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Lunna [17]
3 years ago
11

Perform the indicated operation.

Mathematics
2 answers:
kirza4 [7]3 years ago
7 0

Step-by-step explanation:

1st.

(7x+2×2-6x-4) - (2x+3×2-3x+11)

(7x+4-6x-4)-(2x+6-3x+11)

collect like terms

(7x-6x-4+4)-(2x-3x+11+6)

(x+0)-(-x+17)

multiply - by the bracket

x+0+x-17

collect like terms

x+x+0-17

2x-17=0

2x=17

divide both sides by the coefficient of x

2x/2=17/2

x=17/2

Ivanshal [37]3 years ago
5 0

Answer Solution:4x2 - 2x) - (-5x2 - 8x)

4x2 - 2x) - (-5x2 - 8x)= 4x2 - 2x + 5x2 + 8x.

4x2 - 2x) - (-5x2 - 8x)= 4x2 - 2x + 5x2 + 8x.= 4x2 + 5x2 - 2x + 8x.

4x2 - 2x) - (-5x2 - 8x)= 4x2 - 2x + 5x2 + 8x.= 4x2 + 5x2 - 2x + 8x.= 9x2 + 6x.

but this is the answer = 3x(3x + 2).

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C. all four angles are congruent, and opposite sides are congruent for a horizontal and vertical line of reflection

Step-by-step explanation:

A. isn't correct because all four sides aren't congruent, only the pair of opposite sides are congruent. Sense only opposite side are congruent you can only reflect the opposite sides onto each other and not diagonally meaning B. and D. are incorrect leaving C. all four angles are congruent, and opposite sides are congruent for a horizontal and vertical line of reflection as the correct answer

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Answer is 1715

Step-by-step explanation:

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7 0
3 years ago
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In ΔАВС, m∠ACB = 90°, <br> CD<br> ⊥ <br> AB<br> m∠ACD = 30°, and AC = 6 cm. Find BD
myrzilka [38]
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3 years ago
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Solve for x<br> x + y = 1<br> x + 7y = -4<br> 2x - 6y = 4<br> 5x + 15y = -10<br> 2x + 6y = 10
Arada [10]
X + y = 1
add - y both sides
x + y +  - y = 1 +  - y
x =  - y + 1
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Graph: y =  - x + 1


x + 7y =  - 4
add - 7 both sides
x + 7y +   - 7y = - 4 +  -7y
x =  - 7y  - 4
Answer: x = - 7y   - 4
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2x  - 6y = 4
add 6y to both sides
2x  - 6y + 6y = 4 + 6y
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add - 15 to both sides
5x + 15y +   - 15y = - 10 +  - 15y
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divide both sides by 5
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add - 6y to both sides
2x + 6y +  - 6y = 10 +  - 6y
2x =  - 6y + 10
divide both sides by 2
2x/2 = - 6y + 10/2
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Answer: x =  -3y + 5
Graph: y =  - 0.333333x  +  1.666667





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Answer:

Step-by-step explanation:

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