Answer:
7.5
Step-by-step explanation:
3/8 = x/20
3(20) = 8x
8x = 60
x = 60/8
x = 7.5
We are asked in this problem to find the real root of the polynomial f(x) = x3 + 0.5x2 + 4.5. in this case, to find the root of the equation, we equate the equation to zero.
<span>f(x) = x³ + 0.5x² + 4.5 = 0
2x3 + x^2 + 9 = 0
</span><span>x1=−1.83557
</span>x2=0.66779+1.41619∗i
x3=0.66779−1.41619∗i
answer is -1.84
Multiply 0.75 by 100
75 %
3 reds in the 10 remaining cards
so that is 30% are red