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3 years ago

The math department bought 30 caculators for 255. What wss the cost of each caculator?

Mathematics

2 answers:

SVEN [57.7K]3 years ago

7 0

$255/30 = 8.50

Each calculator costs $8.50

posledela3 years ago

5 0

simply divide 255 by 30

ANSWER: $8.50

<em>I wish calculators were that cheap nowadays!</em>

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Whats the solution to this equation? 3x-9=12

Nutka1998 [239]

Answer:

x=7

Step-by-step explanation:

3x-9=12

add 9 to both sides

3x=21

divide both sides by 3

x=7

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3 years ago

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(9y® + 2)2 =<br> combine like terms

Vsevolod [243]

Answer:

81y^2+36y+4

Step-by-step explanation:

First: 9y^2= 81y

Next: 2^2= 4

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4 years ago

Assume that thermometer readings are normally distributed with a mean of degrees and a standard deviation of 1.00degrees C. A th

Andrew [12]

Answer:

0.2684 is the probability that the temperature reading is between 0.50 and 1.75.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 0 degrees

Standard Deviation, σ = 1 degrees

We are given that the distribution of thermometer readings is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

P(Between 0.50 degrees and 1.75 degrees)

$P(0.50 \leq x \leq 1.75)\\\\ = P(\displaystyle\frac{0.50 - 0}{1} \leq z \leq \displaystyle\frac{1.75-0}{1})\\\\ = P(0.50 \leq z \leq 1.75)\\= P(z \leq 1.75) - P(z < 0.50)\\= 0.9599 - 0.6915 = 0.2684 = 26.84\%$

0.2684 is the probability that the temperature reading is between 0.50 and 1.75.

7 0

4 years ago

Help me solve -2+5n=4n+2

iris [78.8K]

Sorry for the messy handwriting

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3 years ago

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Galina-37 [17]

(a4-6a+5)-(a4-3a+4a-6)
by expressing like term
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7 0

3 years ago