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Thepotemich [5.8K]
3 years ago
12

Represent the following sentence as an algebraic expression, where "a number" is the

Mathematics
1 answer:
Aneli [31]3 years ago
5 0

Answer: 3 - x

Step-by-step explanation: With

Subtraction be careful. 3 - x is not the same as x - 3. You have to keep the values given in order.

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C) The phone case you want to buy is marked down 30%, and you have a 25% off
Nimfa-mama [501]

Answer: Yes, you can find the original price of the phone case. The phone case was $560

Step-by-step explanation:

42.00 divided by 25% is $168

$168 divided by 30% is $560

5 0
3 years ago
Read 2 more answers
5/4 to 3/8 as a percent change
Digiron [165]
Well, what's the diffrence from 5/4 to 3/8?

\bf \cfrac{5}{4}-\cfrac{3}{8}\qquad \stackrel{\textit{LCD is 8 clearly}}{\implies }\qquad \cfrac{10-3}{8}\implies \cfrac{7}{8}

so, if we take 5/4 to be the 100%, what is 7/8 off of it in percentage anyway?

\bf \begin{array}{ccll}
amount&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
\frac{5}{4}&100\\\\
\frac{7}{8}&x
\end{array}\implies \cfrac{\quad \frac{5}{4}\quad }{\frac{7}{8}}=\cfrac{100}{x}\implies \cfrac{5}{4}\cdot \cfrac{8}{7}=\cfrac{100}{x}
\\\\\\
\cfrac{40}{28}=\cfrac{100}{x}\implies x=\cfrac{28\cdot 100}{40}
5 0
3 years ago
What is 19.2×108 minutes in hours?
Gennadij [26K]
The answer is:  [C]:  " 3.200 * 10⁷  h " .
_________________________________________________
Explanation:
________________________________
19.2 * 10⁸  min * (1 hr / 60 min) ;


=  (19.2 * 10⁸)
_______________ ;  
         60

_____________________________
Divide EACH SIDE of the fraction by "10" ; to get:
___________

(19.2 * 10⁷)
_______________ ;  
         6

<span>______________________________

</span>⇒  (19.2) ÷ (6) = 3.2 ;  so rewrite as:
_________________________________________________________

3.2 *  10⁷ ; which corresponds with:

Answer choice:  [C]:  " 3.200 * 10⁷  h " .
_________________________________________________________

6 0
3 years ago
Read 2 more answers
So a computer is priced at the store for $380over a holiday weekend the store is having a 15% discount how much money would you
Rufina [12.5K]

Answer:

the answer is $57

Step-by-step explanation:

380 - 15% = 323. meaning $57 was saved.

8 0
3 years ago
Which of the following equations represents a line that is parallel to the line that passes through the points below?
Pepsi [2]

Answer:

See below

Step-by-step explanation:

Two lines are parallel if they have the same slope but different y-intercepts. So the slope that can be formed given the points (-3,6) and (9,2) is (9-(-3))/(2-6)=12/-4=-3

With y=-3x+b, we need b, which can be found by plugging in either point:

2=-3(9)+b

2=-27+b

29=b

So the y-intercept therefore cannot be 29 but it can be any real number.

So the equation y=-3x+2 works, y=-3x+3, y=-3x+4, and so on....

3 0
3 years ago
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