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sdas [7]
3 years ago
12

Use mental math to find the difference. 1254 - 320

Mathematics
2 answers:
Arturiano [62]3 years ago
7 0
The correct answer is 934
jekas [21]3 years ago
4 0
The answer to this is 934.
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Smallest to largest 0.8 30% 3/5
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Rewrite the equation by completing the square.<br> x^2−2x−35=0
mafiozo [28]

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-5, and 7

Step-by-step explanation:

see the steps below:)

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3 years ago
What is the correct power to change 760,000 into scientific notation? 760,000 = 7.6 X________​
mixer [17]

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7 0
3 years ago
PLEASE HELP GIVING MANY POINTS!
NeTakaya

Answer:

  69.01 m

Step-by-step explanation:

The mnemonic SOH CAH TOA reminds you ...

  Tan = Opposite/Adjacent

The tangent function is useful for problems like this. Let the height of the spire be represented by h. The distance (d) across the plaza from the first surveyor satisfies the relation ...

  tan(50°) = (h -1.65)/d

Rearranging to solve for d, we have ...

  d = (h -1.65)/tan(50°)

The distance across the plaza from the second surveyor satisfies the relation ...

  tan(30°) = (101.65 -h)/d

Rearranging this, we have ...

  d = (101.65 -h)/tan(30°)

Equating these expressions for d, we can solve for h.

  (h -1.65)/tan(50°) = (101.65 -h)/tan(30°)

  h(1/tan(50°) +1/tan(30°)) = 101.65/tan(30°) +1.65/tan(50°)

We can divide by the coefficient of h and simplify to get ...

  h = (101.65·tan(50°) +1.65·tan(30°))/(tan(30°) +tan(50°))

  h ≈ 69.0148 ≈ 69.01 . . . . meters

The tip of the spire is 69.01 m above the plaza.

3 0
3 years ago
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