Math 1089
12 tulips
Elizabeth planted 4 red tulips to every 3 yellow tulips. If she planted 16 red tulips, how many yellow tulips did she plant?
5
Figure 1: side a=4; side b=x. Figure 2: side a=8; side b=10. Find X.
Cross-multiply
How do you solve a proportion?
240 km
If 1cm = 40 km, what is the actual distance between two cities if on the map they are 6 cm apart?
19.30
If Angle A=25* and side a=9, what is the length of side b? (Rounded to the nearest 100th)
28 dozen donuts
If Karla sold 3 dozen donuts for every 6 dozen cookies, how many donuts did she sell if she sold 84 dozen total?
5
If a=3 and b=4, what is c?
12
If a=9 and c=15, what is b?
Tangent
Opposite/adjacent
Sine
Opposite/hypotenuse
A man that hath friends must shew himself friendly: and there is a friend that sticketh closer than a brother.
Proverbs 18:24
Enlargement
Scale factor greater than 1.
Reduction
Scale factor less than 1.
X = 2
Solve for x: 1/2 / x = 2/8
X = 9
Solve for x: 28/12 = 21/x
X = 5/4
Solve for x: 4/8 = 5/8 / X
X = 21
Solve for x: x/36 = 7/12
Hypotenuse
The longest side of a right triangle.
4/6
The next equivalent ratio for this given ratio: 2/3
6/10
The next equivalent ratio for this given ratio: 3/5
Means
There are two parts to a proportion. The two inside numbers are called what?
Extremes
There are two parts to a proportion. The two outside numbers are called what?
Right triangle
Triangle with one right angle.
Legs
Two shorter sides of a right triangle.
A comparison of two numbers.
What is a ratio?
Numerator
When proportions are not equivalent, the __________of the greater product is the __________of the greater fraction.
1/6
Write ratio in lowest terms: 4 out of 24
12/35
Write this ratio as a fraction: 12:35
4/9
Write this ratio as a fraction: 4 to 9
25
A'B' is 10 and the scale factor is 2/5, what is AB?
4
A'B' is 20; AB is 5. What is the scale factor?
1/2
A'B' is 7; AB is 14. What is the scale factor?
Cosine
Adjacent/hypotenuse
24 in
A train car is approximately 50ft long; how long is a 1/25 scale model in inches?
proportion
An equation formed by two equal ratios.
No
Are these ratios a proportion? 4/3 and 12/15
Yes
Are these ratios a proportion? 5/6 and 150/180