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Pani-rosa [81]
2 years ago
13

Select two values of x that are roots of this equation (picture included) x^2+2x-5=0

Mathematics
2 answers:
jenyasd209 [6]2 years ago
8 0

Answer:

B and D

Step-by-step explanation:

i took this test

WINSTONCH [101]2 years ago
7 0

Step-by-step explanation:

A and C are correct options

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For a parallelogram with a long side that is 4 times the length of its short side find the area if the height from the long side
Zielflug [23.3K]

9514 1404 393

Answer:

  c.  1150 square units

Step-by-step explanation:

The sum of the two side lengths is half the perimeter, so is 125/2 = 62.5 units. The long side is 4/5 of that, so is 50 units.

The area is the product of the long side and the height to the long side:

  A = bh

  A = (50 units)(23 units) = 1150 units²

__

<em>Additional comment</em>

This geometry is impossible, because the height from the long side cannot be more than the length of the short side. Here, the short side is 12.5 units, so it is not possible for the height to be 23 units.

If the height is measured from the short side, then the area is 287.5 square units.

5 0
3 years ago
How much carbon dioxide will you prevent from entering the atmosphere in one year, if you replace a 100-watt light bulb with a C
Afina-wow [57]

Answer:

280000lb

Step-by-step explanation:

In this question, we shall be calculating the amount of carbon iv oxide prevented from entering the atmosphere.

Generally we know that 1kwh produces 1.37 lbs of Carbon iv oxide in the atmosphere

Now, using a 100 watt light bulb daily for 8 hours, for a year, the amount of Carbon iv oxide produced will be;

100 * 1.37 * 8 * 365 = 40040 lb

Using a 30 watt CFL for 8hrs/ day for a year, we have;

30 * 1.37 * 8 * 365 = 120012 lb

Now calculating the amount of CO2 prevented, we have 40040 - 120012 = 280028 lb = 280000 after rounding up

3 0
3 years ago
I will give you a little brainliest
aalyn [17]

Answer:

C

Step-by-step explanation:

C

6 0
2 years ago
Read 2 more answers
3) Jackson ate a chocolate bar in 2 1/2 minutes. How much of the bar did he eat
nignag [31]

Answer:

0.4 of the chocolate bar.

Step-by-step explanation:

3 0
2 years ago
Simplify each expression <br> 4+8(-2n+3)
artcher [175]

Answer:

  28 -16n

Step-by-step explanation:

Use the distributive property, then collect terms.

  4 +8(-2n +3)

  = 4 +8(-2n) +8(3)

  = 4 -16n +24

  = 28 -16n

_____

This could also be written

  -16n +28

but then the leading sign would be negative. Sometimes leading minus signs get lost, so I prefer the first term to be positive.

3 0
3 years ago
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