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
ycow [4]
3 years ago
7

Let cos(−θ)=−3/5 and tanθ>0 .

Mathematics
1 answer:
Gnom [1K]3 years ago
4 0

Answer:

A

Step-by-step explanation:

The cosine of a right triangle is the adjacent over the hypotenuse. If the cosine is -3/5 then it must be a right triangle with sides 3, 4, & 5 since this is a Pythagorean triple. This means the sin will be -4/5. We know its negative because the tangent is positive so this is the 3rd quadrant where both Sine and Cosine are negative.



You might be interested in
Two intelligent, honest students are sitting together at lunch one day when their math teacher hands them each a card. “your car
Lady bird [3.3K]
Answer: The loser's card shows 6.

Explanation: Let's start by naming the first student A and the second student B.
Since the product of A and B are either 12, 15, or 18, let's list every single possibility, the first number being A's number and the second number being B's number.

1     12
1     15
1     18
2     6
2     9
3     4
3     5
3     6
4     3
5     3
6     2
6     3
9     2
12  1
15  1
18  1

Now, the information says that A doesn't know what B has, so we can immediately cross off all of the combinations that have the integer appearing once and once ONLY off, because if it happened once only, A would know of it straight away. Now, our sample space becomes much smaller.

1     12
1     15
1     18
2     6
2     9
3     4
3     5
3     6
6     2
6     3

Using this same logic, we know that we can cross off all of the digits that occur only once in B's column.

2     6
3     6

Now, A definitely knows what number B has because there is only one number left in B. Hence, we can conclude that the loser, B, has the integer 6.
4 0
3 years ago
For a specific species of fish in a pond, a wildlife biologist wants to build a regression equation to predict the weight of a f
sashaice [31]

Answer: First of all, we will add the options.

A. Yes, because 3 inches falls above the maximum value of lengths in the sample.

B. Yes, because the regression equation is based on a random sample.

C. Yes, because the association between length and weight is positive.

D. No, because 3 inches falls above the maximum value of lengths in the sample.

E. No, because there may not be any 3-inch fish of this species in the pond.

The correct option is D.

Step-by-step explanation: It would not be appropriate to use the model to predict the weight of species that is 3 inches long because 3 inches falls above the maximum value of lengths in the sample.

As we can see from the question, the model only accounts for species that are within the range of 0.75 to 1.35 inches in length, and species smaller or larger than that length have not been taken into consideration. Therefore the model can not be used to predict the weights of fishes not with the range accounted for.

3 0
3 years ago
I’m stuck on this one- sorry if I’m annoying lol
Hunter-Best [27]

Answer:

The first statement: "Her first mistake was in Step 2. She added 0.2 to each term instead of multiplying by 0.2."

8 0
3 years ago
Can someone please tell the answers to all of the questions I don’t understand them
Butoxors [25]

Hey

Question 1: For this one, we simply need to look at the "fat grams over 25" and the "Total" sections. We can see that 27 out of 50 have fat grams over 25. This written as a percentage is: 54%

Question 2: Using the same logic above we conclude the answer is 45.45%

Question 3: For this we need to look at the "total" section and the answer is 50

Question 4: We add all the "over 300" and write it as a percentage out of 50 which is 14%

Question 5: Same as #1 answer is 21%

Hope this helps

3 0
3 years ago
Help me plsss ASAP<br> Quickly
Lera25 [3.4K]

Answer:

7

Third answer is correct.

Step-by-step explanation:

{7}^{1}   = 7

hope this helps you.

7 0
3 years ago
Other questions:
  • If I left alabama at 10:00 am what time would I arrive in California if I drove
    12·1 answer
  • A hacker is trying to guess someone's password. the hacker knows (somehow) that the password is 12 characters long, and that eac
    15·1 answer
  • Which equation represents a line that passes through (4, 5) and has a slope of 3/4
    11·1 answer
  • Evaluate the expression when a=2 and x= -3
    13·1 answer
  • POLYGONS AND CIRCLES
    13·1 answer
  • Which expression completes the table?
    6·2 answers
  • Round the following 25.635 to 2 d.p <br><br>315.239 to 1 dp<br><br>0.3975 to 3dp <br>14.989 to 1 dp
    13·1 answer
  • Answer this math question for 10 points
    11·1 answer
  • −2(5d−9f)+7f−10(−9f−7d)
    8·1 answer
  • HELP ME ASAP PLSLSLSS HELP MEEE IMA CRY
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!