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3 years ago

Select all the fractions that are equivalent to -2/3 .

Mathematics

1 answer:

mote1985 [20]3 years ago

6 0

Answer:

A) -3/2 = False

B) -2/-3 = False

C) 2/-2 = False

D) -3/-2 = False

E) - 2/3 = True

F) 2/3 = False

Step-by-step explanation:

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emmainna [20.7K]

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3 years ago

Use a graphing calculator to solve the equation -2sin(theta)= 1.2 in the interval from 0 to 2pi.

elena-s [515]

Answer:

$\theta=\pi +arcsin(\frac{3}{5})\approx 3.785\\\\\theta=2\pi -arcsin(\frac{3}{5} ) \approx 5.64$

Step-by-step explanation:

As you can see from the graph I attached you, the possible solutions in the interval from 0 to 2π are approximately:

$\theta=3.7\\\\and\\\\\theta=5.7$

So, it's useful to solve the equation too, in order to verify the result:

$-2sin(\theta)=1.2\\\\sin(\theta)=-\frac{3}{5}$

Taking the inverse sine of both sides:

$\theta=\pi +arcsin(\frac{3}{5})\approx 3.785\\\\\theta=2\pi -arcsin(\frac{3}{5} ) \approx 5.64$

Using this result we can conclude the solutions in the interval from 0 to 2π are approximately:

$\theta\approx 3.785\\\\\theta \approx 5.64$

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3 years ago

When I double this number I get 50 whats my number

Kipish [7]

Answer:

It says double, so it means that:

_____ x 2 = 50

In order to find _____, you must reverse the equation.

50 / 2 = _______

This means that:

50 / 2 = 25

So, ______ = 25

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4 years ago

Read 2 more answers

If f(x)= {2 for x>0, 0 for x=0, , then what is the value of -2 for x<0, f(7)-f(-4)?

marysya [2.9K]

Are you sure you've written the problem right...it says x can not equal 0 or 1

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3 years ago

Ben also participated. He fell down midway, and had to walk part of the distance. Still, he finished the distance! It took him e

sammy [17]

Answer:

0.56 m/s

Step-by-step explanation:

The average speed of a body tells how fast is the body moving; it is calculated as:

$v=\frac{d}{t}$

where

d is the distance covered

t is the time elapsed

In this problem, we don't know the distance covered by Ben. Therefore, we will assume that it is 1 km:

d = 1 km = 1000 m

The time elapsed to cover this distance is:

$t=30 min \cdot 60 =1800 s$

Therefore, Ben's average speed is:

$v=\frac{1000}{1800}=0.56 m/s$

3 0

3 years ago