Equations
Solve:
6x - 10 = -7
x = 1/2 or 0.5
Your meal is $78, and you plan on leaving a 15% tip. Determine, to the nearest cent, the total cost (including tip).
$89.70
The temperature of a local cave changes from 17 degrees to 12 degrees overnight. Determine the percent change, and state whether it is an increase or decrease. Round to the nearest tenth of a percent if necessary.
29.4% decrease
The ratio of cats to dogs is 5:3. The total number of animals is 64. How many are cats?
40 cats
How many ghosts chase Pac-Man at the start of each game?
4
Solve: -4(2x + 8) = 60
Express as a fraction.
x = -23/2 or -11 and 1/2
Sales tax of 8.5% will be applied to an item that is $34.90. Determine the total cost (including the tax) for the item. Round to the nearest cent.
$37.87
Jim invests $3600 at 4% interest for 5 years. Determine the amount of simple interest he would earn on his investment.
$720
What is the circumference of circle with diameter of 10m? Round to the nearest tenth.
31.4 m
What river flows through the Grand Canyon?
The Colorado River
Solve: 3x - 8 = x + 7
Express as a fraction.
x = 15/2 or 7 and 1/2
An item is priced at $123.60. You receive a 15% discount on the item. Sales tax of 5% is then applied to the discounted price. What is the final price? Round to the nearest cent.
$110.31
Rob determines the mass of a rock to be 5.6 grams. The actual mass of the rock is 7 grams. Determine the percent error. Round to the nearest tenth of a percent if necessary.
20% error
Find the volume of a cube with a side length of 4.5 cm. Round to the nearest tenth.
91.1 cubic cm
What is the state bird of NY?
The (Eastern) Bluebird
Solve: -0.2 + 6.1b = 100.45
b = 16.5
A $120 item is taxable. Sales tax is applied and the item will cost $124.80 to purchase. Determine the rate of sales tax.
4%
Jess invests $2300 at 6% interest. After a certain number of years, she has gained $1380 in simple interest. Determine the number of years she invested.
10 years
Two angles are complementary. One of the angles measures 52 degrees. What is the measure of the other angle?
38 degrees
What is the only marsupial native to North America?
Opossum
Solve: 0.1 = 5.5x - 1.4
Round to the nearest tenth.
x = 0.3
$82.57
Compound interest:
$1200 at 6% compounded annually for 2 years.
Determine the value of the account after 2 years.
$1348.32
The equation of a line is y = -4x +7.
What is the slope of this line?
slope - -4
What is the elemental symbol (on the periodic table of elements) for gold?
Au