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nikitadnepr [17]
2 years ago
7

Which of the following will result in a negative number?

Mathematics
2 answers:
AlladinOne [14]2 years ago
6 0

Answer:

D

Step-by-step explanation:

reminder on addition / subtraction

+ (- ) = - or - ( + ) = -

- ( - ) = +

(+) + ( +) = +

A

7 + (- 5) = 7 - 5 = 2 ← not negative

B

1 + (- 1) = 1 - 1 = 0 ← not negative

C

- 3 + 4 = 1 ← not negative

D

(- 3) + 2 = - 1 ← negative

Roman55 [17]2 years ago
3 0
The correct answer is: D. (-3) + 2 = -1

The other ones result in a positive sum:

A: 7 + (-5) = 2
B: 1 + (-1) = 0
C: (-3) + 4 = 1
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A student solved the following problem and made an error: Triangles ABC and DEF. Angles A and F are congruent and measure 135 de
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We have that
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using a graph tool
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Line 1<span> Segment AC equals 2. Segment FE equals 2. Segment AC is congruent to segment FE 
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Segment FE equals 2-----> is correct
Segment AC is congruent to segment FE------> is correct

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<span>Line 3 Length of segment AB. A (0, 2) B (2, 4) d equals square root of quantity x sub 2 minus x sub 1 squared plus quantity y sub 2 minus y sub 1 squared, d equals square root of quantity 0 minus 2 all squared plus quantity 2 minus 4 all squared, d equals square root of negative 2 squared plus negative 2 squared, d equals square root of 4 plus 4, d equals square root of 8 segment AB = 2.83
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<span>Line 4 Length of segment DE. D (2, 0) E (4, 4) d equals square root of quantity x sub 2 minus x sub 1 squared plus quantity y sub 2 minus y sub squared, d equals square root of quantity 2 minus 4 all squared plus quantity 0 minus 4 all squared, d equals square root of negative 2 squared plus negative 4 squared, d equals square root of 4 plus 16, then d equals square root of 20 segment DE = 4.47
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find the distance DE
d=√[(4-0)²+(4-2)²]--------> d=√[16+4]-----> d=√20-----> d=4.47
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so
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<span>Line 5 segment AB is congruent with segment DE
AB is not congruent with DE
so
Line 5 is not correct

therefore

the answer is
</span><span>the student make the first mistake in line 5</span><span>

</span>

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