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xxMikexx [17]
3 years ago
7

1: Find the total cost of 25 pens and 75 books

Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
4 0

Answer:

0.2 x 25 = 5

0.3 x 75=22.5

22.5+5=<u>27.5</u>

Step-by-step explanation:

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Please answer! Explain all steps!
MatroZZZ [7]
We will be using the formulas:
speed=distance/time
time=distance/speed
distance=speed×time
First let's find out Diane's rate of swimming. We can measure this by finding the slope (y/x) of a given coordinate on the graph. One point is (10,15), so you do 15/10=1.5m/s
Now for Rick's rate of swimming, just take a pair of values from the table. 12.5/10=1.25m/s
By the way m/s is metres per second for this
So at a constant speed of 1.5m/s, Diane swam 150m in 150/1.5= 100 seconds, or 1 minute 40 seconds
And at a constant speed of 1.25m/s, Rick swam 150m in 150/1.25= 120 seconds, or 2 minutes.
So the difference between their two times is 20 seconds
7 0
3 years ago
Read 2 more answers
Plz I need help asap i only have 10 mins to answer this.PS-dont tell me yo look it up cuz its not there.
Vsevolod [243]

Answer:

A skateboarder travels down 2 meters a second

Step-by-step explanation:

The slope is 4 / 2 = 2

5 star, thank, and brainliest if helpful!

4 0
3 years ago
Spiral Review:
polet [3.4K]

Answer:

first, how many cups in a gallon. 4 cups/quart, 4 quarts/gallon- 16 cups per gallon

144/16= 9 gallons

6 0
3 years ago
​you are taking a math course in which there will be four​ tests, each worth 100 points. you have scores of 89​, 93​, and 98 on
sergij07 [2.7K]

89+93+98 = 280

360 - 280 = 80 marks is needed for the last test

8 0
3 years ago
-4k^2-8k-3 = -3-5k^2
mel-nik [20]
-4k^2-8k-3 = -3-5k^2 \\ \\ -4k^2 - 8k = -5k^2 \\ \\ 4k^2 + 8k - 5k^2 = 0 \\ \\ -k^2 + 8k = 0 \\ \\ 8k - k^2 = 0 \\ \\ k(8 - k) = 0 \\ \\ k = 0,8 \\ \\

The final result is: k = 0, 8.
8 0
3 years ago
Read 2 more answers
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