total cons of the 6 books and 7 pens is rupees 79 and the total cost of 7 book and six pen is rupees 77 find the cost of one book and two pen

guidance

Step-by-step explanation:

divide the amount by the total cost to get cost per product and add it until you find the amount!

b) 36

step-by-step explanation:

18 times 2 is 36

to plot points   for x just start at the origin (middle) and go to the left however many times it say(if the number is a positive) if the number is a negative then go right however many times it says if it is 0 go nowhere

now keep you pencil there and go up however many times it says on y(if it is positive) if it is negative then go down however many times it says. if it says 0 go nowhere.

you have just plotted a point! now when you finish plotting all of them connect them with a ruler

plot each point as (-3, 7), (0,4), (3,1), (8,-4)   in the parenthesis on the left of the comma is x and the right is y.