Algebra
Solve for x:
x^2 -9 = 0
x = 3, -3
The angles of a triangle must add up to:
180
15% of 60
9
A store marks an item up by 25%, then puts it on sale for 20% off. Compared with the original price, what is the final percentage change?
0%
You have two coins that add up to 30 cents, and one of them is not a nickel. What are the two coins?
A quarter and a nickel
(the other coin is not a nickel)
Solve for x:
|2x-5|=9
x = 7,-2
A ladder 13 ft long leans against a wall, with its base 5 ft from the wall. How high up the wall does it reach?
12 ft
144 ÷ 12 × 7
84
You drive for 3 hours at a speed of 40 mph and 2 hours at 60 mph. What is your average speed for the entire trip?
48 mph
A farmer has 17 sheep, and all but 9 die. How many are left?
9
If f(x) = x^2 - 4x + 3, find f(5)
f(5) = 8
Find the volume of a cylinder that has a radius of 3 and height of 10.
90pi or 282.6
25 x 24
600
A basketball player shoots 80% on free throws. Assuming they missed the last five free throws, what is the probability they make the next one.
80%
I am an odd number. Take away one letter and I become even. What number am I?
Seven
If a + b = 10 and a^2 + b^2 = 58, find ab
ab = 21
A triangle has angles in ratio 2:3:4. Find the largest angle.
80 degrees
99 x 36
3564
A car's value depreciates 15% per year. If it's worth $20,000 now, what will it be worth after 2 years?
$14,450
If all cats are mammals, and Whiskers is a cat, what can we conclude?
Whiskers is a mammal
Solve for x: rootx + 6 = x
x = 3
A rectangular box has dimensions 3 × 4 × 12. Find the length of its longest interior diagonal.
13
- Use d = √(3² + 4² + 12²)
(6 × 9) + (40 ÷ 5) x 3² - 127
-1
A population grows 10% per year. Starting at 1,000, approximately how many years until it doubles?
7.3 years (7 or 8 years is correct)
A woman gives a beggar 50 cents. The woman is the beggar's sister, but the beggar is not the woman's brother. How is this possible?
The beggar is her sister