Where does that StartFraction ... mess come from? -- I've seen it in other questions.
Comparing that to the general quadratic formula
we see b=-10 (agreeing in both places) a=7 (two places), c=-2
Answer: 7x² - 10x - 2 = 0
Answer: I don't know about the formula, but consider the logic below.
Step-by-step explanation:
Martina = 12
Joey = 0
12 x 3 = 36
36 - 3 = 33
If Joey was 21, Martina would be 33.
Answer:
20
Step-by-step explanation:
if x is 20
6x would be 120
3x would be 60
120 + 60 = 180 which checks out
180 is the degree amount of a straight line
Let f=number of flowers in a vase, then:
5f-16=24 add 16 to both sides
5f=40 divide both sides by 5
f=8
So there were 8 flowers per vase in the beginning.
