All categories

4 years ago

How to solve the question in the photo please?

Mathematics

2 answers:

OLEGan [10]4 years ago

6 0

Answer:

−1

Step-by-step explanation:

$\frac{cos(3.141593x^{1} }{1^{2} }$

ch4aika [34]4 years ago

3 0

Hijjsjjsjaamakkansnnaksjjfjfg

You might be interested in

May somebody help me please.

MakcuM [25]

The answer is four!!

8 0

3 years ago

In a survey, 18 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped

schepotkina [342]

Answer: 99% confidence interval would be (45.74,54.26).

Step-by-step explanation:

Since we have given that

N = 18

Mean = $50

Standard deviation = $7

At 99% confidence level, z = 2.58

So, Interval would be

$\bar{x}\pm z\dfrac{\sigma}{\sqrt{n}}\\\\=50\pm 2.58\times \dfrac{7}{\sqrt{18}}\\\\=50\pm 4.26\\\\=(50-4.26,50+4.26)\\\\=(45.74,54.26)$

Hence, 99% confidence interval would be (45.74,54.26).

8 0

4 years ago

In △ABC, m∠A=27 °, c=14 , and m∠B=25 °. Find a to the nearest tenth.

Gnesinka [82]

Answer:

a = 8.1

Step-by-step explanation:

Firstly, since we have a triangle, automatically, we have 3 interior angles

Mathematically the sum of these angles = 180

A + B + C = 180

27 + 25 + C = 180

52 + C = 180

C = 180-52

C = 128

We use the sine rule to find a

The sine rule posits that the ratio of a side to the sine of the angle facing that side is equal for all the sides of a triangle

Thus, mathematically according to the sine rule;

c/Sin C = a/Sin A

14/sin 128 = a/sin 27

a = 14sin27/sin 128 = 8.0657

which to the nearest tenth is 8.1

3 0

4 years ago

A doctor prescribes a 300-mg antibiotic tablet to be taken every eight hours. Just before each tablet is taken, 20% of the drug

professor190 [17]

Answer:

So after the second tablet there is 360-mg of drug in the body.

So after the third tablet there is 372-mg of drug in the body.

Step-by-step explanation:

We know that a doctor prescribes a 300-mg antibiotic tablet to be taken every eight hours. Just before each tablet is taken, 20% of the drug remains in the body.

We know that 20%=0.2.

We conclude that after the first pill, 300mg of the drug is in the body.

We have the following formula, to calculate how much mg of the drug is in the body after the second tablet:

$300+20\%\cdot 300=300+0.2\cdot 300=300+60=360$

So after the second tablet there is 360-mg of drug in the body.

We have the following formula, to calculate how much mg of the drug is in the body after the third tablet:

$300+20\%\cdot 360=300+0.2\cdot 360=300+72=372$

So after the third tablet there is 372-mg of drug in the body.

3 0

4 years ago

Which of the following shows 5x + 17 + 8x – 9 + 2y in simplest terms?

son4ous [18]

Answer:

5x+8x+17-9+2y

13x+8+2y

3 0

3 years ago

Read 2 more answers