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3 years ago

12

Wendy is a math tutor. She charges $45 for each tutoring session plus $0.80 per mile that she has to drive to and from the sessi

on. Write an equation to represent this situation.

1 answer:

omeli [17]3 years ago

5 0

Answer:

equation:

0.80x + 45

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Se quieren llenar 100 botellas de agua con una capacidad de 1/4lt ¿cuantos litros de agua son necesarias?

Mrac [35]

Answer:

25

Step-by-step explanation:

Because 100 25+25+25+25 or 25/1/4

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2 years ago

Use cramer's rule to determine if the system is inconsistent system or contains dependent equations. 2x + 7 = 8 6x + 3y = 24 que

Natali [406]

Answer: In the equations that you have given, we have a dependent system.

2x + y = 8 (I assumed that you meant to type y instead of 7)
6x + 3y = 24

To use Cramer's Rule, we have to take the determinant of 3 different matrices written in the problem. Taking the determinant of the coefficient matrix produces a zero.

2 1 This is the coefficient matrix.
6 3

6 - 6 = 0

Since this is 0, the rest of the work will be undefined meaning the systems are dependent (or they are the versions of the same equation).

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3 years ago

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Where do I put the parentheses in 15-3x4+9=12

aivan3 [116]

Answer:

That depends on which operations you want to do first. The order of operations affect to outcome of the equation.

In this case:

15 - (3 x 4) + 9 = 12

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2 years ago

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What is y+2=-4(X-6) in Ax+By=C form

PSYCHO15rus [73]

Y+2=-4x+24
2=-4x-y+24
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3 years ago

Assume that the distribution of weights of adult men in the United States is normal with mean 190 pounds and standard deviation

avanturin [10]

Answer:

182.41

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 190, \sigma = 30$

40th percentile

Value of X when Z has a pvalue of 0.4. So X when Z = -0.253.

$Z = \frac{X - \mu}{\sigma}$

$-0.253 = \frac{X - 190}{30}$

$X - 190 = -0.253*30$

$X = 182.41$

So the answer is 182.41.

5 0

3 years ago