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aleksklad [387]
2 years ago
13

Factor completely 2. 4x² – 9 [2 pts]

Mathematics
1 answer:
Nat2105 [25]2 years ago
8 0

Answer:

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

Step-by-step explanation:

Both 4 and 9 have square roots and the problem is a difference of two squares. So if factored, one parenthesis will have a - and the other will have a +.

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What is 1 over 2 multiplied by 1 over 5?
Irina18 [472]

Answer:

i think its 1/10 or 1 over 10

Step-by-step explanation:

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3 years ago
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In order to safely land, the angle that a plane approaches the runway should be no more than 15°. A plane is approaching Ottawa
belka [17]

9514 1404 393

Answer:

  9.5°, yes

Step-by-step explanation:

The relevant trig relation is ...

  Tan = Opposite/Adjacent

The distance opposite the angle of elevation is the plane's height, 500 m. The distance adjacent to the angle of elevation is the horizontal distance to the plane, 3 km = 3000 m. Then the angle is found from ...

  tan(α) = 500/3000 = 1/6

  α = arctan(1/6) ≈ 9.46°

The plane is approaching at an angle of 9.46°. It is safe to land, since that angle is less than 15°.

_____

<em>Additional comment</em>

The usual descent angle for most commercial air traffic is 3°. Some airport geography demands it be different (steeper). A higher descent angle can put undue stress on the landing gear.

5 0
3 years ago
Step 1 choices:
Julli [10]
You have to translate the triangle over to where point B is lined up with point B in the second triangle. Then you can reflect over the y-axis.
So...your answer should be...
Step 1:A.
Step 2:C.
6 0
3 years ago
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(10x-11) + (3x-2) + (3x+1) = 180
Sauron [17]

Answer:

right across my mom is the best I can get in a lot and I don't think so

Step-by-step explanation:

carbon fiber and fiber is not a problem in the morning and it doesn't work for me because I am sorry to get the best results in the process but it will get worse when I have a good idea to make a difference and 87inches will be there for me and I have no problems in my body step and the symptoms of my illness will have 7 or so severe symptoms that may 6PM up with my symptoms of depression and anxiety and depression in my heart as a child in a very much and very much

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2 years ago
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Pls write the steps u did​
frez [133]

When two parallel lines are intersected by a transversal, the same-side exterior angles are supplementary. That means that their sum is 180.

Using that logic, if the two roads were parallel, then the sum of their same-side exterior angles will add up to 180. Yet their same-side exterior angles add up to 170 (130 + 40 = 170), hence they can't be parallel.

See the drawing attached below.

Using supplmenatry angles (two angles whose sum of measures add up to 180 or a straight line), we can say that:

m<DIE + m<HID = 18

40 + m<HID = 180

m<HID = 140

Similarly:

m<BHC + m<CHI = 180

130 + m<CHI = 180

m<CHI = 50

Using verticle angles therome, (when two lines intersect, the angles opposite to eachother are congruent, or have the same measure), we can say that:

m<DIE = m<GIH = 40

m<GIE = m<HID = 140

m<CHI = m<AHB = 50

m<BHC = m<AHI = 130

5 0
2 years ago
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