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3 years ago

PLEASE HELP! I really need to get this right

Mathematics

2 answers:

Naily [24]3 years ago

8 0

Answer:

27.3

Step-by-step explanation:

27.3

Nat2105 [25]3 years ago

7 0

Answer:

Plays a musical instrument

Top left

Plays a sport: 0.46

Plays a musical instrument

Top right

Does not Play a sport: 0.54

Does not play a musical instrument

Bottom Left

Plays a sport: 0.73

Does not play a musical instrument

Bottom right

Does not Play a sport: 0.27

Step-by-step explanation:

I hope this helps you! :D

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kiruha [24]

Answer:

No solution

Step-by-step explanation:

We have

$\sum_{x=8}^{4}x^2 + 9\left(\dfrac{\cos^2(\infty)}{\sin^2(\infty)} \right)$

For the sum it is not correct to assume

$\sum_{x=8}^{4}x^2= 8^2 + 7^2+6^2+5^2+4^2 = 64+49+36+25+16 = 190$

Note that for

$\sum_{x=a}^b f(x)$

it is assumed $a\leq x \leq b$ and in your case $\nexists x\in\mathbb{Z}: a\leq x\leq b$ for $a>b$

In fact, considering a set $S$ we have

$\sum_{x=a}^b (S \cup \varnothing) = \sum_{x=a}^b S + \sum_{x=a}^b \varnothing$ that satisfy $S = S \cup \varnothing$

This means that, by definition $\sum_{x=a}^b \varnothing = 0$

Therefore,

$\sum_{x=8}^{4}x^2 = 0$

because the sum is empty.

For

$9\left(\dfrac{\cos^2(\infty)}{\sin^2(\infty)} \right)$

we have other problems. Actually, this case is really bad.

Note that $\cos^2(\infty)$ has no value. In fact, if we consider for the case

$\lim_{x \to \infty} \cos^2(x)$ , the cosine function oscillates between $[-1, 1]$ , and therefore it is undefined. Thus, we cannot evaluate

$9\left(\dfrac{\cos^2(\infty)}{\sin^2(\infty)} \right)$

and then

$\sum_{x=8}^{4}x^2 + 9\left(\dfrac{\cos^2(\infty)}{\sin^2(\infty)} \right)$

has no solution

7 0

3 years ago

1/10 of ____ is 10 times as much as 8

Vanyuwa [196]

The answer is 800.
To find this, multiply 10 times 8 to find the number you are dividing. (80) now, multiply 80 by 10. (800)
<span>1/10 of 800 is 80, which is ten times as much as 8.</span>

8 0

3 years ago

Kyle has a notebook for each of his 5 classes. he puts 6 stickers on each notebook. there are 10 stickers on each street. how ma

larisa86 [58]

Well if he puts 6 on each of the 5 notebooks, you'd do 5*6 and get 30. If 10 are on each sheet you'd do 30/10 & end up with 3 sheets of stickers :)

3 0

3 years ago

I need help fast and the rite answer please

kipiarov [429]

Answer:

Step-by-step explanation:

7 0

3 years ago

What expression is equivalent to -28xy+35y

Tasya [4]

Multiply -28 by 35 and you will then get the answer

8 0

3 years ago

Read 2 more answers