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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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Rick bought some tetra fish and goldfish for his fish tank. He bought twice as many goldfish as he did tetras. Each goldfish cos
kolezko [41]

The system of equations that can be used to determine the number of tetra fish and goldfish purchased is:
x = 2 y. 2 x + 1.5 y = 20

<h3>What are the system of equations ?</h3>

In order to determine the required values, two linear equations would be formed from the question. The two equations would exhibit the relationship between the two types of fishes:

The first equation would show the ratio between the two types of fishes bought: 2y = x

Th second equation would show the total cost of the two type of fish:1.5y + 2x = 20

To learn more about simultaneous equations, please check: brainly.com/question/16763389

#SPJ1

6 0
2 years ago
Read 2 more answers
Because of the commutative property of multiplication, it is true that
rewona [7]

Answer:

It is Commutative

Step-by-step explanation:

An operation ∆ is said to be Commutative if a∆b=b∆a ∀ a,b ∈ ℝ.

Given the operation ∆ defined by:

a∆b=a X b

a=\frac{3}{4}, b=4

a∆b=\frac{3}{4}X4

=\frac{3X4}{4}=3

Similarly, for the right hand side.

(\frac{4}{3})^{-1}=\frac{3}{4}

Therefore:

b∆a=4X \frac{3}{4}

=\frac{4X3}{4}=3

These are the two ways of solving this problem and we have in fact shown that the operation is commutative as:

a∆b=b∆a=3

3 0
3 years ago
Write an equation for the translation of x^2 + y^2 = 49 by 7 units right and 4 units up
Tatiana [17]

Answer:

(x - 7)² + (y - 4)² = 49

Step-by-step explanation:

Given

Equation: x² + y² = 49

Required:

New Equation when translated 7 units right and 4 units up

Taking it one step at a time.

When the equation is translated 7 units right, this implies a negative unit along the x axis.

The equation becomes

(x - 7)² + y² = 49

When the equation is translated 4 units up, this implies a negative unit along the y axis.

(x - 7)² + (y - 4)² = 49

The expression can be further simplified but it's best left in the form of

(x - 7)² + (y - 4)² = 49

8 0
2 years ago
PLEASE HELP!!! OFFERING 50 POINTS!!!!
Otrada [13]

Answer:

slope-intercept form y= -2/3 x + 490 slope is -2/3 y intercept is (0.490)

Step-by-step explanation:

2x+3y= 1470

3y= 1470-2x

y= 1470/3- 2/3 x

y= -2/3 x+ 490

slope is -2/3 and y intercept is 490 when x =0

the graph represent the amount of sandwiches that Sal's shop sold, where x is the number of sandwiches and y is the number of wraps sold. so that x won't exceed 735 sandwiches : 0≤x≤735 and  0≤ y≤490.

<u>total profit is 1593.</u>

2x+3y= 1593

y= -2/3 x + 531

similar : the two functions have the same slope -2/3

difference: 0≤ y≤531

                   0≤x≤796.5

the two line are parallel

7 0
3 years ago
3x-6y= -12
inn [45]
There is no solution to this system of equations because they both have the same slope.

If two lines have the same slope, but are not identically the same line, then they will never intersect. There is no pair (x, y) that could satisfy both equations, because there is no point (x, y) that is simultaneously on both lines. Therefore, these equations are said to be inconsistent, and there is no solution.
5 0
2 years ago
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