Write an expression for the following:
8 less than the sum of two times a number plus 10.
(2n + 10) - 8
5. Given a triangle with the area of 80 sq. feet, find the measure of its base if the height is 20 feet.
8 ft.
What is 18% of 90?
16.2
Five lemons cost $1.80, at this rate, what is the cost of 9 lemons?
$3.24
Simplify:
4(x - 2) + 5(x + 1) - 8
9x - 11
4. Find the circumference of a circle with an area of 379.94 square inches. Use 3.14 for pi
69.08 in
Suppose a certain item used to sell for seventy-five cents a pound, you see that it's been marked up to eighty-one cents a pound. What is the percent increase?
8% increase
A recipe uses 5 cups of flour for every 2 cups of sugar. If I want to make a recipe using 8 cups of flour, how much sugar do I use?
3.2 cups of flour
John plans to run 100 miles to train for the marathon. On Monday he ran 8 miles. Write an expression to show how many more miles John will have to run after running d, days if he runs 4 miles every day.
92 - 4d
Given a trapezoid with a height of 12 yards and an area of 138 sq. yards, what are the lengths of the bases, given that one base is 3 yards longer than the other.
10 yds, 13 yds
Suppose you bought something that was priced at $6.95 and the total bill was $7.61. What is the sales tax rate in this city? Round to the nearest tenths.
9.5%
Rachel reads an average of 40 pages per day. She read 35 pages on the first day, 50 pages on the third day, 48 pages on the fourth day and 38 pages on the fifth day. How many pages did she read on the second day?
29 pages
(b+4)/3 + (b-2)/5
(8b+14)/15
Given that the volume of a cylinder is 251.2 cubic cm with a height of 5 cm. Find surface area. Use 3.14 for pi.
226.08 sq. cm
A job worker received a salary increase of 15%. She currently makes $1,427.50. How much did she make before the salary increase? round to nearest hundredths
$1,243.30
A bus took half an hour to drive from City A to City B at 60 km/h. It then took 2 hours to travel from City C moving at the speed of 70000 m/h. Calculate the average speed of the car for the whole journey.
68 km/hr
(2k+5)/3 - (k+3)/9
(5k+12)/9
Find area and perimeter of the crown. Use 3.14 for pi. 
Perimeter= 58.26 in
Area= 65.61 sq. in
A chemical substance decays with a constant rate of 25% each week. This means that there is 25% less of the substance at the end of each week compared to the amount of substance at the beginning of the same week. What percent of the original amount is left after 3 weeks?
42.4%
The ratio of the number of Sharon's hair clips to the total number of Sharon's and Brittany's hair clips is 3:8. If Brittany has 40 hair clips, how many more hair clips does she have than Sharon?
16 more than Sharon