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3 years ago

5-minute call costs $5.91 and a 10-minute call costs $10.86. what is the rate of change

Mathematics

1 answer:

KatRina [158]3 years ago

3 0

Answer:

0.96 cents

Step-by-step explanation:

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Solve each formula for the specified variable

lord [1]

Answer:

$\frac{A-2wh}{2(w+h)}=l$

Step-by-step explanation:

We have to find the formula for the value of 'l'.

So, we will isolate 'l' on one side of the formula.

A = 2lw + 2lh + 2wh

A = 2l(w + h) + 2wh

A - 2wh = 2l(w + h) + 2wh - 2wh

A - 2wh = 2l(w + h)

$\frac{A-2wh}{2(w+h)}=\frac{2l(w+h)}{2(w+h)}$

$\frac{A-2wh}{2(w+h)}=l$

Therefore, formula for 'l' will be,

$\frac{A-2wh}{2(w+h)}=l$

4 0

2 years ago

Which of the following is a nonlinear function?

Troyanec [42]

i think its C im half of one hundered % sure its that

7 0

2 years ago

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A function where the independent variable is an exponent. f(x) = ab^x, where a and b are real numbers with a # 0, b>0, and b

Alex787 [66]

Answer:

Step-by-step explanation:

C, the answer is exponential function

3 0

2 years ago

An electrician charges a set fee of $50 for every house call and then charges an additional hourly rate. One day, the electricia

Serhud [2]

Answer:

$50+5t=C$

Step-by-step explanation:

Suppose the electrician spends t hours at the house working.

Amount charged for every house call by electrician = $50

The electrician earned a total of $400 for a 5 hour job.

Also, C denotes total cost of the electrician's services.

So, the equation for C in terms of t is given below.

$50+5t=C$

Here, $C=400$

7 0

3 years ago

According to the Rational Root Theorem, which number is a potential root of f(x) = 9x8 + 9x6 – 12x + 7?

notsponge [240]

<u>Answer-</u>

$\boxed{\boxed{\frac{7}{3}}}$

<u>Solution-</u>

Rational Root Theorem-

$f(x)=a_nx^n+a_{n-1}x^{n-1}+a_{n-2}x^{n-2}+.......+a_1x+a_0\ \ \ and\ a_n\neq 0$

All the potential rational roots are,

$=\pm (\dfrac{\text{factors of}\ a_0}{\text{factors of}\ a_n})$

The given polynomial is,

$f(x) = 9x^8 + 9x^6-12x + 7$

Here,

$a_n=9,\ a_0=7\\\\\text{factors of}\ 9=1,3,9\\\\\text{factors of}\ 7=1,7$

The potential rational roots are,

$=\pm \frac{1}{1},\pm \frac{1}{3}, \pm \frac{1}{9}, \pm \frac{7}{1}, \pm \frac{7}{3}, \pm \frac{7}{9}$

$=\pm 1,\pm \frac{1}{3}, \pm \frac{1}{9}, \pm 7, \pm \frac{7}{3}, \pm \frac{7}{9}$

From, the given options only $\frac{7}{3}$ satisfies.

6 0

2 years ago

Read 2 more answers