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3 years ago

X+4y=30 system by substitution X-2y=0

Mathematics

1 answer:

Dmitry [639]3 years ago

3 0

Answer:

x=10, y=5

Step-by-step explanation:

For substitution, you always want to get the variable alone. The second equation (x-2y=0) will be easier to substitute into the first equation.

x-2y=0

x=2y

You can substitute 2y as x on the first equation (x+4y=30).

2y+4y=30

6y=30

y=5

Plug y=5 into any equation.

x+4(5)=30

x+20=30

x=10

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The watermelon that weighed 12 pounds cost $5.76 what was the cost per ounce of the watermelon? A. $0.48 B. $0.36 C. $0.03 D.

Leto [7]

Answer:

the answer is A. 0.48 $

Step-by-step explanation:

the price of ounce of the watermelon is :

$\frac{5.76}{12} = 0.48 \:$

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3 years ago

Y=<br> Pls help solve for

miss Akunina [59]

Answer:

$y=39\degree$

Step-by-step explanation:

The given triangle is a right angle triangle .

The known sides of the triangle that is opposite to angle y is 8 units while the side adjacent is 10 units.

The value of y can be calculated using the tangent ratio.

$\tan(y)=\frac{8}{10}$

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$y=38.66$

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3 years ago

5 + 17х + 9 = 2х 21x 14

babunello [35]

Answer:

simplify x=0 is the correct answer

3 0

3 years ago

...........................

cupoosta [38]

Answer:

3/5 or 0.6

Step-by-step explanation:

Here, given the value of tan theta , we want to find the value of sine theta

Mathematically;

tan theta = 0pposite/adjacent

Sine theta = opposite/hypotenuse

Firstly we need the length of the hypotenuse

This can be obtained using the Pythagoras’ theorem which states that the square of the hypotenuse equals sum of the squares of the two other sides.

Let’s call the hypotenuse h

h^2 = 3^2 + 4^2

h^2 = 9 + 16

h^2 = 25

h = √(25)

h = 5

Now from the tan theta, we know that the opposite is 3

Thus, the value of the sine theta = 3/5 or simply 0.6

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3 years ago

viktelen [127]

Answer:

what is this.

Please write in a proper way.

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3 years ago