For one geometry test fred had to answer 15 questions. of the 15 questions friend answered six of them correctly. what percent did fred get on geometry test? round your answer to the nearest whole number if necessary.

Fred got 40% right.

Step-by-step explanation:

The total number of questions in the geometry test that Fred had to answer is 15.

Of the 15 questions Fred answered six of them correctly.

Therefore, the percent that Fred got on the geometry test would be

The number that he got correctly / the total number if geometry questions × 100

This becomes

6/15 × 100 = 40%

hello!

to begin with, we're given that on earth, a rock weighs 20 pounds, and while on jupiter, that same rock weighs 42 pounds. now, we're trying to find the weight of a rock that weighs 10.5 pounds on earth, on jupiter.

to solve this, first, set up a proportion, cross-multiply, and solve it algebraically.

setting up the proportion is the hardest and the most confusing part of the problem, but it's simple.

if on earth, the rock weighs 20 lbs, and on jupiter it weighs 42 lbs, our first part of our proportion is 20/42 lbs. the second part has to be equal to each other. this means that 10.5 has to be on the numerator of the fraction, and x, the value we're trying to find, has to be on the denominator. remember that the rock weighs 10.5 lbs on earth, and we're trying to find the weight of it on jupiter (which is x).

20/42 = 10.5/x

next, you would cross-multiply.

20x = 42(10.5)

20x = 441

now, solve it algebraically by using division.

x = 22.05 lbs

this can be rounded to 22.1 lbs.

therefore, the weight of the rock on jupiter is 22.1 lbs, the fourth choice.