Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks. Zachary and Valentina are making presentations for a class project. Zachary's slideshow starts with a verbal introduction that is 15 seconds long, and then each slide is left up for 11 seconds. Valentina leaves each slide onscreen for 8 seconds, and her introduction lasts 18 seconds. Zachary and Valentina notice that their presentations have both the same number of slides and the same duration. How many slides are in each presentation? How long is each presentation?

c

step-by-step explanation:

c

i’m here for points.

answer: (1,3) (3,-1) (5,-5) ?

step-by-step explanation:

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