4 years ago

4x -9y= -42 x+5y=4 Solve by elimination

Mathematics

2 answers:

solniwko [45]4 years ago

6 0

This is what I got as the answer

9966 [12]4 years ago

5 0

Answer:

x = -6 and y = 2

Step-by-step explanation:

4x-9y = -42

x+5y = 4

4x-9y = -42

4x + 20y = 16

Take them away from each other.

-29y = -58

Find what one y is by dividing.

-58 / -29 = 2

y = 2

Substitute back into original.

x + 10(5*y) = 4

Take 10 away to find x.

x = -6

Check if answer is correct.

4x - 9y = -42

-24 - 18 = -42

Final Answer: x = -6 and y = 2

You might be interested in

A ball is thrown from an initial height of

guajiro [1.7K]

IF your equation is this: h(t)= -16t^2 + 27t + 7, then you set it equal to 17 and solve for t. What this does is tells you the times (t) when the ball is exactly 17 feet off the ground. Because this is a parabola, the ball will go up past the 17 foot mark, then pass it again on the way back down. This happens at .55 seconds (going up), and 1.13 seconds (coming down).

8 0

3 years ago

Suppose you are making yourself a sandwich. how many different sandwiches can you make if you have 4 choices in bread, 2 choices

sesenic [268]

You would have 40 Choices

8 0

3 years ago

What is the slope of the line that contains the points (4, 2) and (6, -2)?

Lera25 [3.4K]

Answer:

m = -2

Step-by-step explanation: