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2 years ago

15

A survey was given to people who own a certain type of car. What percent of the people surveyed were completely satisfied with t

he car?

1 answer:

suter [353]2 years ago

8 0

The blue one completely satisfied

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3х + 1 = -11<br> What is the answer?

Fiesta28 [93]

Answer:

-4

Step-by-step explanation:

3x+1=-11

-1 -1

3x=-12

/3 /3

x = -4

4 0

2 years ago

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Frederick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin.

belka [17]

Answer:

the statements given above are true.

Step-by-step explanation:

Given that Frederick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin.

He spun a 4 five times.

The statements true are:

i) For the experimental outcomes to be closer to the predicted outcome, the number of trials should be increased.

iii) If the number of trials is changed, the experimental probability also changes.

iv) If the number of trials is changed, the predicted number of outcomes also changes.

v) If the number of trials is changed, the number of experimental outcomes also changes.

5 0

2 years ago

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I don't need you to work it out, just theorem(s) i need to reach the answer :)

VikaD [51]

Not sure why such an old question is showing up on my feed...

Anyway, let $x=\tan^{-1}\dfrac43$ and $y=\sin^{-1}\dfrac35$ . Then we want to find the exact value of $\cos(x-y)$ .

Use the angle difference identity:

$\cos(x-y)=\cos x\cos y+\sin x\sin y$

and right away we find $\sin y=\dfrac35$ . By the Pythagorean theorem, we also find $\cos y=\dfrac45$ . (Actually, this could potentially be negative, but let's assume all angles are in the first quadrant for convenience.)

Meanwhile, if $\tan x=\dfrac43$ , then (by Pythagorean theorem) $\sec x=\dfrac53$ , so $\cos x=\dfrac35$ . And from this, $\sin x=\dfrac45$ .

So,

$\cos\left(\tan^{-1}\dfrac43-\sin^{-1}\dfrac35\right)=\dfrac35\cdot\dfrac45+\dfrac45\cdot\dfrac35=\dfrac{24}{25}$

7 0

3 years ago

which uppercase letters will not appear reversed when they are held in front of a mirror? what type of symmetry do these letters

Irina-Kira [14]

A,H,I,M,O,T,U,V,W,X,Y --- these have vertical symmetry

a word whose reflection is also a word....YAM and MAY

3 0

3 years ago

Prove:ABCD is a parallelogram

labwork [276]

Answer:

Given

Step-by-step explanation:

<A and <D are supplementary

7 0

2 years ago