The picture is a bit blurry but the perimeter of a shape is the lengths added.
(4a - 2b) + (7a + 3) + (9a - 4) = perimeter, I added the sides together
Combine like terms to get:
4a + 7a + 9a = 20a
-2b is left along becuase there are no other like terms
3 - 4 = -1
The perimeter is 20a - 2b - 1
Answer:
430
Step-by-step explanation:
20/100 =5
86 times 5
Let y= years ago when dad's age was 4 times son's age
60-y=4(30-y)
60-y=120-4y
-y+4y=120-60
3y=60
y=60/3
y= 20 years ago
Then 30-20= 10 yrs. old, the boys age when his dad was 40 years old.
Answer:
Answer is B
Step-by-step explanation: divide 120, 240, and 360 by each possible answer. then from the answers that dont leave a remainder, divide it by 160 and 320 and choose the answer that gives you a remainder for both
Add take away 5 from -15. And that leaves you with -20=4m. Then divide by -4 and your answer should be =5+m.