Chase is trying to calculate the total cost of the T-shirt that he's buying. Since it's on sale, he first found the amount of th
2 answers:
Answer:
He should have subtracted the discount and added the sales tax.
Step-by-step explanation:
Given information is -
The T-shirt is on sale.
Chase first found the amount of the discount and added that to the original price. (This is wrong as discounts are always subtracted from the original price)
Next, he subtracted off the amount of the sales tax. (Sales tax has to be always added to the final amount)
Lets take an example.
Suppose you bought a t shirt that had an original price of $50. It was on $20 discount and the sales tax was 5%. So, total bill will be :
New price = dollars
Sales tax amount = dollars
Total bill = dollars
This is the correct way to calculate.
So, the correct option is -
He should have subtracted the discount and added the sales tax.
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Answer:
y=x+10
y=-2x+1
(see attached picture)
Step-by-step explanation:
The idea of solving a system of equations graphically is taht both graphs cross each other at the same point.
The problem doesn't state so, but we can find the equations of the lines that pass through the desired point by using the point-slope form of the equation and by picking any slope we wish.
The slope-intercept form of a linear equation looks like this:
so let's use the following slopes: and
. Remember, you can pick any slope you wish.
so now we can substitute the provided point (-3,7) and its respective slopes:
y-7=1(x-(-3))
y=x+3+7
y=x+10
this will be our first equation.
y-7=-2(x+3)
y=-2x-6+7
y=-2x+1
so now we can plot the graphs of the given equations.
how to plot them? you can pick any x-value you like and use the provided equatioins to find the corresponding y-value. You plot the two points and build the graph.
Let's take the first equation:
y=x+10
and let's use the x-value x=0. We now substitute that into the equation so we get:
y=0+10
y=10
so now my two ordered pairs are (0,10) and (-3,7) so I can plot them on my graph and connect them with a straight line. (see attached picture.)
and we can follow the same procedure for the second graph.
let's use the x=0 again so we get:
y=-2(0)+1
y=1
so the ordered pairs are: (0,1) and (-3,7)
so we plot them to get our final graph (see attached picture)
Of course, this is one of the ways in which we can solve this problem. Since they are asking us to plot the graphs and not quite finding the equations for the system of equations, you could just draw any two lines you like and the answer would be correct as long as the two lines pass through the same point.
