You can multiply by 12 because to get rid of the fractions all terms should be divided by the LCM (ie the smallest multiple that is exactly divisible by 2, 4 and 3)

Multiples of 3 = 3, 6, 9, 12

Multiples of 4 = 4, 8, 12, 16

Multiples of 2 = 2, 4, 6, 8, 10, 12

Therefore the fractions should be multiplied by 12

5 0

3 years ago

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What is 2/3 - 5/6 divided by 3/4

il63 [147K]

Exact form: -4/9
Decimal form: -0.4

4 0

2 years ago

I need help on question 7 and 8

DanielleElmas [232]

7.
remember
(ab)/(cd)=(a/c)(b/d)
we can split them up
and
(x^m)/(x^n)=x^(m-n)

$\frac{27k^5m^8}{4k^3*9m^2}= \frac{27k^5m^8}{36k^3m^2}=( \frac{27}{36} )( \frac{k^5}{k^3} )( \frac{m^8}{m^2} )$ = $( \frac{3}{4})(k^{5-3})(m^{8-2} )=( \frac{3}{4})(k^2)(m^6 )= \frac{3k^2m^6}{4}$

9.

2 to 3
4(x-1)=15
to
4x-1=15
the distribuutive prperty
a(b-c)=ab-ac
what he did was
a(b-c)=ab-c

he did not distribute the 4 to the -1

4(x-1)+3=18
minus 3
4(x-1)=15
distribute 4 to x and -1
4x-4=15
add 4 to both sides
4x=19
divide by 4
x=19/4

4 0

3 years ago

Population density is the number of people per unit of area. The population density of a certain region is 60 people per square

zvonat [6]

Answer: 1380

<u>Step-by-step explanation:</u>

$\dfrac{60\ people}{km^2}\times 23\ km^2\quad =1380\ people$

7 0

4 years ago

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