The ratio of the cost of one metre of polyester fabric to the cost of one metre of cotton fabric is 2:7
Complete the table of costs

The values of the table of costs in the explanation

Step-by-step explanation:

Let

x ---->the cost of one metre of polyester fabric

y ----> the cost of one metre of cotton fabric

we know that

The ratio of the cost of one metre of polyester fabric to the cost of one metre of cotton fabric is

Complete the table

Part 1) For 2 metres of fabric

To find out the costs multiply the ratio by the fraction 2/2

so

therefore

Part 2) For 6 metres of fabric

To find out the costs multiply the ratio by the fraction 6/6

so

therefore

Part 3) For 8 metres of fabric

To find out the costs multiply the ratio by the fraction 8/8

so

therefore

Part 4) For 9 metres of fabric

To find out the costs multiply the ratio by the fraction 9/9

so

therefore

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: