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mihalych1998 [28]

4 years ago

11

12.

1 answer:

pashok25 [27]4 years ago

8 0

<span>Last year, the average math SAT score for students at one school was 475. The headmaster then introduced a new teaching method hoping to improve scores. This year, the mean math SAT score for a sample of students was 491. The headmaster concluded that the new teaching method produces higher SAT scores. The problem with reporting results this way is voluntary response. The information of how the teaching method isnot mentioned.</span>

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Look at the triangle show on the right. The Pythagorean Theorem states that the sum of the squares of the legs of a right triang

Vladimir [108]

Answer:

$cos^2\theta + sin^2\theta = 1$

Step-by-step explanation:

Given

$(\frac{b}{r})^2 + (\frac{a}{r})^2$

Required

Use the expression to prove a trigonometry identity

The given expression is not complete until it is written as:

$(\frac{b}{r})^2 + (\frac{a}{r})^2 = (\frac{r}{r})^2$

Going by the Pythagoras theorem, we can assume the following.

a = Opposite
b = Adjacent
r = Hypothenuse

So, we have:

$Sin\theta = \frac{a}{r}$

$Cos\theta = \frac{b}{r}$

Having said that:

The expression can be further simplified as:

$(\frac{b}{r})^2 + (\frac{a}{r})^2 = 1$

Substitute values for sin and cos

$(\frac{b}{r})^2 + (\frac{a}{r})^2 = 1$ becomes

$cos^2\theta + sin^2\theta = 1$

3 0

4 years ago

John and Kamira are playing a game. John scores - 5 in the first round, while Kamira scores 7.

disa [49]

Answer:

the sum of John's score and Kamira's score

Step-by-step explanation:

-5 + 7 = 2

8 0

4 years ago

What is 5(x-1)= 20(x-10)

Dmitry [639]

X = 41/5 or 8 1/5 my guyyyyyyyy

7 0

4 years ago

Read 2 more answers

the wrapper indicated that there were 3 1/2 servings of French fries per package. how many packages are needed to serve 16 peopl

Brrunno [24]

Answer:

5 packages

Step-by-step explanation:

if there is 3.5 servings per package then you just divide 16 by 3.5 and you get 4.57 but you cant buy half a package so its 5

3 0

3 years ago

Read 2 more answers

A bus traveled south for 520 kilometers. The entire trip took 3 hours. Calculate the velocity.

In-s [12.5K]

Answer:

A bus traveled south for 520 kilometers. The entire trip took 3 hours. Calculate the velocity.

Step-by-step explanation:

A bus traveled south for 520 kilometers. The entire trip took 3 hours. Calculate the velocity.

5 0

3 years ago