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2 years ago

For brainiest:):):):):):):):)

Mathematics

2 answers:

fredd [130]2 years ago

5 0

Answer:

Look at the image.

Step-by-step explanation:

$\frac{y}{70}= \frac{20}{100}$

100 × y = 70 × 20

100y = 1400

100y ÷ 100 = 1400 ÷ 100

y = 14

$\frac{92}{y} =\frac{80}{100}$

y × 80 = 92 × 100

80y = 9200

80y ÷ 80 = 9200 ÷ 80

y = 115

$\frac{y}{30}=\frac{40}{100}$

y × 100 = 30 × 40

100y = 1200

100y ÷ 100 = 1200 ÷ 100

y = 12

mrs_skeptik [129]2 years ago

3 0

Answer:

11) to know the 20% of 70$ we need to 70÷100×20 = 14 now the sale price will ne 70-14$ = 56$

12) same 20% of 92= 92÷100×20= 18.4 $ so now original price= 92+18.4 = 110.4

13) same 40% of 30$ = 30÷100×40 = 12$ now selling price = 30-12$= 18$

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