15 pointss! please help asap i need to turn the assignment in

Mathematics

1 answer:

valentinak56 [21]3 years ago

3 0

Answer:

I think it goes like this:

4x+5x=180

9x=180

x=180:9

x=20

Step-by-step explanation:

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The supplementary angle of 100.6° is

Nuetrik [128]

It would be an obtuse angle

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3 years ago

Complete the equation of variation where y varies inversely as x and y = 80 when x = 0.7.

andre [41]

Y varies inversely with x
means that y=k/x
with x=0.7 and y=80
we have 80=k/0.7
k=0.7x80=56
so the equation is
y=56/x

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3 years ago

Read 2 more answers

How do you this question? Please explain.

Nuetrik [128]

Answer:

Step-by-step explanation:

Recognize that all the triangles are right triangles, so are similar to each other. In these similar triangles, the ratio of the short side to the long side is the same for all.

... CB/CA = CT/CB

... CB² = CA·CT = 10·6 = 60 . . . . . . . . . . multiply by CA·CB; substitute values

... CB = √60 = 2√15 . . . . . . . take the square root; simplify

_____

<em>Comment on this solution</em>

The altitude to the hypotenuse of a right triangle (CB in this case) divides the hypotenuse into lengths such that the altitude is their geometric mean. That is ...

... CB = √(AC·CT) . . . . as above

This is true for any right triangle — another fact of geometry to put in your list of geometry facts.

3 0

3 years ago

Calculate the gradient of the line using rise/run method.

Lapatulllka [165]

Given:

The graph of line.

To find:

The gradient of the line using rise/run method.

Solution:

We know that the gradient of a line is also known as slope.

$Slope=\dfrac{Rise}{Run}$

Consider the two intercepts, then rise is distance between origin and y-intercept and run is the distance between origin and the x-intercept. But rise must be negative because the value of y decreased from 3 to 0.

$Rise=-3$