MATHEMATICS HIGH SCHOOL

Howdy! Id love to have these questions answered asap! Thank you for the help! 1) Which angle is not coterminal to 120 degrees?
A. 840
B. -180
C. 480

2) Use the unit circle and the reference angle to determine which of the following trigonometric values is correct when theta = -90
A. Cos theta = undefined
B. Sin theta = -1
C. Tan = 0

Answers

Answer 1

Answer:

Answer:

1. B.

2. B.

Step-by-step explanation:

Trigonometry

1) Coterminal angles can be found by adding or subtracting 360° (or 2\pi radians) to a given angle. If we have 120°, adding 360° gives 480°, adding again 360° gives 840°. There is no way to get -180°, so this option is not a coterminal angle to 120°

A. $Cos (-90^o)=0$ , and not undefined

B. $Sin (-90^o)=-1$ . This is correct

C. $Tan (-90^o)$ is undefined, not zero

Thus the only correct option is B.

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The first three steps for solving the quadratic equation by completing the square are shown. Fill in the missing number in the last step.9x2 +54x = 7 9(x2 + 6x) = 7 9(x2 + 6x + 9) = 7 +.?
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Identify the explanatory and response variables in the following situation:There is a strong negative correlation between latitude above the equator and average temperature on December 21.

A: Explanatory: Latitude
Response: Daylight hours
B. Explanatory: Latitude
Response: Average temperature
C. Explanatory: Daylight hours
Response: Latitude
D. Explanatory: Time of year
Response: Daylight hours

Answers

Negative correlation refers to an inverse relationship between two variables. When one variable increases, the other decreases.

The variables are latitude and average temperature.

The explanatory variable is latitude and the response is the average temperature. Choice B.

As the latitude increases, the average temperature decreases. This is a strong negative correlation of between the two variables.

The best answer would be letter B. The explanatory variable in the situation given above would be the latitude, while the response variable would be the average temperature. The explanatory variable is another term for the independent variable while the response variable is another term for dependent variable.

Please please I need help

Answers

Answer:

Step-by-step explanation:

32 km/hr, if it takes 1/4 of an hour (.25) for 8 km, then it will take 4/4 of an hour (one hour) for 32 km. Looking at it in a ratio helps

Six boxes of crackers cost $18. At this
price, how much do 15 boxes cost?

Answers

Answer:

6x3=18 and 15x3= 45 so 45 is the answer.

Step-by-step explanation:

Answer:

Step-by-step explanation:

18 divided by 6 is 3. and 3 times 15 is 45. And to check it do 45 divided by 15 and you get 3. so 45 is the answer.

Combine like terms. 7k – 13k

A.
–6

B.
–6k

C.
–20

D.
–20k

Answers

Answer is B.7k-13k=-6kWhich is B. So answer is -6k

Need help asap pls pls pls

Answers

Answer:

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Step-by-step explanation:

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If Saturn's mass is 5.685 · 10^26 kilograms and Mercury's is 3.302 · 10^23 kilograms Approximate how many times greater Saturn's mass is than Mercury's.?

Answers

do the division
(5.685 * 10^26) / (3.302*10^23)

= 1.722 * 10^3

or 1722 times greater

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