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Harrizon [31]
3 years ago
9

PLEASE HELP..MATH 8TH GRADE​

Mathematics
2 answers:
jolli1 [7]3 years ago
8 0

Answer. z = ± √10 = ± 3.1623

Dmitriy789 [7]3 years ago
4 0
Z = -16 the steps are in the photo

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Help I don't understand​
Ksivusya [100]

Answer:

Sequence: Reflection over the y-axis, then 1 to the right and 2 down to get the triangle ABC to A'B'C.

Step-by-step explanation:

Have a nice day!

7 0
2 years ago
Help math word problem
erastova [34]

Lets x = # pounds of coffe

70 - 8.06x = 37.76

- 8.06x = - 32.24

         x = 4

Answer

4 lbs

4 0
3 years ago
Fred spent half his allowance on going to the movies he then washed the family car for six dollars he now has eleven dollars how
kotykmax [81]

Answer:

He gets $10 for his weekly allowance.

Step-by-step explanation:

Let x represent the amount that Fred gets for his allowance weekly.

Fred spent half his allowance on the movies. This means that the total amount that he spent on the movies is x/2. The amount that he is left with would be

x - x/2 = x/2

He washed the family car for six dollars. This means that the total amount that he is left with would be

x/2 + 6

if he now has eleven dollars, it means that

x/2 + 6 = 11

x/2 = 11 - 6 = 5

x = 2 × 5 = $10

4 0
2 years ago
Assume the random variable X is normally distributed with mean mu equals 50 and standard deviation sigma equals 7. Compute the p
drek231 [11]

Answer:

The probability that <em>X</em> is less than 42 is 0.1271.

Step-by-step explanation:

The random variable <em>X </em>follows a Normal distribution.

The mean and standard deviation are:

E (X) = <em>μ</em> = 50.

SD (X) = <em>σ</em> = 7.

A normal distribution is continuous probability distribution.

The Normal probability distribution with mean µ and standard deviation σ is given by,

f_{X}(\mu, \sigma)=\frac{1}{\sigma\sqrt{2\pi}}e^{-(x-\mu)^{2}/2\sigma^{2}};\ -\infty

To compute the probability of a Normal random variable we first standardize the raw score.

The raw scores are standardized using the formula:

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

These standardized scores are known as <em>z</em>-scores and they follow normal distribution with mean 0 and standard deviation 1.

Compute the probability of (X < 42) as follows:

P(X

*Use a <em>z</em>-table for the probability.

Thus, the probability that <em>X</em> is less than 42 is 0.1271.

The normal curve is shown below.

6 0
3 years ago
At a store, Michael and Tonya bought bananas.
Anton [14]
C

Let x be the cost of banana

Michael: 4x=2.72
Divide by 4 : x =.68

Tonya: 6x= 4.08
x = .68 divide by 6
5 0
2 years ago
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