Answer:
7x - 7
Step-by-step explanation:
Variable: X = the unknown number
2x + (-7) + 5x
= 7x - 7
Step-by-step explanation:
supplementary angles means sum of them is 180°
8x+4+6x+64 = 180
14x+68 = 180
x = 8
angles are 68 and 112
Answer:
2l + 3 = 39
Step-by-step explanation:
Let l = Lindsay's age in years.
Carol's age is three more than two times Lindsay's age
Carol = 2l+3
Carol = 39
39 = 2l+3
Answer:
P=1/65.
Step-by-step explanation:
We knaow that one coin in a collection of 65 has two heads. If a coin, chosen at random from the lot and then tossed, turns up heads 6 times in a row. We calculate the probability that it is the two-headed coin.
We calculate the number of possible combinations:
Number of favorable combinations is 1.
Therefore, the probability is
P=1/65.
10x - 3 = x + 2 + 2x - 1
10x - 3 = 3x + 1
-3x on both sides
7x - 3 = 1
-1 on both sides
7x - 4
(Check 7x - 4 by adding them all up to equal 10x - 3)
x + 2 + 2x - 1 + 7x - 4 = 10x - 3
combine liked terms
10x - 3 = 10x - 3
Answer:
D) 7x - 4
