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Alex Ar [27]
3 years ago
11

Please help no one is answering and I cannot figure this out I just wasted 10 points on some moron who didn't even explain

Mathematics
2 answers:
sergey [27]3 years ago
4 0

Answer:

d) x+y = 38

please give me brainliest :)

Otrada [13]3 years ago
4 0
I think the answer is A
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Suppose for some value of x the solution to the equation 2.5(y−x)=0 is y = 6. What must be true about x?
Varvara68 [4.7K]

Step-by-step explanation:

In this case, you input the value of y (y = 6) into the equation ( 2.5(y-x)= 0)

2.5(6-x) = 0

Open the bracket,

(2.5×6)-2.5x= 0

Collect like terms.

2.5x= 2.5×6

Divide both sides by the coefficient of x (2.5)

x = 6

So,

x= 6 is true.

.

Substituting 6 for x in the equation,

2.5(6-6)= 0

2.5•0 = 0

0= 0

Which is also true.

7 0
2 years ago
What is the radius of a circle whose equation is x2 + y2 + 8x – 6y + 21 = 0?
s344n2d4d5 [400]

Answer:

2 units

Step-by-step explanation:

The given equation of the circle is:

x^{2} + y^{2}+8x-6y+21=0

The general equation of the circle is:

x^{2} + y^{2}+2gx+2fy+c=0

Comparing the given equation with the general equation we can say:

g = 4

f = -3

c = 21

The formula for radius of the circle is:

radius=\sqrt{g^{2} +f^{2} -c }

Using these values of the given circle, we get:

radius=\sqrt{(4)^{2}+(-3)^{2}-21}\\\\radius=\sqrt{4}\\\\radius=2

Therefore, the length of radius of the given circle is 2.

3 0
3 years ago
Of the 50 plays attributed to a​ playwright, 11 are​ comedies, 19 are​ tragedies, and 20 are histories. If one play is selected
Cerrena [4.2K]
The answer is 3/5, or 60%

11 (comedies) + 19 (tragedies) = 30
30/50 = 3/5, or 60%
3 0
3 years ago
Streak
Monica [59]

Answer: Not 100% sure but this is what I think.

-4/5

Step-by-step explanation:

(5, -1) (15, −9)

1Y - 2Y / 1X - 2X = SLOPE

-1 + 9 / 5 - 15 = 8/-10 = -8/10 = -4/5

7 0
2 years ago
Select the correct answer choice below: *<br> Captionless Image
sleet_krkn [62]

Answer:

theres nothing there

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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