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andrezito [222]
3 years ago
9

Is a horizontal line a function? Like y=7.

Mathematics
1 answer:
Sonja [21]3 years ago
3 0

let's recall the vertical line test, <u>for a function, if we run a vertical line anywhere it, it'll touch it only once</u>.  is that true for a horizontal line? yeap.

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The circumference of a circle is 5.7mm what is the area of the circle to 1 d.p.
balu736 [363]
So the area of a circle is pi x the radius squared.
To find the radius we need to half the diameter so 2.85mm
Next we need to square this so 2.85 x 2.85 = 8.1225mm
The area = pi x 8.1225
= 25.51758633mmsquared
= 25.5 mmsquared
7 0
3 years ago
The height of a triangular window is 3 feet less than its base. The area the window is 20 ft.? find the dimensions of the window
Ivenika [448]

Let us assume base of the window = b feet.

Height is 3 feet less than base, that is = (b-3).

Given area of the triangle = 20 feet square.

We know formula for area of a triangle:

Area = \frac{1}{2} × Base × Height

Plugging values in formula, we get

20 = \frac{1}{2} b \times (b-3)

\mathrm{Multiply\:both\:sides\:by\:}2

40=b\left(b-3\right)

40=b^2-3b

b^2-3b-40=0

Factoring quadratic, we get

\left(b+5\right)\left(b-8\right)=0

b+5=0

b=-5

b-8=0

b=8.

For base we can take only positive value.

<h3>Therefore, base of the triangle = 8 feet and height = 8 -3 = 5 feet.</h3>
6 0
3 years ago
Simplify the expression (x^5)^1/9.
galina1969 [7]

Answer:

x^{\frac{5}{9}}

Step-by-step explanation:

4 0
4 years ago
What is the measure of angle L?<br><br> Round only your final answer to the nearest hundredth.
Whitepunk [10]

Answer:

1.27 radians

Step-by-step explanation:

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Which expression represents that x was doubled and then decreased by 25% ?
VladimirAG [237]

Answer:

x1.5

Step-by-step explanation:

say x is 1 then is we multiply by 2 we get 2 and if we decrease 2 by 25% we get 1.5 and that number works for any number instead of multiplying by 2 and decreaseing by 25% as they reveal the same number.

6 0
3 years ago
Read 2 more answers
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