Answer:
68
Step-by-step explanation:
You first multiply $61 by .20(decimal form of 20%) and get $12.2
Since this is 20% off(that means it's less than the original price) so subtract 12.2 from $61=48.8
then add the tax so 48.8 by .05 =2.44
so 48.8+2.44
the final price is $51.24
Answer: x=12
Step-by-step explanation:
If (x^2 -10) is one of the factors, that can be further factored into:
(x - sqrt(10) ) * (x+sqrt(10)) =0
making 2 of the 4 solutions equal:
3.1623 and -3.1623
I then used an algebraic long division calculator
http://calculus-calculator.com/longdivision/
to calculate:
<span>x^4 + 5x^3 ‒ x^2 ‒ 50x ‒ 90 divided by x^2 -10 which equals
</span>x^2 + 5x + 9
Using the quadratic formula, the roots of that equation are:
x = -5 + sqrt (-11) / 2
and
x = -5 - sqrt (-11) / 2
Both of those roots are not real.
I tried using online graphing calculators for x^4+5x^3-x^2-50x-90=0 but none worked.
2. For this equation,
<span>3x^2 ‒ 8x + k = 0
I used my OWN quadratic formula calculator
http://www.1728.org/quadratc.htm
and found that real roots no longer exist after "k" is greater than 5.3
</span>
Y=4(x-3)+8
Mark brainliest please
Hope this helps
