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2 years ago

Write an expression that shows how you can multiply 9 x 475 using expanded form and distributed property

Mathematics

2 answers:

Andru [333]2 years ago

8 0

You can do this 475+475+475+475+475+475+475+475+475

Leviafan [203]2 years ago

6 0

475 = 400 + 70 + 5

therefore

9 × 475 = 9 × (400 +70 + 5) = 9 × 400 + 9 × 70 + 9 × 5
=3600 + 630 + 45 = 4275

I think... It's better to use Distributive Property:
(a - b) × c = a × c - b × c

9 = 10 - 1

therefore:
<span>(10 - 1) ×475 = 10 × 475 - 1 × 475 = 4750 - 475 = 4275</span>

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A staircase has 105 blocks, how many stairs does it have?

lesya692 [45]

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here is a spreadsheet to help you understand the stair problem notice for 1 step 1 block, 2 step, 3 block, 3 step, 6 block and so on notice the blocks for the number of a step is that step plus all the other blocks needed to make all the one(s) below it. Notice it takes 105 blocks to make 14 steps.
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2 years ago

What is the value of x <br> (X+40) (3x) <br> A. 20<br> B. 35<br> C. 60<br> D. 70

shtirl [24]

Answer: A. 20 is the answer.

Step-by-step explanation:

x+40 = 3x

or, 40 = 3x-x

or, 2x = 40

or, x = 40/2

so, x = 20

4 0

2 years ago

What is a rational number? Give examples

sergeinik [125]

Answer:

They can be expressed as fractions. > web's answer a rational number is any number that can be expressed as the quotient or fraction p/q of two integers, a numerator p and a non-zero denominator q. Since q may be equal to 1, every integer is a rational number.

Step-by-step explanation:

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2 years ago

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kiruha [24]

Answer:

i did this before xD

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2 years ago

Type 4 points found on the circumference of the following equation. Exact points only, no approximations.

sergey [27]

The points on the circumference are (3, 5), (3, -9), (8, -2 + √24) and (8, -2 - √24))

<h3>How to determine the points on the circumference of the circle?</h3>

The circle equation is given as:

(x-3)^2 +(y+2)^2= 49

Rewrite as:

(y+2)^2= 49 -(x-3)^2

Take the square root of both sides

y+2= ±√[49 -(x-3)^2]

Subtract 2 from both sides

y = -2 ± √[49 -(x-3)^2]

Next, we determine the points

Set x = 3

y = -2 ± √[49 -(3-3)^2]

Evaluate

y = -2 ± 7

Solve

y = 5 and y = -9

So, we have

(x, y) = (3, 5) and (3, -9)

Set x = 8

y = -2 ± √[49 -(8-3)^2]

Evaluate

y = -2 ± √24

Solve

y = -2 - √24 and y = -2 + √24

So, we have

(x, y) = (8, -2 + √24) and (8, -2 - √24)

Hence, the points on the circumference are (3, 5), (3, -9), (8, -2 + √24) and (8, -2 - √24)