Reflection over the y-axis:
(x, y) ⇒ (-x, y)
Reflection of that over the line y = x:
(-x, y) ⇒ (y, -x)
Rotation counterclockwise by 270°:
(x, y) ⇒ (y, -x) . . . . . . equivalent to reflection over y, then over y=x.
The appropriate choice is ...
C) Reflecting over the y-axis and then reflecting over the line y = x.
Answer:
Part A: C. 4 to 1
Part B: 2
Step-by-step explanation:
<h3>Part A: </h3>
What is the ratio of the number of students receiving a C and the number of students receiving an A?
<u>As per table given:</u>
- 12 students received a C and 3 students received a A
The ratio C/A is:
The correct answer choice is:
<h3>Part B: </h3>
Complete the statement:
For every student receiving a D, ______ students received a B.
<u>As per table given:</u>
- 4 students received a D and 8 students received a B
<u>The ratio D/B is:</u>
<u>The statement is:</u>
- For every student receiving a D, 2 students received a B.
Answer:
b = 55°
Step-by-step explanation:
The angle at the centre is twice the angle on the circle subtended by the same arc, then
a = 0.5 × 110° = 55°
Angles on the circumference subtended by the same arc are congruent, so
b = a = 55°
Answer:
The value of the test statistic is 
Step-by-step explanation:
The null hypothesis is:
The alternate hypotesis is:
Our test statistic is:
In which X is the sample mean, 
is the null hypothesis value, 
is the standard deviation and n is the size of the sample.
In this problem:
So
The value of the test statistic is
-3/2 , -3/7 , 0.75 , 2 i'm pretty sure this is right!
