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BabaBlast [244]
3 years ago
7

What’s x ? And what’s y ?

Mathematics
1 answer:
astraxan [27]3 years ago
6 0

Step-by-step explanation:

Given

x = 2y

And

-4x + 11y = 15

- 4 * 2y + 11y = 15

-8y + 11y = 15

3y = 15

Therefore y = 5

Now putting y = 5

x = 2* 5

= 10

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4) The area of a piece of pie in the shape of a sector is 7.1 in. The angle of the sector is 40°. Find the diameter of
elixir [45]

Answer:

Step-by-step explanation:

Area of sector = angle/360 * pi * r^2

7.1 = 40/360 * 22/7 * r^2

7.1 = 1/9 * 22/7 * r^2

63.9 = 22r^2/7

r^2 = (7 * 63.9)/22

r^2 = 20.331818181818

r = square root of 20.331818181818

r = 4.51

d = r * 2 = 4.51 * 2 = 9.02

4 0
4 years ago
(x+1)(5x-2) multiplying binomial
Serjik [45]

Answer:

5x^23x-1

Step-by-step explanation:

you use the distributive property to multiply these together


so its x times 5x plus x times -2 plus 1 times 5x plus 1 times -2

5 0
4 years ago
Give an example from your classroom of three collinear points
vagabundo [1.1K]
Chess board? , the board if there is like a line with points that has points on the same line. 
4 0
3 years ago
Which ordered pair would form a proportional retationship with the points in the graph?
shtirl [24]

Answer:

(9, 6)

Step-by-step explanation:

the given points are

(3, 2)

(6, 4)

so, can you see, how the sequence continues ?

I see immediately that for every 3 additional units of x we add 2 units of y.

so, yes, the next point in the sequence is

(6 + 3, 4 + 2) = (9, 6).

so, this point (or ordered pair) follows the same ratio or proportional relationship between x and y as the points already in the graph.

in other words, they are on the same line following the same slope ("y coordinate change / x coordinate change" when going from one point on the line to another).

7 0
2 years ago
Determine whether the graphs of y=1/2x-8 and y=-2x-6 are parallel, perpendicular, coincident, or none of these.
katovenus [111]

Answer:

They are parallels

Step-by-step explanation:

3 0
3 years ago
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