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babunello [35]
2 years ago
11

. A science class starts an experiment with

Mathematics
1 answer:
vesna_86 [32]2 years ago
3 0

Answer:

  • See below

Step-by-step explanation:

<u>Plant A growth over 2 weeks:</u>

  • 23.5 cm - 2.5 cm = 21 cm

<u>Average rate of change after 2 weeks or 14 days:</u>

  • 21/14 = 1.5 cm per day

<u>If you need it in inches, then convert as below:</u>

  • 1.5 cm = 1.5 * 1/2.54 in = 1.5/2.54 in = 0.59 in per day (rounded0
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Pamela is 10 years older than Jiri. the sum of their ages is 76. what is jiri age
loris [4]

Answer:

jiri's age is 66 years old

Step-by-step explanation:

76-10= 66 years old

4 0
3 years ago
Flying against the wind, an airplane travels 3060 kilometers in 3 hours. Flying with the wind, the same plane travels 7560 kilom
cluponka [151]

Answer:

The speed of plane against wind S 1 = 1020 kmph     And

The speed of plane with wind S 2      = 1260 kmph

Step-by-step explanation:

Given as :

The distance of airplane against the wind = D 1 = 3060 km

The time taken in against the wind             = T 1 = 3 hours

The distance of airplane with the wind       = D 2 = 7560 km

The time taken in with the wind                   = T 2 = 6 hours

Now, Speed of plane against the wind = \frac{Distance}{Time}

So,  S 1 =  \frac{D 1}{T 1}

Or,   S 1 =  \frac{3060}{3} = 1020 kmph

Similarly

Speed of plane with the wind    = \frac{Distance}{Time}

Or,    S 2 =  \frac{D 2}{T 2}

Or,     S 2 =  \frac{7560}{6} = 1260 kmph

Hence The speed of plane against wind S 1 = 1020 kmph     And

            The speed of plane with wind S 2      = 1260 kmph   Answer

8 0
4 years ago
Please help for 18 n 19
Hitman42 [59]
18. \ \ \frac{-1}{x-9}- \frac{-2}{x+7}= \frac{-1(x+7)+2(x-9)}{(x-9)(x+7)}= \frac{-x-7+2x-18}{(x-9)(x+7)}= \frac{x-25}{(x-9)(x+7)}


\frac{2}{x}+ \frac{12}{x}=7 \\    \\  \frac{14}{x} =7 \\  \\ x= \frac{14}{7} \\  \\ x=2
7 0
3 years ago
Your school wants to have 5 computers for every 12 students. There are now 125 computers and 924 students. How many more compute
skad [1K]
You can first set up a ratio to see how many TOTAL computers are needed for a r to 12 ratio.
(5/12) = (x/924) Now cross multiply to solve. 12x = 5(924) 12x = 4620
Divide both sides by 12. x = 385
There are a total of 385 computers needed for the school to have a 5:12 ratio.
Since the school already has 125 computers subtract 385-125 = 260. They need to purchase 260 more computers.
7 0
3 years ago
Read 2 more answers
What is the unit ratio for a button of 16 grams and 2 milliliters?
Reika [66]

Answer:

The unit ratio would be 8 grams per milliliters

Step-by-step explanation:

Since, the unit ratio is a fraction with denominator 1,

In other words, the amount of one quantity in unit amount of other quantity is called unit rate or unit ratio.

Here, the amount first quantity = 16 grams,

The amount of second quantity = 2 milliliters,

Thus, unit ratio = \frac{\text{First quantity}}{\text{Second quantity }}

=\frac{16}{2} = 8 grams per milliliters

6 0
3 years ago
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