You need to isolate either X or Y
For the first problem I decided to isolate the X
I moved the Y and -2 over to the other side of the equal sign. this makes their positive or negative values to turn the opposite. Heres how this looks
5x=-3y-4+2
I then add both the 2 and -4 together to get -2. this is how that would look like
5x=-3y-2
I now have to divide everything by 5 so i can have X by itself. this is what X equals
5/5X= -3/5y-2/5
x=-3/5y-2/5
Now we go back to the problem but we implement the bolded instead of there being an X. This is how that would look like
5(-3/5y-2/5)+3y-2=-4
then I multiply the bolded by 5.
-3y-2+3y-2=-4
from here I just add
-4=-4
I then go back to the original problem and implement the -4 into the Y
5x+3(-4)-2=-4
Solve for x
5x-12-2=-4
5x-14=-4
5x=10
from here we isolate the x by dividing by 5
5/5x=10/5
this leaves us with
x=2
y=-4
To check our answer we imput those into their correct positions. this is how it would look like
5(2)+3(-4)-2=-4
10-12-2=-4
10-14=-4
-4=-4
When both equal the same we know this is True and with that we know the answers are correct. Ill let you try the other 2 so you can get some practice in. (ps. they are easier than the first one)
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Answer:a
Step-by-step explanation:
becaus it is i took the test
The initial cost of each jar of grape jam is calculated by dividing the cost of one case by the number of jar in each case. That is,
cost per jar = $7.20 / 12
cost per jar = $0.6
The mark-up is calculated by dividing the difference of the new cost and the previous cost by the previous cost.
mark up = (($0.89 - $0.6) / $0.6) x 100% = 32.58%.
The answer is C.
-5 is an integer because integers are all whole numbers with the inclusion of their opposites (negative values).
-5 is rational because it can be expressed as a ratio of two integers (-5/1).
-5 is a real number because all integers and rational numbers are real numbers.
Answer:
Step-by-step explanation:
1/3 x (15 +6) = 1/3 x 21
1/3 x 21 can be translated into 21 divided by three
∴ 1/3 x 21 = 7