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Simora [160]
3 years ago
6

What is the square root of 49

Mathematics
2 answers:
stira [4]3 years ago
7 0
The square root of 49 is 7

Airida [17]3 years ago
3 0
The square root of 49 is 7 because 7*7=49. :D
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An experiment involves selecting a random sample of 256 middle managers for study. One item of interest is their annual incomes.
lesantik [10]

Answer:

the standard error is 153.125

Step-by-step explanation:

given that

The random sample is 256

The sample mean is $35,420

And, the standard deviation is $2,450

We need to find out the standard error

We know that

= standard deviation ÷ √random sample

= 2450 ÷ √256

= 2450 ÷ 16

= 153.125

Hence, the standard error is 153.125

7 0
3 years ago
Find the volume of a rectangular prism with the width of x-1, a length of x+1 and a height of 2x-3.
Damm [24]

Answer:

The Volume is equal to 2x^3-3x^2+2x-3

Step-by-step explanation:

Formula for the volume of a rectangular prism is V=WHL

We know that:

W=x-1

L=x+1

H=2x-3

So, V= (x-1)(x-1)(2x-3)

Simplify

(x^2+1)(2x-3)

2x^3-3x^2+2x-3

8 0
3 years ago
You just obtained a credit card. You immediately purchase a stereo system for $200. your credit limit is $1000. Let's assume tha
deff fn [24]

Answer:

i think the answer is:

<u> B. 0.0142</u>

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Which expression is equivalent to 7a^2b + 10a^2b^2 + 14a^2b^3?
vladimir1956 [14]
7a^2b + 10a^2b^2 + 14a^2b^3 =
a^2b (7 + 10b + 14b^2) <==
3 0
3 years ago
Read 2 more answers
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
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