Out of the 21 students in Mrs. Clark's class, 3/7 of the class are boys and 4/7 of the class are girls. How many students in the class are girls and how many are boys?

What is: increase 160 by 30%

What is 2-2x greater than negative 20?

1 and 1/4 divided by 1/8.

Write - 2i + (9 - 3i) - (6 - 10i) as a complex number in standard form.

What times what equals 57

Write the equation of the line whose slope is 1/3 and y-intercept is - 3. Write the answer in slope-intercept form.

Last week, Rick's Math Website had the following number of visitors: Monday = 250, Tuesday = 501, Wednesday = 260, Thursday = 490 and Friday = 711. About how many visitors came to Rick's Math Web last week?

For each cost function (given in dollars), find (a) the cost, average cost, and marginal cost at a production level of 1000units; (b) the production level that will minimize the averagecost; and c) the minimum average cost.

The sum of three numbers is 6. the third number is the sum of the first and second numbers. the first number is one more than the third number. Find the numbers

What is the final amount if 975 is increased by 1% followed by a further 9% increase? Give your answer rounded to 2 DP.