Answer:
Step-by-step explanation:
To solve this problem one can use the trigonometric ratios, these ratios are the following,
In this problem, one is given the adjacent side, and is asked to find the opposite side, thus use the function (). Substitute in the given value and solve,
Inverse operations,
Solve,
I would substitute y = x^2
4y^2 -21y+20=0
Answer:
The estimate of the proportion of oil tankers that had spills is 65/211 = 0.308.
Step-by-step explanation:
Proportion of oil tankers that had spills.
Number of tankers with spills divided by the total number of tankers.
In this question:
211 tankers
146 did not have spills, so 211 - 146 = 65 had
Proportion:
The estimate of the proportion of oil tankers that had spills is 65/211 = 0.308.
X<-7
times both sides by 2
2x<-14
add 14 both sides
2x<-14
1. distributive property
2. commutative property (the order of 8x and -24 is swapped)
3. reflexive property ((8-24) = -16; -16 is substituted for 8-24. I prefer "substitution property".)
4. commutative property (the order of 8x and -16 is swapped)
5. distributive property