Let the percentage be x%,

then,

x% of 80 = 64
$\frac{x}{100} \times 80 = 64 \\ \frac{x}{10} \times 8 = 64 \\ \frac{x}{10} = \frac{64}{8} \\ x = 8 \times 10 = 80 \%$

He has ridden 80% of the total bike course.

!! Hope It Helps !!

6 0

3 years ago

Marvin is buying a watch from his brother

Vladimir79 [104]

Answer:

140 = 40 + 10x

Step-by-step explanation:

The watch is 140 in total. He can pay 40 dollars currently. 10x is the amount of payments there are. How much he can pay with each payment (10x) is unknown so that is why there is the variable.

6 0

3 years ago

In a shipment of 850 widgets, 32 are found to be defective. At this rate, how many defective widgets could be expected in 22,000

Kobotan [32]

You can solve this using fractions, and say that 32/850 are defective. To find the amount of defective widgets out of 22,000, we can then multiply to make the denominator 22,000. To work out what we need to multiply by, we can just do 22,000 ÷ 850 = 25.88. Now if we multiply 32 by 25.88, we get our answer as 828 widgets.

I hope this helps!

3 0

4 years ago

Identify the domain and range of the following relation. 3.7

andrey2020 [161]

<span>Answer: {(3,7),(3,8),(3,-2),(3,4),(3,1)} A.Domain:{3} Range:{-2,1,4,7,8}**** B.Domain:{-2,1,4,7,8}</span>

7 0

4 years ago