I assume you are asking to solve:
-2x^2 + 3x - 9 = 0
So first, this equation does not have real roots.
It only has 2 complex roots.
The roots are:
3/4 * (1-i√7) and 3/4 * (1+i√7)
Answer: 165 miles
Step-by-step explanation:
-->As his average speed is 55miles per hour means he covered 55 miles in one hour.
-->Therefore, in 3 hours the distance covered by him would be= 55 × 3= 165 miles
Answer:
The expression 5(4x - 7) + 3(3x + 3) can be simplified to 29x - 26
Step-by-step explanation:
The first step in solving this is to apply coefficients to the contents of the brackets:
5(4x - 7) + 3(3x + 3)
= 5 × 4x - 5 × 7 + 3 × 3x + 3 × 3
= 20x - 35 + 9x + 9
Now you can group like terms:
20x - 35 + 9x + 9
= 20x + 9x - 35 + 9
= (20 + 9)x - 26
= 29x - 26
And that is the final answer.
Step-by-step explanation:
f(x)=5x-3
g(x)=5x-4
f(g(x))
f(5x-4)=5(5x-4)-3
25x-20-3
=25x-23
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