First solve for x in the first equation
x + 7y = 0
x = -7y
since x = -7y we can substitute -7y into the other equation wherever there is an x
2x - 8y = 22
2(-7y) - 8y = 22
-14y - 8y = 22
-22y = 22
y = -1
Now let's substitute -1 back into either of the original equations so we can solve for x
x + 7y = 0
x + 7(-1) = 0
x - 7 = 0
x = 7
So your solution set is
(7, -1)
Answer:
9
Step-by-step explanation:
9
From 11 A.M. to 2 P.M. because that is when the line is constantly straight
Hi!
In math, anything that is just grouped together with a bunch of different numbers, operators, or symbols is an expression.
By numbers, I mean your usual 1, 2, 3, 4, 5, 6, 7, 8, 9, etc.
By operators, I mean the operators we use to do calculations with. This will be multiplication, division, addition, and subtraction.
By symbols, I just mean any ol' symbol we can shove in there. This can be pi or stuff such as the actual symbols for our operators. (*, /, +, -). Some more examples would be parentheses and inequality symbols.
So, let's make our own expression.
5 + 9x - (-2x)^2 is in fact an expression! We have numbers, operators, and some symbols.
Also, note that variables are really common in expressions. Don't let them mess you up.
With this new found knowledge, you can answer this question on your own!
Hopefully, this helps! =)
Answer:
40 comic books
Step-by-step explanation:
well i dont see a graph but i can give you x, the number of comic books he can buy!
so if he must have a minimum balance of $12 and right now he has $72 then we subtract those and see how much money he has to spend
so that gives us $60 to spend on the comic books
so if each comic book costs $1.50 then we divide that into the $60 leaving us with
40 comic books that jon can buy!
