1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
raketka [301]
2 years ago
6

Does sin (-30) equal -sin (30)?

Mathematics
1 answer:
Ivan2 years ago
4 0

Answer:

Step-by-step explanation:

I dont know, sin (-30) might be an error because measures can’t be negative...

You might be interested in
While driving your rental car on your vacation in Europe, you find that you are getting 12.7 km/L of gasoline. What does this va
4vir4ik [10]
Steps: for an approximate result, multiply the fuel economy value by 2.352
12.7*2.352=29.87

Answer: 29.87 Miles per Gallon
7 0
2 years ago
Please help, test review. Need done today
ANTONII [103]
D=number of drinks
p=number of bags of popcorn

75=6d+8p
100.50=12d+10p

multiply first equation by -2 and add to first
-49.50=-6p
divide -6
8.25=p
sub

100.50=12d+10p
100.50=12d+82.50
minus 82.50
18=12d
divide 12
1.50=d

$1.50 per drink

YOU BETTER READ AND LEARN AND NOT JUST USE THIS TO PASS, LEARN

7 0
3 years ago
A physicist examines 25 water samples for nitrate concentration. The mean nitrate concentration for the sample data is 0.165 cc/
xz_007 [3.2K]

Answer:

The 80% confidence interval for the the population mean nitrate concentration is (0.144, 0.186).

Critical value t=1.318

Step-by-step explanation:

We have to calculate a 80% confidence interval for the mean.

The population standard deviation is not known, so we have to estimate it from the sample standard deviation and use a t-students distribution to calculate the critical value.

The sample mean is M=0.165.

The sample size is N=25.

When σ is not known, s divided by the square root of N is used as an estimate of σM:

s_M=\dfrac{s}{\sqrt{N}}=\dfrac{0.078}{\sqrt{25}}=\dfrac{0.078}{5}=0.016

The degrees of freedom for this sample size are:

df=n-1=25-1=24

The t-value for a 80% confidence interval and 24 degrees of freedom is t=1.318.

The margin of error (MOE) can be calculated as:

MOE=t\cdot s_M=1.318 \cdot 0.016=0.021

Then, the lower and upper bounds of the confidence interval are:

LL=M-t \cdot s_M = 0.165-0.021=0.144\\\\UL=M+t \cdot s_M = 0.165+0.021=0.186

The 80% confidence interval for the population mean nitrate concentration is (0.144, 0.186).

6 0
3 years ago
What is the answer to this question?
melisa1 [442]

Answer: I think it is negative.


Step-by-step explanation: When you add a negative to a negative you still have a negative.


7 0
3 years ago
What is the solution to the inequality?<br><br> 4(2x+5)-2x more than or equal to 10
Alexxx [7]
See attached for the solution

4 0
3 years ago
Other questions:
  • HELP PLEASE BE QUICK
    8·1 answer
  • BC is parallel to DE. What is the length of BC?<br><br>A. 8<br>B. 7<br>C. 6<br>D. 9​
    15·2 answers
  • Find the diameter of a circle with an area of 380.13m2
    7·1 answer
  • (5 points)
    13·1 answer
  • PLEASE HELP!!!
    12·2 answers
  • Solve the system of equations​
    6·1 answer
  • What is the polynomial is factored form please help
    8·1 answer
  • Marcy went to gap to buy a new pair of jeans the jeans s were originally $86
    6·1 answer
  • Determine whether the given value is a solution of the equation. 28-w=25; w=3
    15·1 answer
  • Which of the following numbers is between - 3/4 and 5/8 ?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!