I’m guessing you subtract 78-52 then divide by original which was 52.. so July is 50% warmer.
I think it is A because you have to do the math
Answer:
The answer is c
Step-by-step explanation:
Answer:
b>1
Step-by-step explanation:
12-3b<9
-3b<9-12
-3b<-3
b>1
Answer: one CD cost $12 and one DVD cost $15 .
Step-by-step explanation:
In this situation we will represent the cost o one CD by x and the number of one DVD by y. Four CDs plus five DVDs cost 123 so we will represent it by the equation 4x + 5y = 123
The same or the second part of the statement. 2 CDs plus 4 DVDs cost $84 so we will also represent that by the equation , 2x + 4y = 84
Since we have two equations we will use it to solve or x and y using the elimination method.
4x + 5y = 123
2x + 4y = 84 Multiply the down equation by -2 to eliminate the x variable.
-2(2x + 4y ) = -2(84)
-4x -8y = -168
We will now have the new equations ,
4x + 5y = 123
-4x - 8y = -168 Add both equations to
-3y = -45
y= 15
This means each DVD cost $15 .
Now we will now have to solve for x by plotting in the value of y into the equation .
4x + 5(15) = 123
4x + 75 = 123
-75 -75
4x = 48
x = 12
This also means that one CD cost $12.
