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nlexa [21]
3 years ago
13

Pick a two-digit number greater than 25. Rewrite your two-digit number as a difference of two numbers. Show how to use the ident

ity (x − y)2 = x2 − 2xy + y2 to square your number without using a calculator.
Mathematics
1 answer:
ahrayia [7]3 years ago
5 0

Answer:

Step-by-step explanation:

X = 26 ; y = 27

(x − y)2 = x² − 2xy + y²

(26 - 27)² = 26² - 2(26)(27) + 27²

(-1)² = 676 - 1404 + 729

1 = 1405 - 1404

1 = 1

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11+102 +73 = 186 total killed for ivory = 186 Total killed 19 + 129 + 139 = 287. What percent of the total elephants killed does
Kaylis [27]

Answer:

64.8% of elephants were killed for ivory

Step-by-step explanation:

divide the number of elephants killed for ivory by the total number of elephants killed: 186÷287= 0.6780

multiply your answer by 100 to get a percentage: 0.6780 x 100= 67.8%

4 0
3 years ago
In this exercise, lines m and n are parallel. Find the measure of each numbered angle.
Damm [24]

<u>1 = 62°</u> ( Vertically Opposite Angles )

<u>10 = 62°</u> ( Corresponding Angles )

<u>9 = 10 = 62°</u> ( Vertically Opposite Angles )

<u>6 = 95°</u> ( Vertically Opposite Angles )

<u>7 = 180° - 95° = 85°</u> ( Linear Pair )

<u>8 = 7 = 85°</u> ( Vertically Opposite Angles )

<u>5 = 8 = 85°</u> ( Corresponding Angles )

<u>3 = 5 = 85°</u> ( Vertically Opposite Angles )

4 = 180° - ( 9 + 7 )

4 = 180° - ( 62° + 85° )

4 = 180° - 147°

<u>4 = 33°</u> ( Angle Sum Property )

<u>2 = 4 = 33°</u> ( Vertically Opposite Angles )

5 0
3 years ago
Peter has 360 yards of fencing to enclose a rectangular area. Find the dimensions of the rectangle that maximize the enclosed ar
kap26 [50]
The largest area would be a square with sides 360/4, or 90 yds. each. The area would be 90x90, or 8100 yds². ☺☺☺☺
3 0
3 years ago
Explain the steps to solve 2.15x - 12.18 equals-5.76 and write the solution
tatiyna

Answer:

3.27

Step-by-step explanation:

2.15x= -5.76+12.8

2.15x=7.09

x=7.09/2.15

x=3.27

7 0
4 years ago
What is the solution to this system of equations? x 2 y = 4. 2 x minus 2 y = 5. (3, Negative 5 and one-half) (3, one-half) no so
Talja [164]

The solution of the equation is (3, 1/2).

<h2>We have to determine</h2>

What is the solution to this system of equations?

<h3>According to the question</h3>

The given system of the equation;

\rm x+2y=4\\&#10;\\&#10;2x-2y=5

<h3>The standard form for linear equations in two variables is;</h3>

\rm Ax+By = C

On comparing equation 1 and equation 2 with the standard form we get,

\rm a_1 = 1,\  b_1 = 2,\  c_1=4\\&#10;\\&#10;a_2=2, \ b_2=-2, \ c_1 = 5

Here,

\rm \dfrac{a_1}{a_2}  = \dfrac{1}{2}\\&#10;\\&#10;\dfrac{b_1}{b_2} = \dfrac{-2}{2} = -1\\&#10;\\&#10;\dfrac{a_1}{a_2} \neq \dfrac{b_1}{b_2}

Here,  \rm \dfrac{a_1}{a_2} \neq \dfrac{b_1}{b_2} so, the given system of equations has a unique solution.

Then,

The solution of the equation is;

\rm x+2y=4\\\\2x-2y=5

On adding both the equation;

\rm x+2y+2x-2y=4+5\\&#10;\\&#10;3x=9\\&#10;\\&#10;x = \dfrac{9}{3}\\&#10;\\&#10;x = 3

Substitute the value of x in equation 1,

\rm x+2y=4\\&#10;\\&#10;3+2y = 4\\&#10;\\&#10;2y = 4-3\\&#10;\\&#10;2y=1\\&#10;\\&#10;y =\dfrac{1}{2}

Hence, the solution of the equation is (3, 1/2).

To know more about System of Equation click the link given below.

brainly.com/question/1568892

7 0
3 years ago
Read 2 more answers
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