we know that
in expanded form is equal to
therefore
<u>the answer is</u>
3 apples cost $1.26. How much do 10 apples cost?
1 answer:
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Answer:
x = 17 $20 bills
y = 30 $5 bills
General Formulas and Concepts:
- Order of Operations: BPEMDAS
- Multivariable Systems
Step-by-step explanation:
<u>Step 1: Define variables</u>
x = # of $20 bills
y = # of $5 bills
<u>Step 2: Set up systems of equations</u>
<u /><u />
<u />
<u>Step 3: Solve for </u><em><u>x</u></em>
- Rewrite:
- Substitute:
- Distribute 5:
- Combine like terms:
- Subtract 235 on both sides:
- Divide both sides by 15:
By solving for <em>x</em>, we now know that we have 17 $20 bills.
<u>Step 4: Solve for </u><em><u>y</u></em>
- Define: x + y = 47
- Substitute: 17 + y = 47
- Subtract 17 on both sides: y = 30
Now we know that we have 30 $5 bills.
answer: y = 3/2x - 2
how i got the answer:
<em>slope intercept form: y = mx + b (slope = m , y-intercept = b)</em>
<em>with this form, any value for y or x should work and have one true solution.</em>
so, let's start by finding the y intercept, or what y is when x = o. in this case, it looks like it's -2, so we can add that to the equation.
y = mx - 2
to find the slope, let's plug a y and x value in the graph into the equation to isolate m and get our slope.
let's use the point (2,1)
1 = (2)m - 2
1+2 = 2m -2+2
3 = 2m
3/2 = 2m/2
= m
the slope is 3/2. lets add that to the rest of our equation:
y = 3/2x - 2
now that we have the slope value, our equation is complete!
there you go! hope this helps, and have a great day!