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igor_vitrenko [27]
3 years ago
13

Solve this system by ELIMINATION!9x-12y=15 -4x+4y=0​

Mathematics
1 answer:
Andreas93 [3]3 years ago
5 0

Answer:

x = -5

y = -5

Step-by-step explanation:

here's the solution :-

multiply equation (2) with 3

we get,

=》9x - 12y = 15

=》-12x + 12 y = 0

by adding the equations, :-

=》9x - 12y - 12 x + 12y = 15 + 0

=》-3x = 15

=》x = 15 ÷ -3

=》x = -5

putting the value of x as -5 in equation (2)

=》-4x + 4y = 0

=》( -4 × -5 ) + 4y = 0

=》20 + 4y = 0

=》4y = - 20

=》 y = -20 ÷ 4

=》y = -5

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A ________ is the complete collection of all measurements or data collected, whereas, a ________ is a subcollection of members s
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A population is the complete collection of all measurements or data collected, whereas, a sample is a subcollection of members selected from the complete collection

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3 years ago
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Evaluate the expression. 5^2−4⋅6+11 Enter your answer in the box.
mart [117]

Explanation:

This question's it's about the order of operations. P-parenthesis, E-exponents, M-multiply, D-divide, A-add, and S-subtract. It can also go left to right.

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6 0
3 years ago
Ft
Fofino [41]

Answer:

. We assume, that the number 260 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 260 is 100%, so we can write it down as 260=100%.

4. We know, that x is 6.75% of the output value, so we can write it down as x=6.75%.

5. Now we have two simple equations:

1) 260=100%

2) x=6.75%

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

260/x=100%/6.75%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 6.75% of 260

260/x=100/6.75

(260/x)*x=(100/6.75)*x       - we multiply both sides of the equation by x

260=14.814814814815*x       - we divide both sides of the equation by (14.814814814815) to get x

260/14.814814814815=x

17.55=x

x=17.55

now we have:

6.75% of 260=17.55

Step-by-step explanation:

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3 years ago
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Answer: I think the answer is 16384!

Step-by-step explanation:

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2 years ago
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