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3 years ago

On interchanging two digits of the number 2643, it decreased by 180. Which two digits of 2643 might have been interchanged?

Mathematics

1 answer:

iris [78.8K]3 years ago

8 0

Answer: D. 6 and 4

Explanation:

2643 - 180 = 2463 the 6 changes to a 4, and the 4 changes to a 6.

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On Carries map,Greenville and North valley are 4.5 inches apart.The scale on her map is1 inch = 20 miles. How far is Greenville

Kitty [74]

4.5 • 20 = 90
Greenville is 90 miles from North Valley

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3 years ago

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7nadin3 [17]

Answer:

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3 years ago

How do you graph a solution set of an inequality that only has whole numbers

fomenos

Answer:

Step-by-step explanation:

A solution set is the set of values which satisfy a given inequality. It means, each and every value in the solution set will satisfy the inequality and no other value will satisfy the inequality.

Example:

Solve 2x + 3 ≤ 7, where x is a natural number.

Solution:

2x + 3 ≤ 7

Subtracting 3 from both the sides,

2x ≤ 4

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5 0

3 years ago

13. Write

Bingel [31]

First off, we factor out the expression:

$\displaystyle \large{y = 2 {x}^{2} - 12x + 16} \\ \displaystyle \large{y = 2 ( {x}^{2} - 6x + 8) }$

In the bracket, separate 8 out of the expression.

$\displaystyle \large{y = 2[ ( {x}^{2} - 6x + 8)] }\\ \displaystyle \large{y = 2[ ( {x}^{2} - 6x) + 8]}$

In x^2-6x, find the third term that can make up or convert it to a perfect square form. The third term is 9 because:

$\displaystyle \large{ {(x - 3)}^{2} = {x}^{2} - 6x + 9}$

So we add +9 in x^2-6x.

$\displaystyle \large{y = 2[ ( {x}^{2} - 6x + 9) + 8]}$

Convert the expression in the small bracket to perfect square.

$\displaystyle \large{y = 2[ {(x - 3)}^{2} + 8]}$

Since we add +9 in the small bracket, we have to subtract 8 with 9 as well.

$\displaystyle \large{y = 2[ {(x - 3)}^{2} + 8 - 9]} \\ \displaystyle \large{y = 2[ {(x - 3)}^{2} - 1]}$

Then we distribute 2 in.

$\displaystyle \large{y = 2[ {(x - 3)}^{2} - 1]} \\$

$\displaystyle \large{y = 2[ {(x - 3)}^{2} - 1]} \\ \displaystyle \large{y = [2 \times {(x - 3)}^{2} ]+[ 2 \times ( - 1)] } \\ \displaystyle \large{y = 2 {(x - 3)}^{2} - 2 }$

Remember that negative multiply positive = negative.

Hence the vertex form is y = 2(x-3)^2-2 or first choice.

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3 years ago

Jaye walked 50 dogs this week. 40% of the dogs were brown. How many of the dogs were brown?

RoseWind [281]

Answer: 30

Step-by-step explanation:

50x .4 = 20

50-20=30

7 0

3 years ago

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