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3 years ago

A man selling computer parts realizes that when

1 answer:

7 0

The seller must charge a one-time fee:
y=one-time fee
x=profit for each computer part
we would have to compute the following system of equations:
y+16x=$1700
y+56x=$4300

We can solve this system by substitution method

y+16x=$1700 ⇒y=$1700-16x
y+56x=$4300
($1700-16x)+56x=$4300
40x=$4300-$1700
40x=$2600
x=$2600/40
x=$65

we find out the value of "y"

y=$1700-16x
y=$1700-16($65)
y=$1700-$1040
y=$660
if we would sell 30 computers parts the profit would be: 30x+y
profit if the man sells 30 computers parts=30($65)+$660=$2610

answer: his earning will be $2610

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The expression 6s^2 can be used to find the surface area of a cube whose side length is s. Find the

devlian [24]

The answer is:

6s^2

6(4)^2

6(16)

The answer is 96

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3 years ago

Estimate the addition by rounding each number to the nearest hundred thousand. Then find the sum. Estimate: 229,275 +115,368 344

kvasek [131]

Answer:

600,000

Step-by-step explanation:

When rounding to the nearest 100,000 if it's X50,000 you round up 1 for the X, if it's X49,999 or less you keep the X as is.

229,275 rounding to the hundred thousand would be 200,000

115,368 would be 100,000

344,633 would be 300,000

so 200,000+100,000+300,000 = 600,000

6 0

4 years ago

Please help me with precalculus?? linear and angular speed

Anit [1.1K]

13)

there are 2π radians in 1 revolution, and there are 60 seconds in 1 minute, so keeping that in mind, then,

$\bf \cfrac{4\underline{\pi} }{5~\underline{s}}\cdot \cfrac{rev}{2\underline{\pi} }\cdot \cfrac{60~\underline{s}}{min}\implies \cfrac{4\cdot 60~rev}{5\cdot 2~min}\implies \cfrac{240~rev}{10~min}\implies 24\frac{rev}{min}$

14)

$\bf \textit{linear velocity}\\\\
v=rw\quad 
\begin{cases}
r=radius\\
w=angular~speed\\
----------\\
v=32\frac{m}{sec}\\
w=100\frac{rev}{min}
\end{cases}\\\\
-------------------------------\\\\
\textit{let's convert \underline{w} to }\frac{radians}{sec}$

$\bf \cfrac{100~\underline{rev}}{\underline{min}}\cdot \cfrac{2\pi }{\underline{rev}}\cdot \cfrac{\underline{min}}{60~sec}\implies \cfrac{100\cdot 2\pi }{60~sec}\implies \cfrac{10\pi }{3~sec}\implies \cfrac{10\pi }{3}\frac{radians}{sec}\\\\
-------------------------------\\\\
v=rw\implies \cfrac{v}{w}=r\implies \cfrac{\frac{30~m}{sec}}{\frac{10\pi }{3~sec}}\implies r=\cfrac{30~m}{\underline{sec}}\cdot \cfrac{3~\underline{sec}}{10\pi }
\\\\\\
r=\cfrac{90}{10\pi }m$

15)

what is the radians per seconds "w" in revolutions per minute? just another conversion like in 13)

$\bf \cfrac{\underline{\pi} }{3~\underline{sec}}\cdot \cfrac{rev}{2\underline{\pi }}\cdot \cfrac{60~\underline{sec}}{min}\implies \cfrac{60 ~rev}{3\cdot 2 ~min}\implies \cfrac{60 ~rev}{6 ~min}\implies 10\frac{rev}{min}$

4 0

4 years ago

Leila purchased a pre paid phone card for $25. Long distance calls cost 22 cents a minute using this card. Leila used her card o

slamgirl [31]

Answer:

Leila's call lasted for 25 minutes.

Step-by-step explanation:

inital amount - (0.22 * minutes on the phone) = final amount

25 - 0.22x = 19.5

Solve for x

Subtract 25 from both sides

-0.22x = -5.5

Divide both sides by -0.22

x = 25

6 0

4 years ago

I need help factoring this problem out

kvv77 [185]

Got you fam (5x+1)(2x-5)

4 0

3 years ago

Read 2 more answers