Round 636 to the nearest ten

The sum of two numbers is 31. 2/3 of one of the numbers added is equal to 5/8 of the other. find the two numbers

Solve the equation: (3) ^x+4 = (7) ^2x-1

Evaluate the expression 4x^4 y^3 when x=1/5 and y=6

Keisha runs each lap in 8 minutes. she will run less than 7 laps today. what are the possible numbers of minutes she will run today?

Susan is on the swim team. Below are four of her times swimming 100 meters. 23.07 seconds, 22.24 seconds, 23.18 seconds, 22.95 seconds what is the difference between her best times and worst time?

The perimeter of a rectangle is 66 m. the length is 1 m more than three times the width. find the dimensions of the rectangle.

What is the value of the missing exponent in the expression below 523 : 10□ = 52.3

2x+3=x+x+3 Show your work

Based on the lesson, identify the first operation needed to solve the following equation. 2x + 3 = 11

Three different ways you can add the same addends to make 12