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Scrat [10]
3 years ago
13

If you need to divide 2/3 by 4/5 , why is it easier to use an equation than to use a model?

Mathematics
2 answers:
Marizza181 [45]3 years ago
6 0

Answer:

because you have to use the reciprocal of the second fraction you are dividing

Step-by-step explanation:

Olenka [21]3 years ago
4 0

Answer:

Its is quicker

Step-by-step explanation:

If you were to use a model you would have write the common denominator out instead of multiplying it. Then you would have to write the new numerator for each fraction to then write it down and divide it into other pieces of the model. the equation is much faster and overall easier to save time on a quiz or test

Hope this helps :)

Pls mark brainliest because I really need it

- mastmaster34

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Anit [1.1K]
You have 28 meters of fence to make 3 sides.
28/3 = 9.3333

The pen will be 9.3333 by 9.3333 meters


6 0
3 years ago
Explain how you can use base ten blocks to find 1.54+ 2.37
solong [7]
0.00

*First column to your left - ones column (1)
*Column just after decimal place, in the middle - tenths column (1/10)
*Column to the far right - hundredths column (1/100)

The only numbers that can go in these columns are 0-9.

-------------

1.54 + 2.37 

= (1 + 5/10 + 4/100) + (2 + 3/10 + 7/100)

= 1 + 5/10 + 4/100 + 2 + 3/10 + 7/100

= 3 + 8/10 + 11/100

= 3 + 8/10 + (10/100 + 1/100)

= 3 + 8/10 + (1/10 + 1/100)

= 3 + 8/10 + 1/10 + 1/100

= 3 + 9/10 + 1/100

= 3.91
6 0
3 years ago
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Rus_ich [418]
For number 9 put the equation in the graphing calculator and see what the outcome is
5 0
3 years ago
Ava opens an account with $400. She deposits $200/month for 20 years. The interest rate is 2.15%. How much interest will she hav
artcher [175]

Answer:

  d.  None of the above

Step-by-step explanation:

We assume the sequence of deposits is ...

  month 0: $400

  month 1: $200

  month 2: $200

...

  month 240: $200 . . . . accumulated interest is determined at this point

That is, no interest is earned on the last deposit.

_____

The value of the initial $400 deposit after 20 years at 2.15% interest compounded monthly is ...

  $400×(1 +.0215/12)^(12×20) = $400×1.536666 ≈ $614.67

The value of the $200 annuity at the same interest rate is ...

  $200((1 +.0215/12)^(12×20) -1)/(.0215/12) = $200×299.534612 ≈ $59,906.92

So, the total account value is ...

  $614.67 +59,906.92 = $60521.59

The total amount deposited was ...

  $400 +$200×240 = $48,400

The interest earned is the difference between the account value and the total of deposits:

  $60,521.59 -48,400 = $12,121.59 . . . . interest earned

This value does not match any numerical answer choice, so we conclude the appropriate answer is ...

   None of the above

3 0
3 years ago
Joy needs to mix a 20% acid solution with a 60% acid solution to create 100 millileters of a 28% solution. How many millileters
dalvyx [7]

Answer:

Joy must use 80 milliliters of solution at 20% and 20 milliliters of solution at 60%

Step-by-step explanation:

Let

x -----> milliliters of solution at 20%

y -----> milliliters of solution at 60%

we know that

x+y=100 ----> equation A

20\%=20/100=0.20

60\%=60/100=0.60

28\%=28/100=0.28

so

0.20x+0.60y=0.28(x+y)

0.20x+0.60y=0.28(100)

0.20x+0.60y=28 ----> equation B

Solve the system of equations by graphing

Remember that the solution of the system is the intersection point both graphs

The solution is the point (80,20)

see the attached figure

therefore

Joy must use 80 milliliters of solution at 20% and 20 milliliters of solution at 60%

4 0
3 years ago
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