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3 years ago

-4x + 11y = 15 x=2y Solve for y and x

Mathematics

1 answer:

Stolb23 [73]3 years ago

8 0

Answer:

to find Y

-4x + 11y = 15

x - 2y = 0

equal= -3x + 9y= 15

since x=2y

-3(2y) + 9y = 15

-6y + 9y =15

3y = 15

y = 15/ 3

y = 5

to find x

using x=2y

since

y=5

,therefore

x= 2(5)

x= 10

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3 years ago

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My name is Ann [436]

Answer:

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3 years ago

In a right triangle where one of the angles measure 30° what is the ratio of the length of the side opposite the 30°angle to the

kifflom [539]

Answer:

The ratio of the length of the side opposite the 30°angle to the length of the side opposite the 90°angle is 1:2.

Step-by-step explanation:

Consider ABC, With 90° angle at B and 30° angle at C.

To find: AB:AC=?

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AB = perpendicular of the right angled triangle

AC = Hypotenuse of the triangle

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$\frac{1}{2}=\frac{AB}{AC}$

The ratio of the sides ,AB:AC = 1:2.

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VladimirAG [237]

Answer:

Infinite

Step-by-step explanation:

3(4x + 1) - 2

= 12x + 3 - 2 (Multiply the sum in the bracket by 3)

= 12x + 1 (Simplify)

This means that:

12x + 1 = 3(4x + 1) - 2

is the same as

12x + 1 = 12x + 1

Hence, anything that is used to substitute x is correct.

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3 years ago