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Alexeev081 [22]

3 years ago

7

A jewelry supply shop buys silver chains from a manufacturer for C dollars each,and then sells the chains at a 40% markup . Writ

e an expression for the retail price of a silver chain

1 answer:

alexandr402 [8]3 years ago

5 0

Answer: f(x)= .40c

If c equals 3 lets:
Substitute C for 3

.40(3) = retail price per each silver

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nekit [7.7K]

1 mile = 1.6 kilometers

multiply 40 mph by 1.6 = 64

car's rate = 64 kilometers per hour

multiply kilometers per hour by 4 = 256

car will travel 256 kilometers in 4 hours

6 0

2 years ago

Read 2 more answers

3.5d + 6.25 = 1 + 5.25d<br><br> The solution is d =

vodka [1.7K]

Answer:

d = 3

Step-by-step explanation:

3.5d + 6.25 = 1 + 5.25d

5.25d - 3.5d = 6.25 - 1

1.75d = 5.25

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4 0

3 years ago

The value of a motorbike depreciates by 32% per year. Work out the current value of a motorbike bought 5 years ago for £3600

DaniilM [7]

$\bf \qquad \textit{Amount for Exponential Decay}
\\\\
A=P(1 - r)^t\qquad 
\begin{cases}
A=\textit{accumulated amount}\\
P=\textit{initial amount}\to &3600\\
r=rate\to 32\%\to \frac{32}{100}\to &0.32\\
t=\textit{elapsed time}\to &5\\
\end{cases}
\\\\\\
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3 0

3 years ago

Stretch your thinking.Rewrite this using the word fewer.Carey reads 10 more pages than lucey

snow_lady [41]

Answer:

Lucy reads 10 fewer pages that Carey

Step-by-step explanation:

The first sentence reads as Carey having more, so Lucy has fewer,

Rewriting it using fewer means that Lucy will be the main subject of the sentence, so Lucy reads 10 fewer pages that Carey is the sentence you want

8 0

2 years ago

The points with coordinates (x, -1), (2,2), and (4,3) lie on the same line. What is the value of x?

borishaifa [10]

Find the slope of the line passing throught the points (2, 2) and (4, 3).

The formula of a slope:

$m=\dfrac{y_2-y_1}{x_2-x_1}$

Substitute:

$m=\dfrac{3-2}{4-2}=\dfrac{1}{2}$

If the point (x, -1) lie on the same line, then the slope of line passing through the points (2, 2) and (x, -1) the same:

Substitute:

$m=\dfrac{-1-2}{x-2}=\dfrac{-3}{x-2}$

We have the equation:

$\dfrac{-3}{x-2}=\dfrac{1}{2}$ <em>cross multiply</em>

$(1)(x-2)=(-3)(2)$

$x-2=-6$ <em>add 2 to both sides</em>

$x=-4$

<h3>Answer: x = -4.</h3>

7 0

2 years ago