I think what you meant to type is "markup". If the markup is 6.5%, we need to increase the cost by that amount. To find 6.5% of a number we convert it to a decimal, .065, and we add 1.00, to get 1.065. The 1, when multiplied, gives us the original amount, and the .065 gives us the additional amount. We multiply that by 784.5. 784.5 x 1.065 = 835.49. The other way to do it is to just multiply by 0.065, and you get 784.5 x 0.065 = 50.99, then add it to the original amount, 784.5 + 50.99 = 835.49.
Answer:
Step-by-step explanation:
1) If you really meant X^2+12=40, then this simplifies to x^2 = 28, and therefore x = ±√28, or x = ±2√7.
2) If you meant X^2+12x=40:
a) Take half of the coefficient of x: that would be (1/2)(12), or 6.
b) Square this result, obtaining: 6² = 36
c) Add this 36 to x^2 + 12x + 40, and then subtract it: We get:
x² + 12x + 36 - 36 = 40, or x² + 12x + 36 = 76
We have to add 36, as indicated above, to "complete the square."
Answer:
x>−3 or x<−7
Step-by-step explanation:
