Ask question

Ask question

All categories

2 years ago

10

If two equations are 3x + 2y = 14; 5x + 3y = 12, then the value of 5x – y is

1 answer:

musickatia [10]2 years ago

6 0

Answer:

-124

Step-by-step explanation:

3x + 2y = 14 (×3) → 9x + 6y = 42

- → x = -18

5x + 3y = 12 (×2) → 10x + 6y = 24

3(-18) + 2y = 14

-54 + 2y = 14 → 2y = 14 + 54 = 68 → y = 68/2 = 34

5x - y = 5(-18) - 34 = -90 - 34 = -124

You might be interested in

A company makes an ice-cream treat in the shape of a hemisphere on top of a cone, as shown below.

lesya [120]

Answer:

56/3 pi cm^3

Step-by-step explanation:

1/2 volume of sphere = 1/2 4/3 pi r^3

volume of cone 1/3 pi r^2 h

r =2 h = 10

result : 56/3 pi cm^3

6 0

1 year ago

Anni [7]

Answer:

62%

Step-by-step explanation:

$\frac{1240}{2000} \times 100 = 64\%$

7 0

2 years ago

What is the answer? -4 + x = -26

algol13

Answer:

x = -30

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

Divide £208 in the ratio 3:1<br><br> How do I do this??

inysia [295]

Answer:

s = r1 s = 3.1 s = 3.1

or

v =a/s

v = 208/3.1

v = 67.0968

Step-by-step explanation:

3 0

2 years ago

Allison bought three pounds of strawberries for $19.20. What is the price, in dollars per ounce of strawberries?

aleksandr82 [10.1K]

Answer:

40 cents per ounce

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers