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Schach [20]
3 years ago
15

Solve equation please!! :) 10 points

Mathematics
2 answers:
Reil [10]3 years ago
7 0

3(x-3)-15 = 0

3x-9-15 = 0

3x - 24 = 0

3x = 24

x = 34/3

x = 8


dimulka [17.4K]3 years ago
3 0
3(x-3)-15 = 0
3(x-3) = 15
3x-9 = 15
3x = 24
x = 8
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The mean amount spent by a family of four on food per month is $500 with a standard deviation of $75. Assuming that the food cos
JulijaS [17]

Answer:

The probability that a family spends less than $410 per month

P( X < 410) = 0.1151

Step-by-step explanation:

<u><em>Step(i):-</em></u>

<em>Given mean of the population = 500 </em>

<em>Given standard deviation of the Population = 75</em>

Let 'X' be the variable in normal distribution

      Z = \frac{x-mean}{S.D}

<em>Given X = $410</em>

<em></em>Z = \frac{410-500}{75} = - 1.2<em></em>

<u><em>Step(ii):-</em></u>

The probability that a family spends less than $410 per month

P( X < 410) = P( Z < - 1.2 )

                  =  0.5 - A( -1.2)

                 = 0.5 - A(1.2)

                = 0.5 - 0.3849  ( ∵from normal table)

                = 0.1151

<u>Final answer:-</u>

The probability that a family spends less than $410 per month

P( X < 410) = 0.1151

6 0
3 years ago
In how many different ways can a red, blue, and green marker be arranged in a tray?
grigory [225]

Answer:

6 ways.

There are one red, one blue and one green maker. So there are 3 markers they are in 3! = 3×2 = 6 ways.

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7 0
3 years ago
Rebecca baked 48 pizzas to share with her friends. She ate 3 pizzas and gave 5 to each of her friends. Which pair of equations,
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48=5x-3

45=5x
x=9 friends

equation: 48=5x-3



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The value of x from the equation is 12. Hence, the angles are,
       
              x = 12
            14(12) = 168

Answer: 12° and 168°
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A test subject is randomly selected for a pregnancy test. What is the probability of getting a subject who is not pregnant, give
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First we need to choose from "Posivite Test" column:
\frac{12}{12+78} =  \frac{12}{90} = 0,1333(3) 
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3 years ago
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