Answer:
The short answer is there isn’t.
Start by writing each of these as an expression:
x * y = 60
x + y = 7
Next, solve each for the same variable; in this case, y:
(x * y) / x = 60 / x
.: y = 60 / x
(x + y) - x = 7 - x
.: y = 7 - x
Next, replace y of the second expression to the first
y = 60 / x & y = 7 - x
.: 7 - x = 60 / x
Now, solve for x:
(7 - x) * x = (60 / x) * x
.: x * 7 - x^2 = 60
This is quadratic, so write it in the form of ax2 + bx + x = 0
(-1)x^2 + (7)x + (-60) = 0
.: a = -1, b = 7, c = -60
Finally solve for b:
x = (-b +- sqrt(b^2 - 4*a*c)) / 2a
.: x = (-7 +- sqrt(7^2 - 4*-1*-60)) / (2 * -1)
.: x = (-7 +- sqrt(49 - 240)) / -2
.: x = (-7 +- sqrt(-191)) / -2
The square root of a negative value is imaginary and thus there’s no real answer to this problem.
Take 124,000 books and multiply it by the percentage of children fiction which is 23%
124,000 x 0.23 = 28,520 children fiction books
Answer:
B. 6x^2 + 15x + 9
Step-by-step explanation:
You will have to take the 1st term in the 1st parentheses. Multiply it with the other 2 terms in the 2nd parentheses. Do the same thing with the 2nd tems in 1st parentheses.
2x*3x + 2x*3 + 3*3x + 3*3
6x^2 + 6x +9x +9
Now add like terms and simplify
<u>6x^2+15x+9</u>
There's your answer. :)
