Answer:
Ratio = =
Step-by-step explanation:
The perfect squares from 1-30 are:
1, 4, 9, 16, 25
Total no. of perfect squares = five =5
Total no. of non perfect squares = 30-5 = 25
Ratio = = 5 / 25 =
Answer:
D
Step-by-step explanation:
This question is written very poorly because it is hard to know what x represents, as well as the end equation. I have come to the conclusion that x represents the amount of days and the end equation represents the exact same equation given (as it asks to rewrite the equation)
So, it is obvious that only one equation matches the one given -- as (1.03)^7 is approximately 1.23, which is close enough to 1.25 (compared to the other options), D is our answer
A and B have both 1.25^7 = around 4.77 (480% ish), and C has 1.03^x, which is not very close to 1.25
Part A: Write equations to represent Company A and Company B's total charges for cleaning to certain carpet area in a day. Define the variable used in the equations. (4 points)
First we define the variables:
x = square foot of carpet area
y = price in $
We now write the equations for each company:
Company A:
y = 0.40x + 22
Company B:
y = 0.60x + 18
Answer:
Company A:
y = 0.40x + 22
Company B:
y = 0.60x + 18
Part B: Which company would charge less for cleaning? 500 square feet of carpet area? Justify your answer. (3 points)
We use the contracted equations in part A and substitute x = 500
We have then:
Company A:
y = 0.40 * (500) +22
y = 222 $
Company B:
y = 0.60x + 18
y = 0.60 * (500) +18
y = $ 318
Answer:
company A would charge less for cleaning 500 square feet of carpet area
Part C: How much money is saved by using the services of Company A instead of Company B for cleaning 200 square feet of carpet area? (3 points)
Company A:
y = 0.40 * (200) +22
y = $ 102
Company B:
y = 0.60x + 18
y = 0.60 * (200) +18
y = $ 138
Then,
138-102 = 36 $
Answer:
is saved about 36 $ by using the services of Company A instead of Company B for cleaning 200 square feet of carpet area
Answer:
2/3
Step-by-step explanation:
Answer: $3.30
Explanation:
You set up a proportion where
9.25 X
------ = -----
2.8 1
Then you cross multiply and see that...
2.8X = 9.25
Then X = 9.25 / 2.8 = 3.30