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2 years ago

5

The late fee for libary books is $2 plus 15 cents each day for a book that is late. if monicas late fee is $2.75, write and solv

e a linear equation to find how many days her book is

1 answer:

r-ruslan [8.4K]2 years ago

7 0

2+0.15x=2.75 is the equation
x=5 (days)

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Marina86 [1]

Answer:

$\large{\textbf{f(g(x)) = 20}\\}$

Step-by-step explanation:

$\large{\textup{Given}:\\$f(x) = 5x $ \hspace{5mm} \& \hspace{5mm} $g(x) = 4x $\\$$ f \circ g(x) = f(g(x)) $$\\$ \implies f(g(x)) = f(5x) $\\\textup{i.e., To substitute $5x$ instead of $x$ in $f(x)$}\\$\implies f(5(x)) = 4(5(x)) = 20x \\ $\textup{Now,}$f(g(1)) = 20(1) =20$}$

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2 years ago

The radius of Earth is about 3,980 miles. What expression can be used to find the approximate diameter of Earth?

Tatiana [17]

To find the diameter, you use the formula: 2x. we use 2x because the radius is 2 times the diameter.

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2(3,980)

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DIA [1.3K]

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2 years ago

A square with side x is changing with time where x(t)=3t+1. What is rate of change of the area of the square when t=2 seconds.

GuDViN [60]

Answer:

Rate of change of the area of the square is 42 units at t = 2.

Step-by-step explanation:

We note that the area of the square is given by: $A(x) = x^2$ but we aim to find $\frac{dA}{dt}$ . But we can use the chain rule to pull out that dA/dt. Doing so gives us:

$\frac{dA}{dt} = \frac{dA}{dx} \times \frac{dx}{dt}.$

Now, $\frac{dA}{dx} = 2x$ (by the power rule and $\frac{dx}{dt} = 3.$

But since we have "x" and not "t", we want to find what x is when t = 2. Substituting t = 2 gives us x(2) = 3(2) + 1 = 7.

So, finally, we see that:

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3 years ago

What value does the 7 represents in the number 94.087?<br>

Roman55 [17]

0.007, also known as the thousandths place in decimals.

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2 years ago

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