Let the triangle be abc with equal sides ab,bc and ca
then perimeter = 3 ab = 12a + 18b
ab = = 4a + 6b ( each side will have this length)
Now since qr is a mid segment it will be = half length of ab
So qr = 2a + 3b Answer
Answer:
Step-by-step explanation:
( 4y - 9) - 7 = 4y (-9 - 7)
this is the associative property of addition
Answer:
A, B, and C
Step-by-step explanation:
Let's simply the equation first
- -2(-8 - 4y + 3/4)
- 16 + 8y - 1 1/2
What did Daniel do wrong?
Well, let's break down what I did and compare it to Daniel.
- <em>I multiplied -2 and -8x to get 16x. A negative number times a negative number is positive, and 2 times 8 is 16</em>
Daniel, on the other hand, added the two terms.
The first term should be positive (A)
- <em>I multiplied -2 and -4y to get 8y. The same sign rules apply.</em>
Daniel got a negative number, but it is supposed to be positive (B)
- <em>I multiplied -2 and 3/4 should be -6/4, which simplifies to -1 2/4 which is further reduced to -1 1/2</em>
Daniel multiplied and simplified incorrectly (C)
-Chetan K