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noname [10]
3 years ago
5

How to use mental math in 56,211 -6,189 ?

Mathematics
1 answer:
Pie3 years ago
3 0

Do what you would normally do on paper and do it in your head

If you need a visual just ask and I'll edit my response and show you on paper

You might be interested in
A buyer of a new sedan can custom order the car by choosing from 5
Alenkinab [10]

Using the Fundamental Counting Theorem, it is found that the buyer has 180 choices.

Fundamental counting theorem:

States that if there are n things, each with n_1, n_2, \cdots, n_n ways to be done, each thing independent of the other, the number of ways they can be done is:

N = n_1 \times n_2 \times \cdots \times n_n

In this question:

  • The options are independent.
  • There are 5 different exterior colors, hence n_1 = 5.
  • There are 3 different interior colors, hence n_2 = 3.
  • There are 2 sound systems, hence n_3 = 2.
  • There are 3 motor designs, hence n_4 = 3.
  • There are 2 transmission options, hence n_5 = 2.

Then:

N = 5 \times 3 \times 2 \times 3 \times 2 = 180

The buyer has 180 choices.

To learn more about the Fundamental Counting Theorem, you can take a look at brainly.com/question/25799621

5 0
2 years ago
Anna invested 2,500 at an annual rate 5%. How long will it take until anna earns 1,125 in interest
ahrayia [7]

9514 1404 393

Answer:

  9 years

Step-by-step explanation:

The simple interest formula is ...

  I = Prt

where I is the interest earned on principal P invested at annual rate r for t years. Solving for t, we have ...

  t = I/(Pr) = 1125/(2500×.05) = 1125/125

  t = 9 . . . . years

It will take 9 years for Anna to earn 1125 in interest.

3 0
3 years ago
Let g be the function given by g(x)=-3x^2-2x+3 evaluate g(-2)
sashaice [31]

g(x) = -3x² - 2x + 3

g(-2) = -3(-2)² - 2(-2) + 3

g(-2) = -12 + 4 + 3 = -5

8 0
3 years ago
In the figure below, the areas of rectangles A, B, and C are 12, 24, and 40, respectively. Find the area of rectangle D.
ser-zykov [4K]

Answer:

In the figure below, the areas of rectangles A, B, and C are 12, 24, and 40, respectively. Find the area of rectangle D.

Step-by-step explanation:

here is the picture:

3 0
3 years ago
What is 3/8 plus 2/6
NeTakaya

Answer:

0.708333333

708333333/1000000000


6 0
4 years ago
Read 2 more answers
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