2 years ago

0.489 in two other from

Mathematics

1 answer:

liberstina [14]2 years ago

5 0

One form is 489/1000

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Andrew asked every tenth person at the mall how old they are. What type of sample did he form?

NARA [144]

Answer:

it is a convenience sample

Step-by-step explanation:

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2 years ago

Solve 2csc^2x-2cscx-1=0 <br> for 0° ≤ x ≤ 360°

umka21 [38]

Answer:

Step-by-step explanation:

2 csc²x-2 csc x-1=0

$\frac{2}{sin^2x} -\frac{2}{sin x} -1=0\\multiply~by~sin^2x\\2-2sin~x-sin^2x=0\\sin^2x+2sinx-2=0\\sin ~x=\frac{-2 \pm\sqrt{2^2-4*1*(-2)} }{2*1} \\=\frac{-2 \pm\sqrt{4+8} }{2} \\=\frac{-2 \pm\sqrt{4*3} }{2} \\=\frac{-2 \pm2\sqrt{3} }{2} \\=-1\pm\sqrt{3} \\|sin~x| \le ~1\\so~sin~x=-1+\sqrt{3} \\sin~x=\sqrt{3} -1\\x=sin^{-1}(\sqrt{3} -1) \approx 47.06^\circ,180-47.06\\or~x=47.06^\circ,132.94^\circ$

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2 years ago

Work it out plzsssss help me

lakkis [162]

1. alternate interior angles
2. angle 1 ≈ angle 2
So,
2x+5=x+59
-x. -x
x+5=59
-5 -5
x=54!!

3. Plug in the value of x into the expression for angle 2
54+59=113
Angle 2=113°

5 0

2 years ago

What is the value of y in the sequence below? 2, y, 18, -54, 162 ,...

mixer [17]

Answer:

Explanation:

mutiply by 3 first

2*3= 6

6*3= 18

to get to -54 , mutiply by -3 with 18

-3*18= -54

-54*-3= -162