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olya-2409 [2.1K]
3 years ago
7

Which speed is the fastest? A 18 feet in 20 minutes B 90 feet in 2.5 hours C 20 yards in 1.5 hours D 3 2/3 yards in 15 minutes

Mathematics
1 answer:
Andre45 [30]3 years ago
7 0
To solve, put each answer in terms of ft/min. Do this by converting all distances to feet and times to minutes, the dividing feet by minutes. A) 18/20=9/10 ft/min. B) To get 2.5 hrs to mins, multiply by 60. 2.5*60=150   90/150=3/5 ft/min. C) To get feet from yards, multiply yards by 3. 20*3=60   1.5*60=90   60/90=2/3 ft/min. D) (11/3)*3=11   11/15=11/15 ft/min. Now compare the fractions to determine the largest and fastest is 9/10 ft/min, or A.
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HELP PLZ!!!!!!!!!!!!!!!!!!!!!
Anna35 [415]

Answer:

30

Step-by-step explanation:

9 + 13 = 22

22 + 43 = 65

65 + 55 = 120

120 ÷ 4 = 30

hope this helps

3 0
3 years ago
What is the surface area of the figure 8" 8" 12"
fgiga [73]
First, find the surface area of the bigger sides (there are 4 of them so what you get for one you will multiply by 4)

12 x 8 = 96

96 x 4 = 384

Then find the surface area of the smaller sides ( there are two small sides so multiply your answer by two)

8 x 8 = 64

64 x 2 =128

Then add both together 

128 +384 =  512

Hope this helps :)

3 0
3 years ago
Which value of x makes this sentence true?
mart [117]

Answer:

9/22

Step-by-step explanation:

1/2 + x=10/11

Subtract 1/2 from each side

1/2-1/2 + x=10/11-1/2

x = 10/11 -1/2

Getting a common denominator of 22

x = 10/11*2/2  -1/2 *11/11

x = 20/22 - 11/22

x = 9/22

8 0
3 years ago
Read 2 more answers
Name the property used in n + 0 = 7.
Naya [18.7K]

Answer:

D

Step-by-step explanation:

Zero is the additive identity property.

Hope this helps

-Amelia

8 0
3 years ago
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A plant’s growth rate is observed and recorded for a science experiment. The observer notes that on week 2, the plant is 4 inche
Lina20 [59]

Answer:

y - 13 = 3(x - 5)

Step-by-step explanation:

x represents week and y represents inches. Week 2 and week 5 = 2 to 5 = three number difference. The inches which is 4 and 13 have a 9 inched difference. So like I said week represents x and y represent inches so now u have to find the slope, which would be y/x so replace it with the numbers we got so it would now be 9/3. The simplified version would be 3. So the slope is 3.

Point-slope equation: y-y^1=m(x-x^1), y^1 and x^1 are just some random points on the graph, but since we don't have a graph we can use either week 2 and 4 inches or week 5 and 13 inches because if this were a graph, those would be existing points on the graph. And m is the slope so just replace m with 3. We'll use 5 and 13 so: y - 13 = 3(x - 5)

side note: kinda took a long time sorry haha, I had to refresh my knowledge on point-slope equations since it's been a long time since i learned it.

5 0
3 years ago
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