Combining Like Terms
2x + 3x
What is 5x
x + 5 = 10
What is x = 5.
2x + 8 = 70
What is x = 31.
The teacher has a bag containing 200 pieces of candy in it. You want to equally distribute the candy among the class. Write an expression the represents how many pieces of candy each student would receive if you had X students in the class.
What is 200/X or two hundred divided by X
A statement that an expression has the same value as another expression. (Has an equal sign)
What is an equation?
4x + 6y - 7z + 2x
What is 6x + 6y - 7z.
x + 10 = 13
What is x = 3
6.6x + 2 = 8.6
What is x = 1.
You are ordering pizza for the class. You plan to order cheese pizzas (C) that cost $5 each and specialty pizzas (S) that cost $10 each. Write an expression to represent the total cost of all of the pizzas you order.
What is 5C + 10S or five times C plus ten times S
A number that can be plugged in for the variable to make a true number statement.
What is a solution?
4(5x - 5)
What is 20x -20
4x = -24
What is x = -6.
2(-5.8 + x) = 14.2
What is x = 12.9.
The speed of an object can be found by taking the distance it travels and dividing it by the time it takes to travel that distance. Let the speed, S, be measured in feet per second. Write an equation to represent the relationship between the three quantities (speed, distance, and time).
What is s=d/t or speed equals distance divided by time?
A letter standing in for an unknown numerical value in an expression or equation.
What is a variable?
3(9 - 2x) + 4x
What is 27 - 2x.
x divided by 8 equals 4
What is x = 32.
0.05x + 0.25(64) = 17.75
What is x = 35.
The St. Louis Zoo keeps 37 big cats. Recently a few species of big cats were transferred to another zoo across the country. The St. Louis Zoo now only keeps 25 big cats. How many big cats were transferred to the other zoo?
What is 12 big cats.
A mathematical or statistical representation of a problem from science, technology, engineering, work, or everyday life, used to solve problems and make decisions.
What is a model?
2x + 6y - 8z -(9 - 2x) - 4y
What is 4x - 2y - 8z - 9.
0.7x = 3.5
What is x = 5.
2000x = 6000
What is x = 3.
Lisa and her sister Erin are saving up to buy a new 3D tv. Lisa has saved up $299.99 in her account. Erin sets aside her weekly allowance of $80 over W weeks to save up for the tv. The tv cost $699.99. How many weeks does Erin need to set aside her allowance to purchase the tv with her sister?
Erin needs to set aside her allowance for 5 weeks.
Something that limits what is possible or reasonable in a situation.
What is a constraint?