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Travka [436]
2 years ago
12

Solve it guys !????q.no 1 .b ​

Mathematics
1 answer:
saw5 [17]2 years ago
4 0

Answer:

C

Step-by-step explanation:

the answer is C sense that makes the most sense with the problem

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3x^2+7x=30______________
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Answer:

if you need help with problems like that I suggest algebra calculator or math away

8 0
3 years ago
Read 2 more answers
Pls answer quickly as possible
Paraphin [41]

Your answer will be X = 11 over 2, if that's a 2 over 5 in the beginning of the problem

6 0
3 years ago
A landscape supply business $30 to deliver mulch. The cost of the mulch is $23 per cubic yard. Write and solve a linear equation
Andru [333]
The answer is $209 bye lol
4 0
2 years ago
<img src="https://tex.z-dn.net/?f=%20%5Clarge%7B%5Cbold%20%5Cred%7B%20%5Csum%20%5Climits_%7B8%7D%5E%7B4%7D%20%7Bx%7D%5E%7B2%7D%2
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
PLEASE HELP ASAP, HAVE TO TURN IN! I only need help with the first equation.
Gennadij [26K]

Answer:

x1 = 0, x2 = -7

Step-by-step explanation:

...........

8 0
3 years ago
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