Please help me finish my homework. Show all work Thanks

Alice travels 4 times as fast as Brenda. Traveling in opposite directions, they are 840 miles apart after 7 hours find their rates of travel.

Alice:_________mph

Brenda__________mph

2) 5x+4y= -3

determine if the given ordered pair (1, -2) satisfies the given equation

3) Find the equation for the line that passes through the point (3, -5) and is parallel to the equation x= -4

4) A student bought a calculator and a text book for a course in algebra. He told his friend the total cost was $115(without tax) and that the calculator cost $25 more than four times the cost of the textbook. What was the cost of each item. Let x= the cost of the calculator and let y= the cost of the textbook

the corresponding modeling system is x+y=115

x=4y+25 solve the system by using the method of substitution

(______, _______)

5)Consider the following system of equations

6x+3y=0

-12x=6y

Determine if the point (1, -2) lies on both of the lines in the system of equations by substituting the ordered pair into both equations

yes/no

6) 3x-3y=18

Determine the slope and Y intercept.

7) 6x+3y=0

-12x=6y

Determine if the point ( 1/2 , -1) lies on both lines in the system of equation by substituting the ordered pair into both equations

yes/no

PLEASE SHOW ALL WORK

feel free to do on notebook paper and attach as pdf :D

thanks so much