Answer:+6
Step-by-step explanation:
2 times 2z= 4z 2 times 4=8 -2 times 3z= -6z -2 times 10= -20 then after u do the multiplication you do this! step by step! 6z minus 4z= 2z then do -20 minus 8= -12 divided by -2z 1 should be= +6
Answer: 3 1/2
Step-by-step explanation:
Change to common denominator of 6.
2 1/3 = 2 2/6. (Multiply fraction by 3/3 to get 2/6)
Now you can add.
2 2/6
+ 1 1/6
—————
3 3/6
3/6 can be simplified to 1/2 by dividing numerator and denominator by 6.
answer = 3 1/2
Your answer is A. 7.2x10^-5
Answer:
Equation 1: 7x + 2y = 12.8
Equation 2: 6x + 3y = 12
Cost of 1 apple: $1.60
Cost of 1 orange: $0.80
Cost of 1 orange: $Step-by-step explanation:
Let's use the elimination method to solve this
Multiply equation 1 by 3
(7x + 2y = 12.8) x 3 = 21x + 6y = 38.4
Multiply equation 2 by -2
(6x + 3y = 12) x -2 = -12x - 6y = -24
The x terms will cancel each other out
21x + 6y = 38.4
-12x - 6y = -24
9x = 14.4
Divide by sides by 9 to isolate the x variable
9x/9 = 14.4/9
x = 1.6
This means an apple costs $1.60
Plug the new x into one of the original equations to find y; we'll use equation 1
7(1.6) + 2y = 12.8
11.2 + 2y = 12.8
Subtract 11.2 from both sides
11.2 + 2y = 12.8
- 11.2 - 11.2
2y = 1.6
Divide both sides by 2
2y/2 = 1.6/2
y = 0.8
This means an orange costs $0.80
