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gulaghasi [49]
3 years ago
12

Solve: (-2)(-1)-3) =

Mathematics
1 answer:
Anettt [7]3 years ago
6 0

Answer:

-6

Step-by-step explanation:

its -6 because you do -2 times -1 and dats 2 and then 2 timesb-3 and thats -6

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An aeroplane at an altitude of 200m observes the angle of depression of opposite points on the two banks of a river to be 45 and
blagie [28]

Answer:

  84.5 m

Step-by-step explanation:

It is often helpful to draw a diagram for word problems involving geometric relationships. One for this problem is shown below.

The mnemonic SOH CAH TOA reminds you of the relationship between sides of a right triangle:

  Tan = Opposite/Adjacent

Here we're given angles of depression measured from the horizontal (as shown in the diagram), but it is more convenient to use angles measured from the vertical. In particular, ∠BAO is the complement of 60°, and its tangent is the ratio OB/OA:

  tan(30°) = OB/OA

  OB = (200 m)·tan(30°) ≈ 115.47 m . . . . . . multiply by OA, use OA=200 m

Likewise, we have ...

  OC = (200 m)·tan(45°) = 200 m

Then the width of the river is the difference between these values:

  BC = OC -OB = 200 m - 115.47 m = 84.53 m

4 0
3 years ago
I don’t understand this at all
Lesechka [4]

Step-by-step explanation:

I dont either tbh

6 0
3 years ago
Peter has 6 sweaters, 4 pairs of jeans, and 3 pairs of shoes. how many different outfits can peter make using one sweater, one p
sdas [7]
The answer is 72 because 6x4x3=72
5 0
2 years ago
Diego scored 9 points less than Andre in the basketball game.
grin007 [14]

Answer:

14

Step-by-step explanation:

Diego scored 5 points (half of Noah's 10)

which is 9 less than 14!

5 0
2 years ago
Subtract 14 from<br> the product of 3<br> and n
Lina20 [59]

Answer:

14-3n

Step-by-step explanation:

5 0
2 years ago
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