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BARSIC [14]
3 years ago
6

15. Solve: 21-3y=36-6y A) 19 B) 5 C) -5/3 D) -19

Mathematics
2 answers:
juin [17]3 years ago
6 0
<span>21-3y=36-6y        +3y
21 = 36 - 3y          -36
-36+21 = -3y
- 15 = - 3y              ÷ -3
5 = y

Choice: B


</span>
pav-90 [236]3 years ago
6 0
21 - 3y = 36 - 6y

We're essentially just trying to get both of the "y's" with one another on the same side.

So, we must add 6y to both sides.

21 -3y + 6y = 36

Now, we must subtract 21 from both sides.

-3y + 6y = 36 - 21

Simplify.

3y = 15

Divide both sides by 3.

y = 15/3

y = 5

So, B) 5 is correct

~Hope I helped!~
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25.7 is what percent of 141? Show wrk
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Divide 25.7 by 141.

\dfrac{25.7}{141} \approx 0.1822

Now, multiply that with 100 percent to get the percentage.

0.1822 \times 100 \%=18.22 \%

18.22% is your answer! If the question wants you to round it to the nearest percent, the answer will be 18%.
6 0
4 years ago
Find the side of an equilateral triangle if its area is 25√3 cm2
Sever21 [200]

Answer:

10

Step-by-step explanation:

area=√3/4×a^2

100√3 = √3×a^2

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3 years ago
What is the volume of the container?
dangina [55]

Answer:

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7 0
3 years ago
Which equation represents a circle centered at (3,5) and passing though the point (-2,9)
Maru [420]

The equation represents a circle centered at (3,5) and passing through the point (-2,9) will be,\rm x^2+y^2 -6x-10y-7=0

What exactly is a circle?

It is a point locus drawn equidistant from the center. The radius of the circle is the distance from the center to the circumference.

Given data;

The Centre of the circle is,(h,k)=(3,5)

The circle traverses (-2,9). Consequently, the radius of the circle r is equal to the separation between (3, 4) and (-2,1).

So radius;

r = \sqrt{{{(x_2-x_1)^2 + (y_2-y_1)^2}}

r = \sqrt{{(9-5)^2+(3+2)^2 }

r=\sqrt {41} \\\\ r =6.1 \ units

Now equation of the circle with center (h,k) and radius r is

\rm (x-h)^2 + (y-k)^2 = r^2\\\\ (x-3)^2 + (y-5)^2 = (\sqrt{41})^2\\\\ x^2 - 6x + 9 + y^2 - 10y + 25 = 41

x^2+y^2 -6x-10y-7=0

Hence equation represents a circle that will be,x^2+y^2 -6x-10y-7=0

To learn more about the circle, refer to the link: brainly.com/question/11833983.

#SPJ1

7 0
2 years ago
15/10 as a mixed number
makvit [3.9K]
15/10 as a mixed number is 1 5/10 or 1 1/2
6 0
3 years ago
Read 2 more answers
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