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vladimir1956 [14]
3 years ago
7

Mary and Roberto bought identical backpacks at different stores. Mary's backpack originally cost $65 and was discounted 25%. Rob

erto's backpack originally cost $75 and was on sale for 30% off of the original price. Which backpack was a better buy?
Mathematics
1 answer:
mihalych1998 [28]3 years ago
8 0

Answer:

Mary's

Step-by-step explanation:

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2) Bobby makes model train sets. Each set requires 1,998 pieces of track. At the Hobby store, there are 37 pieces in each box. a
eimsori [14]

Answer:

You never gave the speed of the blue train. The path to collision is equal to 1½ circles. 1.5 x 210 meters = 315 meters I'm going to arbitrarily guess the speed of the blue train is 15 meters per minute. They are therefore approaching each other at a combined rate of 35 meters per minute. 315 / 35 = 9 minutes Answer: 9 minutes

Step-by-step explanation:

5 0
3 years ago
Could you help me plz
Nadya [2.5K]

Answer:

Step-by-step explanation:

(For a circle)

Circumference formula: π*2r

Area formula: π*r^2

1:

A)

π*2(3) =>6π=>18.84 m

B)

π*(3)^2=>9π=>28.27 m^2

2.

A)

π*2(3.1)=>6.2π=>19.47 m

B)

π*(3.1)^2=>9.61π=>30.19 m^2

6 0
3 years ago
(-15)(-4) help meeee
Hunter-Best [27]

The answer is 60 (wow this was a fast answer wish people answered my questions this fast)

3 0
3 years ago
Read 2 more answers
Will give brainlst <br> Have a nice day
Zarrin [17]

Answer:

ok where are you from which country

5 0
2 years ago
Using an ordered alphabet of 26 letters, how many ways are there to choose a set of six letters such that no two letters in the
mestny [16]
To find our solution, we can start off by creating a string of 27 boxes, all followed by the letters of the alphabet. Underneath the boxes, we can place 6 pairs of boxes and 15 empty boxes.The stars represent the six letters we pick. The empty boxes to the left of the stars provide the "padding" needed to ensure that no two adjacent letters are chosen. We can create this - 
\binom {21} {6}= \frac{21*20*19*18*17*16}{6*5*4*3*2*1} =21*19*17*8=54264
Thus, the answer is that there are \boxed{54264} ways to choose a set of six letters such that no two letters in the set are adjacent in the alphabet. Hope this helped and have a phenomenal New Year! <em>2018</em>
5 0
3 years ago
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