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liubo4ka [24]
3 years ago
8

Someone help please, use a variable equation to represent the situation and solve it using inverse operations.

Mathematics
1 answer:
DanielleElmas [232]3 years ago
5 0

ANSWER:

Let no of rides be x.

So, According to question

2.5x + 5 = 50

2.5(x + 2) = 50

x + 2 = 50/2.5

x + 2 = 20

x = 18 rides.

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Can someone please help?
Shalnov [3]

Answer:

c. 50

Step-by-step explanation:

count each full block and every block that is more than half full as 1 each, ignore every block that is less than half full.

I got exactly 50 using this method before looking at the available answers.

In multiple choice math problems try to ignore the possible answers until you have determined what you think it ought to be.  If the answer you found is in the list you have more confidence you are right, if the answer you got is not in the list you know you did something wrong... just a hint :)

4 0
3 years ago
The director of the library calculates that 29% of the library's collection is checked out. If the director is right, what is th
marusya05 [52]

Answer:

The probability that the proportion of books checked out in a sample of 412 books would differ from the population proportion by less than 4% is P=0.9255.

Step-by-step explanation:

The population's proportion is \pi=0.29

If we take a sample of 412 books (n=412), we have a standard deviation of the sampling distribution of:

\sigma_M=\sqrt{\frac{\pi(1-\pi)}{n}}=\sqrt{\frac{0.29*0.71}{412}}=\sqrt{0.0005} =0.0224

We have to calculate the probabilty that the sample proportion will be between 0.25 and 0.33.

z_1=(0.25-0.29)/0.0224=-0.04/0.0224=-1.7857\\\\z_2=1.7857\\\\\\P(0.25

8 0
3 years ago
What is the distance from point (– 1, 3) to the line 3x – 4y = 10?​
natta225 [31]

Answer:

5 units

Step-by-step explanation:

The distance from a point (m, n ) to the line Ax + By + C = 0 is given by

d = \frac{|Am+Bn+C|}{\sqrt{A^2+B^2} }

For the point (- 1, 3 ) , with m = - 1 and n = 3

3x - 4y = 10 ( subtract 10 from both sides )

3x - 4y - 10 = 0

with A = 3 , B = - 4 , C = - 10

d = \frac{|3(-1)+(-4)3-10|}{\sqrt{3^2+(-4)^2} }

   = \frac{|-3-12-10|}{9+16}

   = \frac{|-25|}{\sqrt{25} }

    = \frac{25}{5}

     = 5

5 0
2 years ago
Please Help!!
meriva
Apperently someone deleted my question i was trying to see if you had understood what i was trying to help you on

6 0
3 years ago
The data set shows the length in inches of seven pieces of wire: 7.9, 6.8, 7.6, 9.9, 10.1, 9.1 and 10.9; What is the mean and me
vfiekz [6]
The median would be: 7.9
and the mean would be:7.4714285714 (you are able to chop that down a bit if needed)
4 0
3 years ago
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