Operations with Numbers
Round 501.5374 to two decimal places.
501.54
Express 0.08 as a percentage.
8%
Write an algebraic expression for the following: "Four more than twice x."
2x+4
Solve the equation: 1-y/5=2
y=-5
Evaluate 20÷(6×(-4×2)÷(-12)-(-1))
4
Express 2.5% as a decimal number.
0.025
Evaluate b^2-ac when a=4, b=-3 and c=7.
-19
Solve the equation: (3b-6)/2=5
b=16/3
Write 1.075 as a simplified fraction.
43/40
Divide $70 in the ratio 2:7:1 .
$14:$49:$7
Simplify the expression: 24ab ÷ (8ab^2)
3/b
Solve the equation: 3(2m+3)-1-4m=4
m=-2
Evaluate 2 2/3-1 5/6
5/6
It used to take 20 hours to fly to Los Angeles. It now takes 12 hours. What is the percentage decrease in travel time?
40%
Simplify the expression: 10pq^2+3-qp-3pq^2-6pq-9
7pq^2-7pq-6
Solve the equation: -4(x+2)=3(2x+1)
x=-11/10
Evaluate 2 1/4÷1 1/2
3/2
A camera store displays a camera marked at $595 and a lens marked at $380. Sam is offered a discount of 22% if he buys both items. How much will he pay for the camera and lens?
$760.5
Simplify the expression: 2(a+2b)-a(3a-4)
-3a^2+6a+4b
Andrew, Brenda, and Cammi all work part-time at a supermarket. Cammi earns $20 more than Andrew, and Brenda earns $30 less than twice Andrew’s wage. If their total combined wage is $400, find how much each of these workers earns.
Andrew: $102.5
Brenda: $175
Cammi: $122.5