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3 years ago

8

A race is 10 kilometers long. Markers will be placed at the beginning and end of the race course and at each 500 meter mark. How

many markers are needed to mark the course for the race.

1 answer:

spayn [35]3 years ago

3 0

The answer is 20. You use 20 markers for it all.

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2x -9 < 7<br> Please answer

Marysya12 [62]

Answer:

18(<) 7= False

Step-by-step explanation:

1)-9×2=18

2)18(<) 7

3) The equation is Fasle.

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2 years ago

14. This week, Anita spent 3 1/2 h practicing the piano. She also spent 6 1/4 h at soccer practice and 4 1/3 h on the telephone.

bixtya [17]

A is 9 3/4 hours. 2/4 equals a half so 1/2 +1/4 equals 3/4

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3 years ago

How does the graph of g(x)=⌈x⌉+0.5 differ from the graph of f(x)=⌈x⌉?

katovenus [111]

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3 years ago

Read 2 more answers

Ema had 2/8 of a cookie, she wanted to share the rest of it equally with her friend; how many pieces will each friend get?

Nostrana [21]

Answer:0.125 or 1/8

Step-by-step explanation:

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2 years ago

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

3 years ago