Show:
Vocabulary
absolute value
Solving for a variable
proportions
100
a comparison of two quantities by division. a : b
What is a ratio?
100
Solve | x + 2 | = 7
the solution is x = –9, 5
100
A = bh for b
What is b = A/h?
100
A boat travels 432 miles in 54 hours (with a constant speed). How much time will it take traveling 312 miles?
39 hours
200
a statement that two ratios are equivalent such as 1/12 =2/24
What is a proportion?
200
Solve | 2x – 3 | – 4 = 3
the solution is x = –2, 5.
200
P = 2l + 2w for w
What is: (P - 2L)/2 = w?
200
42 lbs of apples cost $252. How many lbs of apples can you get with $222 ?
37 lbs.
300
a ratio of two quantities with different units, such as 34 mi./2 gal.
What is a rate?
300
6 = |-3g|
The solution is 2, -2.
300
Solve A = ( 1/2 )ah – ( 1/2)bh for h
What is 2A/(a - b) = h
300
A car travels 369 miles in 7 hours (with a constant speed). How much time will it take traveling 180 miles?
3 hours
400
This uses a scale to represent an object as smaller or larger than the actual object. A map is and example of this.
What is a scale drawing or scale model?
400
-3 = |w| – 7
The solution is 4, -4
400
-2 = 4r + s Solve for s
What is -4r - 2 = s?
400
A fast typist can type 120 words in 100 seconds. In 180 seconds, how many words could be typed?
What is 216 words?
500
you can solve a proportion for a missing value by using this property. a/b=c/d is solved by finding the product of a x d and b x c.
What is the Cross Products Property?
500
|q| – 3 = 0
The solution is 3, -3.
500
xy - 5 = k , solve for x
What is (k + 5)/y= x ?
500
A company can buy packages of 500 sheets of paper for $4. At that rate, how much paper can be bought for $2000?
What is 250,000 sheets of paper?