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Sonbull [250]
3 years ago
11

5) 1

Mathematics
1 answer:
solniwko [45]3 years ago
6 0

Answer:

$3.49

Step-by-step explanation:

-The z value is calculated by the formula:

z=\frac{\bar x -\mu}{\sigma}

Where \mu, \sigma are the mean and standard deviation respectively and \bar x is the price of the random selection.

#We substitute and solve for \mu:

z=\frac{\bar x -\mu}{\sigma}\\\\1.6=\frac{4.29-\mu}{0.5}\\\\0.8=4.29-\mu\\\\\mu=3.49

Hence, the mean price of a box of cereal is $3.49

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The student council is planning the school carnival. Each
Assoli18 [71]

Answer: y = 2.50x

Step-by-step explanation:

X represents the number of tickets sold, and because each ticket costs $2.50, the expression would be 2.50x to find how much money is raised, which can be represented as y.

5 0
3 years ago
If x=3 what is 3x+7x(8x 5)<br> ALSO does anyone wanna ch.at?
koban [17]

Answer:  

56x6+3x

Step-by-step explanation:

3x+7x(8x5)

3x+56x6

7 0
3 years ago
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Line segment ______ is part of Line _______. Point _____ is the vertex of angle PQR
Elodia [21]

Answer:

3rd

Step-by-step explanation:

I think thats how u fill it

6 0
2 years ago
Solve for all possible values of x.<br> √60 8x = x - 9
umka2103 [35]

The possible values of x are 3 and 7

<h3>Solving rational expressions</h3>

Given the rational expression below;

√60-8x = x - 9

Square both sides to have:

(60-8x)² = (x-9)²

60-8x = x²-18x+81

Equate to zero to have;

x²-18x+81 - 60 + 8x = 0

x² - 10x + 21 = 0

x² -3x-7x +21 = 0

x(x-3)-7(x-3) = 0

x = 3 and 7

Hence the possible values of x are 3 and 7

Learn more on rational expression here: brainly.com/question/25292194

#SPJ1

4 0
2 years ago
Is the line through points P(0, –9) and Q(2, –8) perpendicular to the line through points R(1, 4) and S(3, 3)? Explain
Serjik [45]
The quickest way to tell if a line is perpendicular is to find the slope, so you'll need to get the slope for both lines

PQ = ((-8) - (-9))/(2 - 0) = 1/2

and, for reference, a perpendicular slope is the negative reciprocal of the original (so we're looking for -2)

RS = (3 - 4)/(3 - 1) = -1/2

so, no, these two lines aren't perpendicular because the slope of RS is only the negative of PQ, not the negative <em>reciprocal</em>.
3 0
3 years ago
Read 2 more answers
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