3 years ago

Can anyone help me on this expression triangle

Mathematics

1 answer:

Sauron [17]3 years ago

5 0

Answer:

3a+7=5a-3

5a-3a=3+7

2a=10

a=5

Again

6b-5=2b+9

6b-2b=5+9

4b=14

b=14/4=7/2

Step-by-step explanation:

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As a water quality assurance employee for your local Aqua America, Inc., branch, you record a drop in water levels from 28 feet

ioda

So, it went down from 28 to 7, meaning 28 - 7 = 21, 21 feet then.

now, if we take 28 to be the 100%, what is 21 off of it in percentage?

$\bf \begin{array}{ccll}
amount&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
28&100\\
21&p
\end{array}\implies \cfrac{28}{21}=\cfrac{100}{p}\implies p=\cfrac{21\cdot 100}{28}$

3 0

3 years ago

Find the lowest number of four digits that can be divided by 22,36,and 42

Anastaziya [24]

Answer:

find the lcm of 22,36,and 42

Step-by-step explanation:

lcm of 22 = 11 x 2

lcm of 36 = 2 x 2 x 3 x 3

lcm of 42 = 2 x 3 x 7

so the lcm of three numbers are 11 x 2 x 2 x 2 x 3 x 3 2 x 3 x 7 = 1000

6 0