Solving Equations
3x = -9
x = -3
x + 8 > -9
x > -17
For every pound of flour you buy, you buy 10 pounds of wheat. If you buy 100 pounds of wheat, how many pounds of flour did you buy.
10 pounds
How much tax will you pay for a $65 coat if your state charges 8% sales tax?
Determine the rate of change for the table
x 2 4 8
y 1 2 16
m = 1/2
4x + 3 = -13
x = -4
2x - 3 > 7
x > 10
Solve for x.
x/ 3 = 10 / 15
x = 2
How much will your total be if your meal comes to $80 and you'd like to leave the waiter a 30% tip?
$104
Give another point on the line that goes through (3,5) and has a slope of 2.
Sample: (7,4)
5 - x/4 = 30
x = -100
5 - x/3 < 2
x < 9
For every 90 light bulbs produced, 2 are defective. If there are 10 defective light bulbs, how many were produced?
450 light bulbs
What will your discount be if the $200 shoes you want are on sale for 25% this week?
$50
All proportional relationships must go through which point?
(0,0)
(x-4) / 3 = 10
x = 34
5 + 2x > 11
Any number greater than 3
A person who is 5 ft tall casts a shadow that is 16 feet. Meanwhile, a flag pole nearby casts a shadow that is 90 feet. How tall is the flag pole?
About 28 feet
How much will you pay for a $1700 that is on sale for 40% off?
$1,020
Give 3 points that fall on the line y = x - 1
Sample:
(4, 3) (5, 4) (10, 9)
5x + (-10 ) = -20 + 5
x = -1
Describe the graph for the solution set of
(x+1) / -4 > 1
a closed circle to the left of -5
On a field trip, there needs to be 2 teachers for every 15 students. How many students can go if there are 10 teachers going?
75
You buy 3 shirts for $40 each, and a bracelet for $12. If there is 7% sales tax, what is your total cost?
$141.24
Is it a proportional relationship if you work for 5 hours and make $30 and then work 10 hours and make $60?
yes, because you make $6/hr in either situation