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Studentka2010 [4]
3 years ago
13

Two pencils and a ruler cost 98 cents in total. One pencil and 2 rulers cost $1.24 in total. Find the cost of each item.

Mathematics
2 answers:
yuradex [85]3 years ago
6 0
Answer: 2.16
6(2p)+15p=2.16
12p+15p=2.16
27p=2.16
salantis [7]3 years ago
5 0

Answer:

2.16

Step-by-step explanation:

r = cost of ruler

p = cost of pencil

 

r = 2p

6r + 15p = 2.16

 

Substitute 2p in place of r in 2nd equation and solve for p

 

6(2p) + 15p = 2.16

12p + 15p = 2.16

27p = 2.16

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You won a free ticket to see the latest Star Wars movie this Friday night (which you can costlessly resell for its face value of
Bogdan [553]

Answer:

The opportunity cost of going to see the Star Wars movie on Friday is $35.

Step-by-step explanation:

You won a free ticket to see the latest Star Wars movie this Friday night with a  face value of $15.

Tickets to see your favorite band cost $30, and on any given day, you would be willing to pay as much as $50 for a ticket.

So, the opportunity cost of going to see the Star Wars movie on Friday =

50+15-30=35 dollars

7 0
3 years ago
Convert the following repeating decimal to a fraction in simplest form .31 with the 1 repeating
bekas [8.4K]

Answer:

14/45

Step-by-step explanation:

So we have the fraction:

0.3\bar1=0.31111...

We can do this algebraically. Follow to following steps:

Let's let this number equal to n. Thus:

0.31111...=n

Since there is only 1 digit repeating, let's multiply everything by 10. So:

3.1111...=10n

Now, subtract n from both sides:

3.1111-n=10n-n

On the left, substitute the number for n. On the right, combine like terms:

3.1111...-0.31111...=9n

All of the 1s will cancel. So:

3.1-0.3=9n

Subtract:

2.8=9n

Divide both sides by 9:

n=2.8/9

Remove the decimal by multiplying both sides by 10:

n=28/90

Reduce:

n=14/45

And we're done!

Use a calculator to check:

14/45\stackrel{\checkmark}{=}0.31111...

7 0
3 years ago
Graph the inequality x<1
S_A_V [24]

,,,,,,,,,,,,,m............

7 0
3 years ago
Write the standard form of the line that passes through the given points. Include your work in your final answer. Type your answ
Oksanka [162]
Standard form is ax+by=c

first we use
y-y1=m(x-x1)
a point is (x1,y1)
the slope is m


the slope between the points (x1,y1) and (x2,y2) is
(y2-y1)/(x2-x1)
given
(1,1) and (3,4)
slope=(4-1)/(3-1)=3/2

a oint is (1,1) and slope is 3/2
y-1=3/2(x-1)
y-1=3/2x-3/2
solve for ax+by=c form, a is normally positive and a and b and c are whole numbers
times 2 both sides
2y-2=3x-3
minus 2y
-2=3x-2y-3
add 3
1=3x-2y
3x-2y=2
5 0
3 years ago
What is the value of x
VLD [36.1K]

Answer:

value of x = 8

Step-by-step explanation:

if the given lines are parallel, then the shown pair of angles are corresponding angles,

and we know that the the pair of corresponding angles are equal so,

=》16x - 8 = 120

=》16x = 128

=》x = 128 ÷ 16

=》x = 8

6 0
3 years ago
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