1). Since you have -2y and 4y, elimination is easy to do for solving for x..
Keep the first equation and multiply the second equation by 2. Then add.
5x - 2y = -1
8x + 4y = 56
10x - 4y = -2
8x + 4y = 56
-----------------
18x = 54
x = 3
Now we can use substitution to solve for y.
Substitute 3 for x in the first original equation and solve for y.
5x - 2y = -1
5(3) - 2y = -1
15 - 2y = -1
-2y = -16
y = 8
(3, 8)
2.)
3x - y = =16
-4x - y = 21
Multiply both sides of the first equation by -1 to change all signs. Then when you add the equations, you eliminate y and solve for x.
-3x + y = 16
-4x - y = 21
-----------------
-7x = 37
x = -37/7
Now multiply the first original equation by 4 and the second original by 3 to eliminate x and solve for y.
12x - 4y = -64
-12x - 3y = 63
---------------------
-7y = -1
y = 1/7
Solution: (-37/7, 1/7)
There are a total of 4 quarters and 16 nickels.
Answer:
Option C. continuous except x = 5 and x = 9.
Step-by-step explanation:
The given function is 
Now we have to check the continuity of the given function
We know if the denominator of a function which is in the form of a fraction is 0 then the given function is not continuous.
If we put x - 5 = 0
x = 5
and x - 9 = 0
x = 9
These are the two values of x for which the function is not defined.
Therefore option C. function is continuous except x = 5 and x = 9
is the correct answer.
Answer:
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Answer:
<h2>2 pizzas </h2>
Step-by-step explanation:
