# Chapter9

1)Trains a and B are traveling in the same direction on parallel tracks. Train A is traveling @ 100 miles per hour and train B is traveling @ 120 miles per hour. Train A passes a station @ 1:20pm. If train B passes the same station @ 1:32pm, at what time will train B catch up to train A?

when will train B catch up with train A?

2) What is the solution of the system? Type an ordered pair, Use integers or fractions

3x+ 4y=3

6x+8y=6

3)The width of a rectangle is fixed @ 22cm. what length will make the perimeter greater than 76cm? The length must be greater than ? cm

4)In 1991, life expectancy of males in a certain country was 61.9 years. In 1998, it was 64.5 years. Let E represent the life expectancy in year T and let T represent the number of years since 1991.

The linear function E (t) that fits the data is

E(t)=?t + ? round to the nearest tenth

Use the fraction to predict the life expectancy of males in 2006

E(15)=

round to the nearest tenth

5)The product of 31% and some number, what is the translation ?

type the percentage as a decimal

6)Solve the following system of equations

x+2y=4 (1)

x=3-2y (2)

what is the solution of the system? type an ordered pair or is there a solution

7)Find the slope x=-6

m=? type as an integer or a simplified fraction

8)What is the slope M of (6,2) and (9,-3)=

9)Determine if (2,-9) is a solution of 9x-4y=18

10)Solve for a=9b, for B

11)What is the solution set of 6+7x<62

12)what is the slope of (2,6) (-6,-5)

13)media services charges $40 for a phone and $30/month for its economy plan. The equation c=30t +40 describes the total cost , C. How much will it cost for 10 months of service ?

If there is $110 available, how many months of service can be received?

14)5/4x+1/8x=5/8+x=

15)The function H described by H(x)=2.75x + 71.48 can be used to predict the height in centimeters, of a woman whose humerus is X cm long?

Predict the height of a woman humerus which is 36cm long?

16)7>-4x+6 or 9<-2x+4- solve for compound inequality

17)Graph y=4

18)50% of what number is 10?

19)14m +6n-9m-9n=

20)Graph 3x+4y<12

21)x+y/10 for x=98 and y=2=

22) what is the domain of P? P(x)=x(2) -2x+1

23)Is this pair 2x+5y=1 & 5x+2y=10= perpendicular or parallel or neither

24)What is the domain of g(x)=6/2-9x

25)what is the solution of -4x>1/11=

26)Simplify 7[-33-(62-31)]=

27)What is the outputs for f(x)=3x(2)-4x

f(0)=

f(-1)=

f(2)=

28)what is the solution of the system?Type an ordered pair

5x+2y=-4

x=36-5y

#### Solution Preview

The answer file is attached.

Please input these answers in your answer boxes.

For graphs of functions, plot the points that I have plotted and join them to get the graph.

For ...

#### Solution Summary

The types of ordered pairs are determined. The expert uses integers and fractions. Complete, Neat and Step-by-step Solutions are provided in the attached file.