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Neporo4naja [7]
3 years ago
6

The sum of the numbers j,k, and m is 115. The ratio of j to k is 2:7 and the ratio of k to m is 14:5. What is the value of k?

Mathematics
2 answers:
I am Lyosha [343]3 years ago
8 0

Answer:

I know how to help you.

Step-by-step explanation:

There is a web site called Khan Academy and it can help you understand how to solve it and it is completely free and you can use it as much as you want. There are videos that explain it to you and problems like help with practice I 100% reccomend it!

JulijaS [17]3 years ago
7 0

Answer:

f. 70

Step-by-step explanation:

I did this question in another brainly problem, but ok. So first k has to be able to divide by 14 and 7. Divided all the answers by 7 first. Then 14. Only 70 is able to divide by 7 and 14. Lastly check to see if it works. 2:7 = 20=70. 14:5 = 70:25. 20+70+25=115.

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5 divided by 60<br> 5/60 ??
mr Goodwill [35]

Answer:

1/12 or 0.08333333333

Step-by-step explanation:

5/60 can be factored  to 1/12 because the two numbers are each divisible by 5.

6 0
3 years ago
Read 2 more answers
The coordinates of the point that is a reflection of Y(-4, -2) across the x-axis are ( , ). The coordinates of the point that is
AURORKA [14]

Answer:

Reflection across the x-axis: (-4,2)

Reflection across the y-axis: (4,-2)

Step-by-step explanation:

Going based off of what I see, a reflection across the x axis changes "y" & the same rule applies to the y axis.

It should be an L shape.

7 0
3 years ago
45 45 90<br> This question is using the 45 45 90 rule can someone help
AleksAgata [21]

Answer:

x= 4.24

y= 4.24

Step-by-step explanation:

1) I began by analyzing the given number, which in this case is the hypotenuse. I know the hypotenuse is equal to x√2.

2) I divided 6 by √2, which gave me 4.24.

5 0
3 years ago
Use Euler's method with step size 0.2 to estimate y(1), where y(x) is the solution of the initial-value problem y' = x2y − 1 2 y
oksano4ka [1.4K]

Answer: -1.0018*10^42

Step-by-step explanation:

The Euler Method in numerical analysis is used to approximate the solution to an initial value problem using the tangent line to the solution curve through the (x0,y0) to obtain such approximations.

The euler method equation is:

Yn+1 = Yn + h*f(Xn,Yn)

Where n = number of steps, h = Xn+1 - Xn, f(Xn,Yn) is the slope of the curve at (Xn,Yn).

Variables given in the equation

Y(X=0) = 9,

X0 = 0.

h = step = 0.2

f(X,Y) = X^2*Y - 12*Y^2

B

For the first step, n = 0 in the euler equation. Therefore we have:

Y1 = Y0 + h*f(X0,Y0)

Substituting the Y0 = 9 and X0 = 0 into the function f(X,Y) = X^2*Y - 12*Y^2 = 0^2*9 - 12*9^2 = -972.

Therefore Y1 = 9 + 0.2*(-972) = -185.4.

For n = 1

Repeating the same step with X1 = X0 + h = 0 + 0.2 = 0.2,

Y1 = -185.4,

h = 0.2.

Substitute the variables into the equation Y2 = Y1 + h*f(X1,Y1) and f(X1,Y1) = X1^2*Y1 - 12*Y1^2

Y2 = -82682.4672.

Continue the iterations following the steps above till the result is reached.

The summary of the iteration.

When n = 0, X = 0, Y = -185.4

When n = 1 , X = 0.2, Y = -82682.4672

When n = 2 , X = 0.4, Y = -1.6407*10^10

When n = 3, X = 0.6, Y = -6.4609*10^20

When n = 4, X = 0.8, Y = -1.0018*10^42

4 0
3 years ago
Answer I need help this question because I don’t know what it is and I need help
Lesechka [4]

Answer:

17

Step-by-step explanation:

QS and RS equal the same

5x - 8 = 3x + 2

-3x  +8    -3x +8

2x = 10

x = 5 you would then plug x into QS

5(5) - 8

25 - 8

17

5 0
3 years ago
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