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2 years ago

Find perimeter and area

Mathematics

1 answer:

makkiz [27]2 years ago

3 0

Answer:which one

Step-by-step explanation: which one 50

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Solve 2cos x+2cos 2x=0 on the interval [0,2pi)

rjkz [21]

$2cosx+2cos2x=0 \\ -2sin^2x+2cos^2x+2cosx=0 \\ -2(1-cos^2x)+2cos^2x+2cosx=0 \\ -2+2cos^2x+2cos^2x+2cosx=0 \\ 4cos^2x+2cosx-2=0 \\ t=cos x \\ 4t^2+2t-2=0 \\ \Delta=4+32=36 \\ t_1= \frac{-2-6}{8}=-1 \\ t_2= \frac{-2+6}{8}= \frac{1}{2} \\ cos x=-1 \lor cos x= \frac{1}{2} \\ x=-\pi \lor x= \frac{5\pi}{3}$

6 0

2 years ago

Read 2 more answers

I'm so confused can someone help me

jenyasd209 [6]

3/2(x - 10 ) = 1/2 x + 5
expand by using distributive property
3/2 x - 15 = 1/2 x + 5
subtract (1/2 x ) on both sides
x - 15 = 5
add 15 on both sides
x = 20

answer
C. x = 20

7 0

3 years ago

Read 2 more answers

In the table below, match the number that corresponds to each point on the number line shown.

Gwar [14]

Answer:

a -1.7 b.-1.2 c.-0.5 d.0.6 e.1.1

Step-by-step explanation:

3 0

2 years ago

Suppose the diameter of a circle is \color{green}{6}6start color green, 6, end color green units. What is its circumference?

inessss [21]

Answer:

C = 6pi units

C is approximately 18.84 units

Step-by-step explanation:

The circumference of a circle is given by

C = pi *d

The diameter is 6 units

C = 6*pi units

If we approximate pi by 3.14

C = 6*3.14

C = 18.84 units

3 0

3 years ago

Question 11 (1 point)

AleksAgata [21]

Answer:

no clue bud

Step-by-step explanation:

6 0

3 years ago