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dolphi86 [110]
3 years ago
6

Solving systems of equations using substitution y = 5x + 17. y= -2x -4

Mathematics
1 answer:
oksian1 [2.3K]3 years ago
6 0

Answer:

(-3,2)

Step-by-step explanation:

Eliminate the equal sides of each equation and combine

5x + 17 = -2x - 4

Solve

x = -3

Evaluate  y  when  x  =  − 3 .

y = 2

(-3,2)

<em>hope this helps :)</em>

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5/y + 7/x =24<br> 12/y + 2/x =24 ,find the ratio of x to y.
rosijanka [135]

Answer:

Step-by-step explanation:

5/y + 7/x =24.........(1)

12/y + 2/x =24........(2)

Let 1/y = a and 1/x = b

5a + 7b = 24 ...........(3)

12a + 2b = 24...........(4)

Multiply (3) by 2 and (4) by 7

10a + 14b = 48..........(5)

84a + 14b = 168.........(6)

Substracting (5) from (6)

84a - 10a = 168 - 48

74a = 120

a = 120/74

a = 60/37

Putting a = 60/37 in (3)

5a + 7b = 24

5(60/37) + 7b = 24

300/37 + 7b = 24

Multiply each term 37

300 + 259b = 888

259b = 888 - 300

259b = 588

b = 588/259

And a = 1/y

60/37 = 1/y

Cross multiply

60y = 37

y = 37/60

Also

b = 1/x

588/259 = 1/x

Cross multiply

588x = 259

x = 259/588

7 0
3 years ago
The total cost, c, of belonging to two different gyms for m months is shown on the graph. The lines intersect at the point (4,25
lys-0071 [83]

Answer: at 4 months the cost for each gym is $250

Step-by-step explanation:

5 0
3 years ago
!!!BRAINY AND 10 PTS!!!
Dovator [93]

Answer:

its the 2nd on on the top row

Step-by-step explanation:

5 0
3 years ago
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The length is not provided and need to find the shaded area
earnstyle [38]

Answer:

The Area of Shaded region is 98 square inch

Step-by-step explanation:

In this given figure

length = 8 in = 3 + x

breadth = 4 + y

In a Rectangle

a shape with four straight sides and four angles of 90 degrees (right angles). Two of the sides are longer than the other two

Now, let the smaller side be x and bigger side be y

Here, we get the equation

x + 3 = 8

x + 3 - 3 = 8 - 3

x = 5

Here, we get the value of x is 5

Now, By Pythagoras Theorem

x² + y² = 13²

(5)² + y² = 169 (x = 5)

25 + y² = 169

y² + 25 - 25 = 169 - 25

y² = 144

√y² = √144

y = 12

So, breadth = 4 + 12 = 16 inch

Now, For the area of rectangle

A = l × b

A = 8 × 16 in

A = 128 square inch

In a given triangle,

b = y = 12 in

h = x = 5 in

Now, For the area of Triangle

<em>A = ½ × b × </em><em>h</em>

A = ½ × 12 × 5 in

A = 6 × 5 in

A = 30 Square inch

So, For the shaded area,

= Area of Rectangle - Area of triangle

= 128 - 30

= 98 square inch

Thus, The Area of Shaded region is 98 square inch

<u>-</u><u>TheUnknownScientist</u>

3 0
3 years ago
7|n| = 56<br>anyone know how to do dis?!?!​
diamong [38]

Answer:

{-8, 8}

Step-by-step explanation:

Simplify   7· |n| = 56 by dividing both sides by 7:  

|n| = 8

Because this is an absolute value equation, there are two separate solutions.  One is n = +8 and the other is n = -8.

5 0
3 years ago
Read 2 more answers
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