Answer:
23
Step-by-step explanation:
2x+14+x+7=90, 3x+21=90,3x=90-21. 3x=69, x=23
Answer:
$126
Step-by-step explanation:
Well first you would have to see how much the total sale of 700 chocolate bars is,
700*1.20=$840
Next you need to multiply the 15% thats going to club shirts,
$840*0.15=126
So your answer is $126
Answer:
x = -2
Step-by-step explanation:
The equation of a parabola that opens up and has the following x intercepts (-3,0) and (4,0) is ![y=x^{2}-x-12](https://tex.z-dn.net/?f=y%3Dx%5E%7B2%7D-x-12)
<h3><u>Solution:</u></h3>
We have to find the equation of a parabola that opens up and has the following x intercepts (-3, 0) and (4, 0)
x-intercepts of the parabola are (−3, 0) and (4, 0)
So, we can form an equation:
Also x = 4
x – 4 = 0
x – 4 = 0 is another factor of quadratic equation.
The quadratic function is:
![\begin{array}{l}{y=(x+3)(x-4)} \\\\ {y=x^{2}-4 x+3 x-12} \\\\ {y=x^{2}-x-12}\end{array}](https://tex.z-dn.net/?f=%5Cbegin%7Barray%7D%7Bl%7D%7By%3D%28x%2B3%29%28x-4%29%7D%20%5C%5C%5C%5C%20%7By%3Dx%5E%7B2%7D-4%20x%2B3%20x-12%7D%20%5C%5C%5C%5C%20%7By%3Dx%5E%7B2%7D-x-12%7D%5Cend%7Barray%7D)
Hence, the equation of the parabola is ![y=x^{2}-x-12](https://tex.z-dn.net/?f=y%3Dx%5E%7B2%7D-x-12)