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3 years ago

Jennifer spent $100 at the mall, during tax free weekend.

Mathematics

1 answer:

zhenek [66]3 years ago

8 0

Answer:

A.75%

Step-by-step explanation:

55+20=75 and the other percentage is 25

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Uuuummm I think it’s a carrot?

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3 years ago

Read 2 more answers

Multipy the expreshions (2h+2.7) (2h-27)

Musya8 [376]

Answer:

$4h^2-48.6h-72.9$

Step-by-step explanation:

$(2h+2.7) (2h-27)\\4h^2-54h+5.4h-72.9\\4h^2-48.6h-72.9$

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3 years ago

If you help me i give 100 pts

fenix001 [56]

Answer:

ANSWER:

450

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2 years ago

If a constant of proportionality is 1/5, what would the new constant of proportionality be if the x and y axes were flipped? (an

mixas84 [53]

Answer:

5/1 or 5

Step-by-step explanation:

don't take my word for it but if i understand correctly all you have to do is flip the 1 and 5 which is called the recipicoal

8 0

3 years ago

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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

2 years ago