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Nat2105 [25]
3 years ago
6

An emperor penguin is 45 inches tall. It is 24 inches taller than a rockhopper penguin. Write and solve an equation to find the

height of a rockhopper penguin. Is your answer reasonable? Explain. Please can anyone help me find what Equation: 45= please
Mathematics
1 answer:
Molodets [167]3 years ago
7 0
E-24=R
45-24=21
R=rock hopper penguin
E=emperor penguin
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After reviewing the results of a math test, the teacher tells the class that those students who completed their review worksheet
Soloha48 [4]

The sampling shows that the conclusion by the teacher is done as D. The teacher conducted an observational study by comparing the performance on the test.

<h3>What is sampling?</h3>

Sampling simply means a process on statistical analysis that's used to take observations about a population.

In this case, the teacher conducted an observational study by comparing the performance on the test of those who completed their review worksheets to those who did not complete their review worksheets.

Learn more about sampling on:

brainly.com/question/17831271

4 0
2 years ago
Please Please Please Please Help Please...
luda_lava [24]

Answer:

sin B= 5/13

tan A= 12/5

cos A=5/14

5 0
3 years ago
2. Following are the marks obtained by a batch of 10 students in a
timurjin [86]

Answer:

Students level of knowledge is higher in accountancy  (Y) compared to statistics (X).

Step-by-step explanation:

The level of knowledge of the students in each subject can be known by comparing the mean score of the subjects.

Marks of the students in statistics (X) are: 63 64 62 32 30 60 47 46 35 28

mean = \frac{63 +64+62+32+30+60+47+46+35+28}{10}

          = \frac{467}{10}

          = 46.7

The mean mark of students in statistics (X) is 46.7.

Marks of students in accountancy (Y) are: 68 66 35 42 26 85 44 80 33 72

mean = \frac{68+66+35+42+26+85+44+80+33+72}{10}

         = \frac{551}{10}

         = 55.1

The mean mark of students in accountancy (Y) is 55.1.

It can be inferred that students level of knowledge is higher in accountancy  (Y) compared to statistics (X).

8 0
3 years ago
Need help with these questions!!! please explain bc I don't really get it!
Oksana_A [137]

Answer:

1. b.  2. a.  3. a.

Step-by-step explanation:

1. (f + g)x = f(x) + g(x)

= x^2 + 2x + 4

(f + g)(-1) =  (f + g)(x)  where x = 1 so it is

(-1)^2 + 2(-1) + 4

=  1 - 2 + 4

= 3.

2.  We find (f o g)(x) by replacing the x in f(x) by g(x):

= √(x + 1) and

(f o g)(3) =  √(3 + 1)

= √4

= 2.

3. (f/g) c  = f(x) / g(x)

= (x - 3)/(x + 1)

The domain is the values of x which give real values of (f/g).

x cannot be - 1 because the denominator x + 1 = -1+1 = 0 and dividing by zero is undefined. So x can be all real values of x except x = -1.

The domain is (-∞, -1) U (-1, ∞)

7 0
3 years ago
Read 2 more answers
Solve the system by finding the determinants and using Cramer's Rule:2x - y = 43x + y = 1D= 10, Dx = 10, Dy=-20Answer: (1, -2)D
Nonamiya [84]

Find out the determinant

we have

2x-y=4

3x+y=1

so

D=(2)(1)-(-1)(3)

D=2+3

D=5

therefore

<h2>the answer is the second option</h2><h2>Verify</h2>

solution (1,-2)

equation 1 -------> 2(1)-(-2)=4 -------> 4=4 is true -----> is ok

equation 2 ------> 3(1)-2=1 -----> 1=1 ----> is true -----> is ok

7 0
1 year ago
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