235 + 0.05(235) = 235 + 11.75 = 246.75 <== total cost (with the 5% tax being 11.75)
Answer:
B) y=2.75x
Step-by-step explanation:
2.75 is the amount the DVDs cost and x is the number of DVDs Fran buys. So it'll cost her 2.75 for every DVD she buys
Answer:
Solution is not correct.
Step-by-step explanation:
Given question is incomplete; Here is the complete question.
Is the solution shown in the attachment correct ?
9x + 2 = 8x² + 6x
We have to solve this equation with the help of quadratic formula,
-8x² + 9x + 2 = 6x
-8x² + 9x - 6x + 2 = 0
-8x² + 3x + 2 = 0
Quadratic formula of a standard quadratic equation (ax² + bx + c = 0) is,
x = ![\frac{-b\pm\sqrt{b^{2}-4ac}}{2a}](https://tex.z-dn.net/?f=%5Cfrac%7B-b%5Cpm%5Csqrt%7Bb%5E%7B2%7D-4ac%7D%7D%7B2a%7D)
By comparing our equation with the standard quadratic equation,
a = -8
b = 3
c = 2
By substituting the values of a, b and c in the quadratic formula,
x = ![\frac{-3\pm\sqrt{(3)^{2}-4(-8)(2)}}{2(-8)}](https://tex.z-dn.net/?f=%5Cfrac%7B-3%5Cpm%5Csqrt%7B%283%29%5E%7B2%7D-4%28-8%29%282%29%7D%7D%7B2%28-8%29%7D)
x = ![\frac{-3\pm\sqrt{9+64} }{-16}](https://tex.z-dn.net/?f=%5Cfrac%7B-3%5Cpm%5Csqrt%7B9%2B64%7D%20%7D%7B-16%7D)
x = ![\frac{9\pm\sqrt{73}}{16}](https://tex.z-dn.net/?f=%5Cfrac%7B9%5Cpm%5Csqrt%7B73%7D%7D%7B16%7D)
Therefore, the given solution is not correct.
You take how many shirts she sold and then multiply it by the cost of one shirt.
Therefore, you do 39 shirts * $16.50, which is equal to $643.50 in revenue :)
Answer:
x = 1
General Formulas and Concepts:
<u>Pre-Algebra</u>
Step-by-step explanation:
<u>Step 1: Translate</u>
"Five" = 5
"times" is multiplication
"difference" is subtraction
"twice" means 2 times something
"a number" = <em>x</em>
"is" means equal
"-10" = -10
<u>Step 2: Set up equation</u>
5(2x - 4) = -10
<u>Step 3: Solve for </u><em><u>x</u></em>
- Distribute 5: 10x - 20 = -10
- Isolate <em>x </em>term: 10x = 10
- Isolate <em>x</em>: x = 1