My friend is obviously wrong. If I'm paying $2.40 for three fourths of a pound, what makes him think that he'll pay less for more grapes? This equation actually doesn't involve any equations.
Answer:
12
Step-by-step explanation:
the number = x
2/3 of x =8
2x/3 = 8
2x= 24
x=12
Answer:
The answer is one.
Step-by-step explanation:
For this case we can propose a rule of three and thus find the original price of the cap.
15% --------------> $2.70
100% ----------> x
Where "x" represents the original price of the baseball hat, that is, without offering a discount:
So, we have the original price of the baseball hat is $18
To find the answer we remove 15% of the total price and have:
Answer:
The full price of the baseball hat is $15,3
Answer:
Step-by-step explanation:
- Let the speed of raft (current) - r
- Speed of motorboat - 12 km/h
- The distance between villages - 44 km
- Let the time spent by Aniskin - t
- The time the thief was in travel = 2 hr 40 min + t = 2 40/60 + t = 3/8 + t
- The distance the thief traveled = 44 - 27 = 17 km
<u>We have following equations:</u>
- r(8/3 + t) = 17
- (12 - r)t = 27
<u>Simplify the equations:</u>
- r(8/3 + t) = 17 ⇒ rt + 8/3r = 17
- (12 - r)t = 27 ⇒ 12t - rt = 27
<u>Add up the equations and solve for r:</u>
- rt + 8/3r + 12t - rt = 44
- 8/3r + 12t = 44
- r = 16.5 - 4.5t
<u>Substitute r into second equation:</u>
- (12 - 16.5 + 4.5t)t = 27
- 4.5t² - 4.5t = 27
- 9t² - 9t - 54 = 0
<u>Solving we get</u>
<u>Find r:</u>
- r = 16.5 - 4.5*3 = 3 km/h