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Ira Lisetskai [31]
3 years ago
10

Dan found 70 seashells, he gave joan some of his seashells. he has 19 seashells left. how many seashells did he give to joan?

Mathematics
1 answer:
MAVERICK [17]3 years ago
5 0
You use subtraction in this operation:
70 seashells - 19 seashells = 51 seashells
Thus, Joan is given 51 seashells.
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Plsssss helppp im so lost on this
Alik [6]

Answer:

2n-4>1n+3

Step-by-step explanation:

So basically 2 times a number go together because it means its multiplying and the greater sign is > and then 1 is multiplying with n so its 1n and then you just add 1

3 0
3 years ago
This question is confusing me
gizmo_the_mogwai [7]

Answer:

She went on the slide 8 times and on the roller coaster 4 times

Step-by-step explanation:

We convert each statements to a mathematical equation.

Firstly, let's represent the number of times she went on the coaster with R and the number of times on the slide with S. We know quite well she went on 12 rides. Hence the summation of both number of times yield 12.

Mathematically, R + S = 12. ........(i)

Now we also know her total wait time was 3hours. Since an hour equals 60 minutes, her total wait time would equal 180 minutes.

To get a mathematical representation for the wait time, we multiply the number of roller coaster rides by 25 and that of the slides by 10.

Mathematically, 25R + 10S = 180 .......(ii)

Here we now have two equations that we can solve simultaneously.

From equation 1 we can say R = 12 - S. We can then substitute this into equation 2 to yield the following:

25(12 - s) + 10s = 180

300 - 25s + 10s = 180

300 - 25s + 10s = 180

300 - 15s = 180

15s = 300 - 180

15s = 120

S = 120/15

S = 8

S = 8 , and R = 12 - S = 12 - 8 = 4

5 0
3 years ago
PLEASEEEE
Jobisdone [24]
<h3>Answer:  9.4 feet</h3>

Work Shown:

sin(angle) = opposite/hypotenuse

sin(22) = x/25

x = 25*sin(22)

x = 9.3651648353978

x = 9.4

Your calculator needs to be in degree mode. One way to check is to compute sin(30) and you should get 0.5 or 1/2.

3 0
2 years ago
What is the similarity between 85,17,19,4 and 2?
Anvisha [2.4K]
You can obtain the a number for which they all divisors by calculating the least common multiple.

This way:

85 = 5*17*1
17=17*1
19=19*1
4=2^2 *1
2=2*1

The least common multiple is: 5*17*19*2^2 = 6,460.

Then 84, 17, 19, 4 and 2 are all divisors of 6,460.
6 0
4 years ago
Human population numbers are in constant flux. Suppose a country has a population of 20 million people at the start of one year
Sati [7]
  • Birth=+600000
  • Death=-350000
  • Immigrants=+100000
  • emigrants=-5000

. Population Change:-

\\ \sf\longmapsto 600000-350000+100000-5000=+350000

Population:-

\\ \sf\longmapsto 2000000+350000=2350000

7 0
3 years ago
Read 2 more answers
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