Answer:
x = 5, y = -2
Step-by-step explanation:
2x + 5y = 0 --- Equation 1
Equation 1×3: <u>6x</u> + 15y = 0 --- Equation 2
3x - 4y = 23 --- Equation 3
Equation 3×2: <u>6x</u> - 8y = 46 --- Equation 3
<em>We will be eliminating 6x from Equation 2. </em>
Equation 3-2: 6x - 8y - 6x - 15y = 46-0
-23y = 46
y = 46 ÷ -23
<u>y = -2 </u>
Substitute y = -2 into Equation 1:
2x + 5y = 0
2x + 5(-2) = 0
2x + (-10) = 0
2x - 10 = 0
2x = 10
x = 10 ÷ 2
<u>x = 5 </u>
Check the attachment or picture for the completed worksheet.
I don't know if you know something called PEMDAS
Parentheses
Exponent
Multiply
Divide
Add
Subtract
So you would do the -2(-7) first giving you 14
So now we have -62/12 +14
now you would do -62/12 giving you -5.16666667
and now the equation is -5.16666667 + 14 = 8.83333333
I know for a fact, being in Calculus Honors, that what I did to simplify is correct. Using the Order of Operations, or PEMDAS (Commonly remebered as "Please Excuse My Dear Aunt Sally<span>". It stands for "Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction".) to simplify this answer is necessary.
If your teacher wrote this problem please inform him or her of Order of Operations before your classmates use it even though its wrong.</span>
Answer:
7 weeks
Step-by-step explanation:
49 divided by 7 is 7
