{6000}{400}=\dfrac{400(t_f-50)}{400}\\\\.\quad 15=t_f-50\\\\\\.\quad 15=t_f-50\\.\ \underline{+50}\quad \underline{\quad \ +50}\\.\quad 65=t_f$