Your rows would be $0.90 Chocolate, $1.20 Chocolate, and the Total Chocolate Mix, and your columns would be the Amount of Chocolate in #s and the Total Costs
(This is the best I can do coming up with a grid)
________________amt (#)_________total costs
$0.90_____________10______________9.00
$1.20______________x______________1.20x
Total Mix_________10+x_____________9+1.2x
Using this grid, you see that 10+x=9+1.2x so solve for x
10+x -x=9+1.2x -x
10=9+.2x
10 -9=9+.2x -9
1=.2x
1/.2=(.2x)/.2
x=5, so you need 5lbs of the $1.20 chocolate to produce a mixture worth $1.00
I believe the answer is...
2: <u>Negative</u>
Hopefully, this helps you!!
Answer: 1 3/10a+19
Step-by-step explanation:
Ok so first you have to open the parenthesis. Since the sign to the left of both the parenthesis is positive we can just normally open the parenthesis .
We get: 1/2a+12+4/5a+7
We need to convert the denominators of 1/2a and 4/5a so we can add them together
1/2a=5/10a
4/5a=8/10a
Now we can add the a variables together.
5/10a+12+8/10a+7=
13/10a+12+7
Then add 12 and 7 together:
13/10a+19 = 1 3/10a+19
Keep in mind: If the sign to the left of the leftmost parenthesis is negative then the sign inside the parenthesis is negative.
For example when opening this parenthesis: (2+3/x<u>)-(2+3x)</u> the sign is negative so the opening parenthesis is -2-3x.
