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Goshia [24]
3 years ago
10

Which of the following is a correct interpretation of the expression -4 - (-7)?

Mathematics
2 answers:
Zielflug [23.3K]3 years ago
5 0

Answer:

D

Step-by-step explanation:

So we have the expression:

-4-(-7)

First, simplify. Two negatives make a positive. Therefore, the -(-7) turns into +7:

-4-(-7)\\=-4+7

When adding on the number line, we move to the right.

Therefore, the correct interpretation is the value 7 digits to the <em>right</em> of -4.

D is the correct answer.

Oliga [24]3 years ago
5 0

Answer:

D.  the number that is 7 to the right of -4 on the number line

Step-by-step explanation:

interpret -4 - (-7)

=  -4 +7

therefore

the number that is 7 to the right of -4 on the number line

so its D.

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3 years ago
A piece of wire measuring 20 feet is attached to a telephone pole as a guy wire. The distance along the ground from the bottom o
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Answer: Height at which the wire is attached to the pole is 12 feet.

Explanation:

Since we have given that

Length of the wire = 20 feet

Let the height at which wire is attached to the pole be h

and distance along the ground from the bottom of the pole to the end of the wire be x+4

Now, it forms  a right angle triangle so, we can apply "Pythagorus theorem".

H^2=B^2+P^2\\\\20^2=x^2+(x+4)^2\\\\400=x^2+x^2+8x+16\\\\400=2x^2+8x+16\\\\400=2(x^2+4x+8)\\\\200=x^2+4x+8\\\\x^2+4x-192=0\\\\x^2+16x-12x-192=0\\\\x(x+16)-12(x+16)=0\\\\(x+16)(x-12)=0\\\\x=-16\ and\ 12

But height cant be negative so, height will be 12 feet.

Hence, height at which the wire is attached to the pole is 12 feet.


8 0
3 years ago
The diagram shows two congruent regular polygons joined together.
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Write the equation of the line that’s tangent to the given function at x=1 f(x)= two x to the third power minus four x
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f(x)=2x^3-4x

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3 years ago
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Answer:

1. Two point perspective view

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Step-by-step explanation:

6 0
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