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ikadub [295]
3 years ago
10

A ladder is leaning against a tall wall with the foot of the ladder placed at 7 feet from the base of the wall and the angle of

elevation is 73' 30' 40"
Mathematics
1 answer:
djverab [1.8K]3 years ago
7 0

Complete question is;

A 21 ft ladder is leaning against a tall wall with the foot of the ladder placed at 7 feet from the base of the wall and the angle of elevation is?

Answer:

θ = 70.5°

Step-by-step explanation:

The angle of elevation simply means the angle that the ladder makes with the ground. Let's call this angle θ.

I've attached a diagram showing the triangle made by this ladder and the wall.

From the attached diagram, we can see the triangle formed by the ladder and the wall.

We can find the angle of elevation θ from trigonometric ratios.

Thus;

7/21 = cos θ

cos θ = 0.3333

θ = cos^(-1) 0.3333

θ = 70.5°

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1920.2923 in expanded form and in words
STALIN [3.7K]

Answer:

1,000  

+ 900  

+ 20  

+ 0  

+   0.2

+   0.09

+   0.002

+   0.0003

Step-by-step explanation:

one thousand nine hundred twenty and two thousand nine hundred twenty-three ten-thousandths

3 0
3 years ago
Which properties are present in a table that represents an exponential function in the form y-b* when b > 1?
erastovalidia [21]

Answer:

<u>Properties that are present are </u>

Property I

Property IV

Step-by-step explanation:

The function given is  y=b^x  where b > 1

Let's take a function, for example,  y=2^x

Let's check the conditions:

I. As the x-values increase, the y-values increase.

Let's put some values:

y = 2 ^ 1

y = 2

and

y = 2 ^ 2

y = 4

So this is TRUE.

II. The point (1,0) exists in the table.

Let's put 1 into x and see if it gives us 0

y = 2 ^ 1

y = 2

So this is FALSE.

III. As the x-value increase, the y-value decrease.

We have already seen that as x increase, y also increase in part I.

So this is FALSE.

IV. as the x value decrease the y values decrease approaching a singular value.

THe exponential function of this form NEVER goes to 0 and is NEVER negative. So as x decreases, y also decrease and approached a value (that is 0) but never becomes 0.

This is TRUE.

Option I and Option IV are true.

3 0
3 years ago
Read 2 more answers
Factorise 2x^2 - 9x -5
Nostrana [21]

Answer:

(x-5)(2x+1)

Step-by-step explanation:

Its called google XD

5 0
3 years ago
Lily owed Megan $129.42. So far, she has paid Megan $32.56.
anzhelika [568]

Answer:

She still owes her $96.86

Step-by-step explanation:

Subtract 32.56 from 129.42

7 0
3 years ago
I justify whether the expression -4x-8 is equivalent to -2(x+1)-2(x+3) by letting x=3 in both expressions. What is the value of
zubka84 [21]
Substituting x = 3 into the first expression:

-4(3) - 8 = -12 - 8 = -20

Substituting x = 3 into the second expression:

-2(3 + 1) - 2(3 + 3) = -2(4) - 2(6) = -8 - 12 = -20
7 0
3 years ago
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