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3 years ago

Which double facts help you solve 6+5=11

Mathematics

1 answer:

Likurg_2 [28]3 years ago

6 0

9+2 = 11 8+3 = 11are you going to do is just add in that's all it does

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Please only do 2 through 6

finlep [7]

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3 0

2 years ago

A 45 foot ladders leaning up against a building. The base of the latter is 20 feet away from the building. What is the angle of

Tatiana [17]

Answer:

The angle of elevation to the top of the building is 63.61 degrees

Step-by-step explanation:

Here, we want to calculate angle of elevation to the top of the building.

For this, we need a triangle

Please check for this in the attachment.

From the diagram, we are to calculate the angle theta.

To do this, we use trigonometric identities.

Looking at what we have, we have the hypotenuse and the adjacent.

So the trigonometric identity to use is the cosine

Mathematically Cosine theta = adjacent/hypotenuse

Thus, Cos theta = 20/45

Cos theta = 0.444444444444444

Theta = Arc cos(0.444444444444444)

Theta = 63.61 degrees

8 0

3 years ago

Brian needs to find the value of a number, a, so that when (x^2+3x) is added to the binomial (3x^2+ax), the sum simplifies to 4x

Julli [10]

Answer:

a = 9

Step-by-step explanation:

First we need to add (x^2+3x) to (3x^2+ax),

(x^2+3x)+(3x^2+ax)

Expand

= x^2+3x+3x^2+ax

Collect the like terms

= x^2+3x^2+3x+ax

= 4x^2 + 3x + ax

= 4x^2+(3+a)x

Equate the solution to 4x^2+12x

4x^2+(3+a)x = 4x^2+12x

Comparing the like terms on both sides

(3+a)x =12x

3 + a = 12

a = 12 - 3

a = 9

Hence the value of a is 9

6 0

2 years ago

What transformation was made for this triangle?

Musya8 [376]

Answer:

Dilation

Step-by-step explanation:

Dilation is when a shape is made bigger but the form of the shape does not change. So its enlarged.

7 0

3 years ago

PLEASE SOVEL THIS I WILL GIVE OUT 20 POINT

Anettt [7]

9514 1404 393

Answer:

21.25 seconds

Step-by-step explanation:

In miles per second, the speed of the jet is ...

(720 mi/h)/(3600 s/h) = 1/5 mi/s

The speed of the sound is the same:

(1 mi)/(5 s) = 1/5 mi/s

Then the rate of closure between the airplane and the sound is ...

(1/5 mi/s) +(1/5 mi/s) = 2/5 mi/s

To find the time required to close a gap of 8 1/2 miles, we can use the relation ...

time = distance/speed

time = (8.5 mi)/(0.4 mi/s) = 21.25 s

The pilot will hear the thunder 21.25 seconds after the flash.

5 0

3 years ago