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2 years ago

In right triangle PQR , PQ=12 cm and QR=5cm .What is cos R?

Mathematics

1 answer:

Juliette [100K]2 years ago

7 0

Answer:

cosR = $\frac{5}{13}$

Step-by-step explanation:

assuming the right triangle has ∠ Q = 90° with legs 5 and 12

then this is a 5- 12- 13 right triangle with hypotenuse PR = 13 cm

then

cosR = $\frac{adjacent}{hypotenuse}$ = $\frac{QR}{PR}$ = $\frac{5}{13}$

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Solve the equation. Round the answer to the nearest tenth.

VMariaS [17]

$1,04x+3,14=7,98\ \ \ \ \ | subtract\ 3,14\\\\
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3 years ago

In 2009, there were 1570 bears in a wildlife refuge. In 2010, the population had increased to

natita [175]

Answer:

$8,101\ bears$

Step-by-step explanation:

we know that

In this problem we have a exponential function of the form

$y=a(b)^{x}$

where

x ----> is the number of years since 2009

y ----> is the population of bears

a ----> is the initial value

b ---> is the base

step 1

Find the value of a

For x=0 (year 2009)

y=1,570 bears

substitute

$1.570=a(b)^{0}$

$a=1.570\ bears$

$y=1.570(b)^{x}$

step 2

Find the value of b

For x=1 (year 2010)

y=1,884 bears

substitute

$1,884=1.570(b)^{1}$

$b=1,884/1.570$

$b=1.2$

The exponential function is equal to

$y=1.570(1.2)^{x}$

step 3

How many bears will there be in 2018?

2018-2009=9 years

For x=9 years

substitute in the equation

$y=1.570(1.2)^{9}$

$y=8,101\ bears$

7 0

3 years ago

What about these just making sure...

arlik [135]

Yes. They are all correct. Good job

6 0

3 years ago

I need help with two questions, and an explanation on how to do them please

Lilit [14]

$39 multiply that by 1/3 OR 39 divide that by 3 . That will get 13 .

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Add 13 and 9.75

13+9.75=22.75

Now you subtract 39 - 22.75

You will get 16.25

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3 years ago

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Alborosie

Answer:

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2 years ago

Read 2 more answers