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pshichka [43]
3 years ago
15

What is/are the exact solutions for the equation 2cos^2x+3cosx+1=0 on the intercal (0,2pi)

Mathematics
1 answer:
Dafna1 [17]3 years ago
5 0

Answer:

x = \frac{2\pi }{3}  and \frac{4\pi }{3}

Step-by-step explanation:

I graphed the equation below.

If these answers are correct, please make me Brainliest!

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Points and will give brainlist
Nitella [24]

Answer:

The Answer is C

Step-by-step explanation:

hope this helps

8 0
2 years ago
Read 2 more answers
What is the volume of 1.5 Tonne of sand of density 2600 kg/m3?  <br>​
Mrac [35]

Answer: 0.58 m^3

Step-by-step explanation:

V= 2600 / 1500

= 0.58 m^3

5 0
3 years ago
I WILL MARK AS BRAINLIEST!!!!
guapka [62]

Answer:

1. 795, 23

2. 50, she will finish her candy on November 21 so she won't be able to share with her cousins

3. $276, 71 cars

Step-by-step explanation:

1. your equation: y = 35x + 235

plug in 16 to find how many pictures she will have on may 16: y = 35(16) + 235

you get y = 795

for the second part, you know are trying to find how long it will take to get to 1024 pictures, so you know your y, but you don't know your x

your equation: 1024 = 35x + 235

solve to get x = 22.54

this rounds up to 23, so your answer is 23

2. multiply 8 times 4 to get 32

subtract 32 from 82 to fin how many she has left

you get 50

for the second part, divide 82 by 4 to find how many day it will take to finish her candy

you get 20.5

so no, she will not have candy to share with her cousins, and she will finish her candy on November 21

3. for this, you have a negative y intercept since you need to make $24 to start profiting

your equation: y = 6x - 24

plug in 50 to x: y = 6(50) - 24

you get y = 276

so you make $276 with 50 cars

for the second part, plug in 400 to y: 400 = 6x - 24

solve to get x = 70.66

this rounds up to 71, so your answer is 71

3 0
3 years ago
Billy ate 1/3 of a bag of sunflower seeds each day for 5days.How many bags of sunflower seeds did he eat ?
Semenov [28]
1 and 2/3 bags of sunflower seeds.
5 0
3 years ago
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A square has side length (7 x − 2) inches. what is the area of the square?
Aneli [31]

Answer:

49x^2 - 28x + 4

Step-by-step explanation:

(7x - 2)(7x - 2)

Because squares have the same length of sides.

49x^2 - 28x + 4

7 0
3 years ago
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