Evaluate the expression when c=4 and d=40 d-5c

Mathematics

1 answer:

Illusion [34]3 years ago

3 0

Answer:

Step-by-step explanation:

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Find the area of the sector (shaded part). Round to the nearest hundredth! <br><br> No links!!

igor_vitrenko [27]

Answer:

~183.78

Step-by-step explanation:

A = pi 9² ≈254.47

260/360=13/18

254.47/18×13≈183.78

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3 years ago

Solve the equation x^2-4x+85=0

lara [203]

Can't factor
use quadratic
for
ax^2+bx+c=0
x= $\frac{-b+/- \sqrt{b^2-4ac} }{2a}$

given
1x^2-4x+85=0
a=1
b=-4
c=85

x= $\frac{-(-4)+/- \sqrt{(-4)^2-4(1)(85)} }{2(1)}$
x= $\frac{4+/- \sqrt{16-340} }{2}$
x= $\frac{4+/- \sqrt{-324} }{2}$
x= $\frac{4+/- (\sqrt{-1})(\sqrt{324}) }{2}$
remember that √-1=i
x= $\frac{4+/- i(\sqrt{324}) }{2}$
x= $\frac{4+/- i(18) }{2}$
x=2+/-9i

x=2+9i or x=2-9i

3 0

3 years ago

Find the Value of x from the following :

Sonja [21]

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