3 years ago

Please helppp its too hard!!!

1 answer:

4 0

21) 2x+16=2*23+16=46+16=62
3x-7=3*23-7=69-7=62,
so we can see that 2x+16=3x-7, that means that lines are parallel , because the corresponding angles are equal.

problem with triangle
130+a=180, a=50,

50+8x+2x=180
50+10x=180
10x=130
x=13

8x+b=180
b=180-8x=180-8*13=76

2x+c=180
c=180-2x
c=180-2*13= 154

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What are the exact solutions of x^2 = 5x + 2?

aleksandrvk [35]

Move everybody to one side
minus 5x+2 both sides
x^2-5x-2=0
use quadratic formula where
if you have
ax^2+bx+c=0
x= $\frac{-b+/- \sqrt{b^{2}-4ac} }{2a}$

1x^2-5x-2=0
a=1
b=-5
c=-2

x= $\frac{-(-5)+/- \sqrt{(-5)^{2}-4(1)(-2)} }{2(1)}$
x= $\frac{5+/- \sqrt{25+8} }{2}$
x= $\frac{5+/- \sqrt{33} }{2}$

aprox
x=5.372281323 or -0.3722813233

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3 years ago

I think the answer is C is this correct? And if not can I get some help?

blsea [12.9K]

Answer:

yes it is c you are correct

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3 years ago

X2 – 3x + 10<br><br> What is the answer to this?

Tpy6a [65]

Answer:

-1x+10