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3 years ago

Need answer help please

Mathematics

1 answer:

marusya05 [52]3 years ago

5 0

Answer:

23.430749028 rounded to

23.4

Step-by-step explanation:

We use the Pythagoras theorem stating

c² = a² + b²

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What is -9+8x=-10y equals

dlinn [17]

Your answer would be Y=-8x-9/10

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3 years ago

A particular amusement park ride will make 156 revolutions in 180 sec at this rate how many revolutions will it take to make 2 m

Nadya [2.5K]

104 revolutions in two minutes.

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3 years ago

What are the parents points for the equation f(x) = 3^x?

ryzh [129]

Answer:

(0, 1) and (1, 2)

Step-by-step explanation:

${ \rm{f(x) = {3}^{x} }}$

• Assume f(x) is one

${ \rm{ {3}^{x} = 1}}$

• Apply logarithms:

${ \rm{x log(3) = log(1) }} \\ \\ { \rm{x = 0 }}$

• Assume f(x) is 2

${ \rm{x = \frac{ log(2) }{ log(3) } }} \\ \\ { \rm{x = 1}}$

3 0

2 years ago

If sin x=2/9,x, in quadrant i, then find(without findingx): sin(2x), cos(2x), tan(2x)

Sergio039 [100]

We have that
<span>sin x=2/9

we know that
sin</span>² x+cos² x=1---------> cos² x=1-sin² x-----> cos² x=1-(2/9)²
cos² x=1-(4/81)------> (81-4)/81-----> 77/81
cos x=√(77/81)

Sin 2x = 2 sin x cos x-------> 2*(2/9)*(√(77/81))----> (4/81)*√77---> 0.43

Sin 2x=0.43
so
cos² 2x=1-sin² 2x---------> 1-[0.43]²-----> 1-[0.1878]----> 0.81
cos² 2x=0.81-----------> cos 2x=0.9

tan 2x=sin 2x/cos 2x--------> tan 2x=0.43/0.9---------> tan 2x=0.48

the answers are
sin 2x=0.43
cos 2x=0.9
tan 2x=0.48

8 0

4 years ago

1. Calculate the slope between the two points (2,5) and (-3,-4).

Oksana_A [137]

To find the slope of thine that passes through these points, use the slope formula. It can be read as “slope equals the second y-coordinate minus the first y-coordinate over the second x-coordinate minus the first x-coordinate.”

So we have $\frac{-4 - 5}{-3 - 2}$ and this simplifies to -9/-5 or 9/5.

Remember, a negative divided by a negative is a positive.

4 0

4 years ago