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ArbitrLikvidat [17]
1 year ago
9

Write a system of equations to describe the situation below, solve using any method, and fill in the blanks. Reid wants to make

scrapbooks with old family photos. An online scrapbooking company charges $46 for a basic book and $1 per page. Meanwhile, a family friend is willing to make a scrapbook for $34 plus $3 per page. For a certain number of pages, the price would be equal. How many pages would that be? How much would that cost? If the scrapbook had blank pages, it would cost $blank
Mathematics
1 answer:
Elina [12.6K]1 year ago
4 0

Let p be the number of pages printed.

The expression for the price charged by the online scrapbooking company is:

46+p

And the expression for the price charged by the family friend is:

34+3p

SInce both prices will be the same for a certain value of p, we'll get that

46+p=34+3p

Solving for p :

\begin{gathered} 46+p=34+3p \\ \rightarrow46-34=3p-p \\ \rightarrow12=2p \\ \rightarrow6=p \end{gathered}

This way, we can conclude that both prices will be the same for 6 pages.

This price would be:

\begin{gathered} 46+p\rightarrow46+6\rightarrow52 \\ 34+3p\rightarrow34+3(6)\rightarrow52 \end{gathered}

$52

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The equation of the parabola would be: y= \frac{1}{12} x^2+2
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casey is six time as old as Ralph, In two years, she will be four time as old as Ralph. How old is each of them now?
Keith_Richards [23]

Casey is 18 years old and Ralph is 3 years old.

Step-by-step explanation:

Let,

Age of Casey = x

Age of Ralph = y

According to given statement;

x = 6y     Eqn 1

In two years

x+2=4(y+2)

x+2=4y+8

x = 4y+8-2

x = 4y+6     Eqn 2

Putting value of x from Eqn 1 in Eqn 2

6y=4y+6 \\6y-4y=6\\2y=6

Dividing both sides by 2

\frac{2y}{2}=\frac{6}{2}\\y=3

Putting y=3 in Eqn 1

x=6(3)\\x=18

Casey is 18 years old and Ralph is 3 years old.

Keywords: word problems, substitution method

Learn more about substitution method at:

  • brainly.com/question/12973601
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#LearnwithBrainly

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Writethe greatest whole number that uses all the dighits from 1 to 9
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The greatest whole humber like that is 987654321
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Read 2 more answers
An arithmetic sequence has this recursive formula:
maria [59]

Answer:

C

Step-by-step explanation:

C is the answer because a1=7 , d=-4 and so it's

an=an+(n-1)d

3 0
2 years ago
The length of human pregnancies from conception to birth varies according to an approximately normal distribution with a mean of
Varvara68 [4.7K]

Answer:

A) 68.33%

B) (234, 298)

Step-by-step explanation:

We have that the mean is 266 days (m) and the standard deviation is 16 days (sd), so we are asked:

A. P (250 x < 282)

P ((x1 - m) / sd < x < (x2 - m) / sd)

P ((250 - 266) / 16 < x < (282 - 266) / 16)

P (- 1 < z < 1)

P (z < 1) - P (-1 < z)

If we look in the normal distribution table we have to:

P (-1 < z) = 0.1587

P (z < 1) = 0.8413

replacing

0.8413 - 0.1587 = 0.6833

The percentage of pregnancies last between 250 and 282 days is 68.33%

B. We apply the experimental formula of 68-95-99.7

For middle 95% it is:

(m - 2 * sd, m + 2 * sd)

Thus,

m - 2 * sd <x <m + 2 * sd

we replace

266 - 2 * 16 <x <266 + 2 * 16

234 <x <298

That is, the interval would be (234, 298)

6 0
3 years ago
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