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3 years ago

I need help with these questions.

Mathematics

1 answer:

RSB [31]3 years ago

8 0

Answer:

Question 1

<u>Given</u>

SP = 144
P = 20%
CP = x

<u>Use formula and solve for x:</u>

SP = CP + P
144 = x + (20% of x)
144 = x + 0.2x
144 = 1.2x
x = 144/1.2
x = 120

Cost price is N 120

Question 2

<u>Given</u>

SP = 1000
P = -20% (negative because of loss)
CP = x

<u>Use formula and solve for x:</u>

SP = CP + P
10000 = x - (20% of x)
10000 = x - 0.2x
10000 = 0.8x
x = 10000/0.8
x = 12500

Cost is N 12500

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<h2>Hello!</h2>

The answers are:

$\frac{5}{6}$ and $\frac{10}{12}$

$\frac{6}{7}$ and $1\frac{5}{7}$

To find which of the following pairs of numbers contains like fractions, we must remember that like fractions are the fractions that share the same denominator.

We are given two fractions that are like fractions. Those fractions are:

Option A.

$\frac{5}{6}$ and $\frac{10}{12}$

We have that:

$\frac{10}{12}=\frac{5}{6}$

So, we have that the pairs of numbers

$\frac{5}{6}$

and

$\frac{5}{6}$

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Option D.

$\frac{6}{7}$ and $1\frac{5}{7}$

We have that:

$1\frac{5}{7}=1+\frac{5}{7}=\frac{7+5}{7}=\frac{12}{7}$

So, we have that the pair of numbers

$\frac{6}{7}$

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$\frac{12}{7}$

Share the same denominator, which is equal to 7, so, the pairs of numbers constains like fractions.

Also, we have that the other given options are not like fractions since both pairs of numbers do not share the same denominator.

The other options are:

$\frac{3}{2},\frac{2}{3}$

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We can see that both pairs of numbers do not share the same denominator so, they do not contain like fractions.

Hence, the answers are:

$\frac{5}{6}$ and $\frac{10}{12}$

$\frac{6}{7}$ and $1\frac{5}{7}$

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