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svp [43]
3 years ago
12

Which of the following expressions is equal to -3x^2-12??!!! please help him

Mathematics
1 answer:
Andreyy893 years ago
3 0

Answer:

-3 ( x+2i) (x-2i)

Step-by-step explanation:

-3x^2-12

Factor out a -3

-3(x^2 +4)

Rewrite

-3 ( x^2 - -4)

-3 ( x^2 - (-2i)^2)  This is the difference of squares ( a^2 -b^2 ) = (a-b)(a+b)

-3 ( x- -2i) (x+2i)

-3( x+2i) (x-2i)

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5. On a college campus, the library is 80 yards due east of the dormitory and the recreation center is due north of the
Luda [366]

The length of the new sidewalk between the Dormitory to the recreation center is 143 yards

We need to understand the concept of Bearing and Distance in order to be able to determine how long is the new sidewalk.

<h3>What are Bearing and Distance?</h3>

The Bearing of an angle measures the movement of an angle in a clockwise direction starting from the North Pole. However, the distance shows how the length of the sides of the angle can also be measured.

From the diagram attached below:

  • The adjacent of the sidewalk way = 80 yards.
  • The hypotenuse shows the new sidewalk way  = x( unknown)
  • The angle θ = 56°

Using the relation from trigonometry:

\mathbf{Cos \ \theta = \dfrac{adjacent}{hypotenuse}}

\mathbf{Cos \ 56 = \dfrac{80 \ yards }{x}}

\mathbf{x= \dfrac{80 \ yards }{Cos \ 56 }}

\mathbf{x= 143.06 \ yards}

x ≅ 143 yards

Learn more about Bearing and distance here:

brainly.com/question/17007896

5 0
2 years ago
Please be kind and help me with​ this question!<br> WARNING: only if your good at math thank you #3
Alexxx [7]

First of all, look at the figure, The ABC orientation is changed from clockwise to counterclockwise, so an odd number of reflections are involved.

Second, look at the answer choices. Right away, you notice that the last choice (E) involves two reflections. That cannot be the transformation you see. Since that is what the question is asking for, the appropriate choice for the transformation NOT done is ...

... E. reflection across the x-axis followed by a reflection across the y-axis

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I have to admit, I went through each of the choices to see if it would work to produce the image you see. All choices except E will do that. All that work turned out to be unnecessary.

6 0
3 years ago
NO LINKS!!! Please help with this match part 3​
Damm [24]

Answer:

  • 114°
  • 126°

Step-by-step explanation:

Since the figures are similar, the corresponding angles are congruent.

Corresponding angles are the angles with vertices with same order number in the name of the figures.

Angles V and E are corresponding as both are the second vertex:

  • m∠V = m∠E = 114°

Same for angles W and F (third vertex)

  • m∠W = m∠F = 126°
3 0
2 years ago
Read 2 more answers
Overnight the temperature went from 39*F to -5*F. What is the difference in temperature?
AlekseyPX
Answer: The difference in temperature is -44 degrees.

Explanation: Since the new temperature is a negative number and the old was positive, you add them together. However instead of (-5) +39 (which the answer would be 35), you would write 5 +39 because -5 is 5 spaces away from 0. You can also check by using the equation 39 -44. You would get the answer -5, proving that the answer is indeed -44 degrees.
6 0
3 years ago
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Andy, Fergus, Evelyn, and Margaret are collecting cans for recycling. Before lunch they have collected a total of 173 cans. At t
Salsk061 [2.6K]

Answer:

n would be the number of cans Andy, Fergus, and Evelyn collected

Step-by-step explanation:

because if they only give Margaret's number then you wouldn't know the number of everyone else.

4 0
3 years ago
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