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3 years ago

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.

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The cloth shop has announced a reduction in price by 25%. How many shirts priced at Rs 28 should buy to avail a total reduction

Drupady [299]

Answer:

At least 6 shirts should be brought to avail a total reduction of Rs 40.

Step-by-step explanation:

The marked price of each shirt = Rs 28

Discount offered = 25%

So, 25% of marked price 28 = $\frac{25}{100} \times 28 = 7$

⇒Reduction on each shirt is Rs 7

Now, total amount reduction needed = Rs 40

So, number of shirts purchased = $\frac{\textrm{Total reduction needed}}{\textrm{Reduction on each shirt}}$

= 40 Rs /7 Rs = 5. 71 ≈ 6

So, at least 6 shirts should be brought to avail a total reduction of Rs 40.

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3 years ago

If two pieces of data were added to 2/8 how would the median of the line plot be affected

galina1969 [7]

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7 0

3 years ago

Jessica uses a 20% off coupon when she buys a new camera. The original price of the camera was $150. How much money does Jessica

Luden [163]

Answer:

Step-by-step explanation:

150x .2= 30

3 0

3 years ago

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Identify the type of function that models the situation below: The cost of mailing a letter is $0.37 for the first ounce and $0.

Gwar [14]

Answer:

The correct option is;

Step function

Step-by-step explanation:

The given information are;

The cost of mailing a letter for the first ounce= $0.37

The cost for each additional ounce = $0.23

Therefore, the cost of mailing a letter can be found from the relation;

y = (N-1) × $0.23 + $0.37

The step function can be represented as follows;

f(x) = a[b(x - h)] + k

Where;

(h. k) = The starting points

a = The vertical step separation

b = The horizontal step separation

Therefore, in the question, we have;

a = $0.23

b = 1

h = 1

k = $0.37

Which gives;

f(x) = $0.23 × [1(x - 1)] + $0.37 = $0.23 × (x - 1) + $0.37

f(x) = $0.23 × (x - 1) + $0.37 which is similar to y = (N-1) × $0.23 + $0.37

Therefore the function that models the situation is step function.

8 0

3 years ago

Pls show steps and explain

Anvisha [2.4K]

Answer:

3x+30= 116° 2x=64°

Step-by-step explanation:

the angle below 2x is the same as 3x+20 so we know that 5x+20=180 so solve this

5x+20=180

5x=160

x=32

sub x into the angle equations

3(32)+20=116

2(32)=64

8 0

3 years ago

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