Download 2.4 Money/Geometry Word Problems

2.4 Money/Geometry
Word Problems
Money Talks
• At the end of the day, a cashier has 26
coins consisting of dimes and half dollars.
The total value of these coins was $8.60.
How many of each type did the cashier
have?
Dime
Half Dollar
Total
#
Value
x
.1
26-x
26
.5
Total Value
.1x
.5(26-x)
8.60
.1x+.5(26-x)=8.6
.1x+13-.5x=8.6
-.4x+13=8.6
-.4x=-4.4
X=11
11 dimes
15 half dollars
Angles of Triangle
• Sum of angles of a triangle is 180 degrees
• EX4) A surveyor maps land in the form of a
triangle. The 2nd angle of the triangle is 21
degrees greater than the 1st. The 3rd is 11 more
than twice the first. What are the three angles?
Let x=1st angle, x+21=2nd, 2x+11=3rd
x+x+21+2x+11=180
x
4x+32=180
4x=148
X=37
X+21
2x+11
1st is 37, 2nd is 58, and the third is 85
Homework
Pg. 95:7-14,27-30,35-38