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DedPeter [7]
3 years ago
11

Someone please help me I’m not good in math

Mathematics
1 answer:
Artist 52 [7]3 years ago
7 0
The missing factor is (a -1) I believe. If you foil (5a + 9)(a - 1) you would get 5a^2 + 4a - 9.
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If a is a real number, which property is shown by a = a?
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"Reflexive Property" is the property shown as a = a

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Help me plz
irakobra [83]

Answer:

I could do 1 and 3

1) 2x-3y=-2 ....1

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2x+y=14......2

=-4y=-16

y=4

<u>Substitute</u><u> </u><u>(</u><u>y</u><u>=</u><u>4</u><u>)</u><u> </u><u>into</u><u> </u><u>equation</u><u> </u><u>1</u>

2x-3 (4)=-2

2x-12=-2

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-3x+5y=4......2

=8x=16

x=2

<u>S</u><u>ubstitute</u><u> </u><u>(</u><u>x</u><u>=</u><u>2</u><u>)</u><u> </u><u>into</u><u> </u><u>equation</u><u> </u><u>1</u>

<u>5</u><u> </u><u>(</u><u>2</u><u>)</u><u>+</u><u>5y</u><u>=</u><u>20</u>

<u>10</u><u>+</u><u>5y</u><u>=</u><u>20</u>

<u>5y</u><u>=</u><u>20-10</u>

<u>5y</u><u>=</u><u>10</u>

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5 0
3 years ago
Read 2 more answers
I need the answers and the work please for those two questions
Gnesinka [82]

16) It would be: 6+5+3+2 - 1+3+6+4 = 16 - 14 = 2 in.

17) -8/2 + -6/1 + -9/3+ -6/2 = -4-6-3-3 = -16

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.o7 should be it hope I helped
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Solve for d: 6d2 + 5d = 1.
HACTEHA [7]
D = 1/6 or d = -1. i hope this helps
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