Mark and his workout partner are lifting weights together, doing many sets of each exercise. On a certain exercise, Mark is using a 40-pound bar, increasing the amount of weight he lifts by 5 pounds on each set. His partner, meanwhile, started out using a 20-pound bar and is upping the weight by adding 10 pounds on every set. Eventually, Mark and his workout partner will be lifting the same amount, and will take turns using the same barbell. How much weight will they be lifting then?

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graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.

rotation point l

step-by-step explanation:

b). 4320 have a nice day

the speed is   miles per hour > is false

step-by-step explanation:

we know that  

a relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form or

in a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

the graph shown in the figure represent a direct variation

the slope of the line represent the speed

for the point

substitute the values of x and y

the linear equation is equal to

statements

case a) it takes hours to go miles

the statement is true

because

substitute

for

find the value of y in the linear equation

> is correct

case b) the speed is   miles per hour

the statement is false

because the speed is

case c) the unit rate for the trip is

the statement is true

because the speed is equal to the slope of the linear equation

case d) it took minutes to go the first miles

the statement is true

because

substitute

for

find the value of y in the linear equation

> is correct