Ask question

Ask question

All categories

2 years ago

12

Can someone try and solve this question but like showing how you did it? (Showing work) thanks a lot!!! (Will give 10 points to

whoever can answer first) :DD!!!!!

1 answer:

VashaNatasha [74]2 years ago

4 0

Answer: he spent $90 in total

Step-by-step explanation: adult tickets cost $15 and he bought 4 so 15x4= 60

Child tickets cost $10 and he bought 3 so 10x3= 30

Finally add them together: 60 + 30 = 90

You might be interested in

What is the product of (−4)⋅(−4)⋅(−4)⋅y⋅y using exponents

Amiraneli [1.4K]

Answer:

$(-4)^{3$ * $y^{2}$

This should be right.

3 0

3 years ago

My name is Ann [436]

$f(x) = \frac{lnx}{x}$

(a) $f'(x) = \frac{d}{dx}[\frac{lnx}{x}]$
Using the quotient rule:
$f'(x) = \frac{\frac{1}{x} \cdot x - lnx}{x^{2}}$
$f'(x) = \frac{1 - lnx}{x^{2}}$

For maximum, f'(x) = 0;
$\frac{1 - lnx}{x} = 0$
$lnx = 1, x = e$

(b) <em>Deduce:
</em> $e^{x} \geq x^{e}, x > 0$
<em>
Soln:</em> Since x = e is the greatest value, then f(e) ≥ f(x) > f(0)
$\frac{ln(e)}{e} \geq \frac{lnx}{x}$
$\frac{1}{e} \geq \frac{lnx}{x}$ , since ln(e) is simply equal to 1

Now, since x > 0, then we don't have to worry about flipping the signs when multiplying by x.
$\frac{x}{e} \geq lnx$
$x \geq elnx$
$x \geq ln(x^{e})$

Taking the exponential to both sides will cancel with the natural logarithmic function in the right hand side to produce:
$e^{x} \geq e^{ln(x^{e}})$
$e^{x} \geq x^{e}$ , as required.

3 0

3 years ago

I need help with my assignment but dont know how to do it/ what should i do?

ohaa [14]

Answer:

first explain what you need help with specifically then maybe people can help, to bland of a question

5 0

2 years ago

A refrigerator costs $580 a year to run. A family purchases a new one for $1200 that will save them 22% annually in energy costs

NeTakaya

Answer:

It will take nine years and four months for the refrigerator to pay for itself.

Step-by-step explanation:

The new refrigerator which costs $1200, saves the family 22% annually in energy cost.

Since the old refrigerator costs $580 to run, we want to determine how many years it will take for 22% of $580 per year to make $1200.

22% of $580

= 580 × 0.22

= 127.6

That is, it saved then $127.6 per year.

Now,

$1200/127.6

≈ 9.4

Which means, it will take 9 years and 4 months for the refrigerator to pay for itself.

7 0

3 years ago

Enter a digit in each box to complete the subtraction problem.

elixir [45]

Answer:

I think that in the first 2 boxes its 2 i dont know for the rest though,

Step-by-step explanation:

brainky said "dont say such words here, I'm literally saying nothing rude

6 0

3 years ago