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ivanzaharov [21]
3 years ago
15

Nerissa paid a total of $8 for 4 packs of pencils she purchased from the convenience store. Let p represent the cost of one pack

of pencils.
Which equation shows an equality between two different ways of expressing the cost for all the pencils?
WILL MARK BRAINLIEST
Mathematics
1 answer:
BARSIC [14]3 years ago
3 0

Answer: 4*p=8

Step-by-step explanation:

<em>You can use inverse operation to answer this equation.</em>

  • <em>write out you problem: 4 x p =8</em>
  • <em>The inverse of multiplication is division</em>
  • <em>you do 4/4 which gives you one but the 4 will cancel itself out</em>
  • <em>Do 8/4 which gives you 2</em>
  • <em>under the equation write p = 2</em>
  • <em>And be sure to line the p up with the p, the equal sign with the equal sign, and  the 2  stays where it is ( which should be already lined up with the 8)</em>
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Answer: 12

Step-by-step explanation:

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2 years ago
Professor Halen has 184 students in his college mathematics lecture class. The scores on the midterm exam are normally distribut
AURORKA [14]

Answer: 21

Step-by-step explanation:

Given : The scores on the midterm exam are normally distributed with

\mu=72.3\\\\\sigma=8.9

Let X be random variable that represents the score of the students.

z-score: z=\dfrac{x-\mu}{\sigma}

For x=82

z=\dfrac{82-72.3}{8.9}\approx1.09

For x=90

z=\dfrac{90-72.3}{8.9}\approx1.99

Now, the probability of the students in the class receive a score between 82 and 90 ( by using standard normal distribution table ) :-

P(82

Now ,the number of students expected to receive a score between 82 and 90 are :-

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Hence, 21 students are expected to receive a score between 82 and 90 .

5 0
3 years ago
3x + 3<br> X + 8<br> What is the perimeter of each polygon?
Ganezh [65]

Answer:

D. 60

Step-by-step explanation:

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12x + 12 = 5x + 40        48 + 12               20 + 40

-5x          -5x                   60                        60

7x + 12 = 40

 -12        -12

7x = 28

x = 4

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3 years ago
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amid [387]
78 . Hope this was helpful
4 0
2 years ago
Can someone help me pls!!!
Cerrena [4.2K]

Answer:

First one: Function

Second one: not a function (a function cannot have two outputs)

Third one: Function

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Step-by-step explanation:

Hope it helps!

6 0
2 years ago
Read 2 more answers
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