For being in proportion,
Product of means = Product of extremes
Here,
only pair pair fulfills that
8 : 12 :: 18 : 27
8 × 27 = 12 × 18
216 = 216
The correct answer is (x-3).
An easy way to figure this out is to find two numbers that multiply to -21 and add to 1 (however, make sure you keep in mind the leading coefficient of 2).
The easiest way is to find factors that multiply to the constant term, and then check and see whether the linear variable terms (when multiplied out) add up to the term we see in the quadratic.
Basically, just use a guess and check method by multiplying out your educated “guess” factors.
Hope this helps!
The sales tax is 18 ×
, which is 1.26
The DVD + sales tax is:
18 + 1.26
= 19.26
The total price will be $19.26. She has $20, so she will have enough money
Answer:
domain: (-∞,∞)
range [-3,∞)
Step-by-step explanation:
The domain is the values that x can take
X can be any value so the domain is all real numbers
The range is the values that y can take
The minimum value is -3
The range is y ≥ -3