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kobusy [5.1K]
3 years ago
15

Lisa’s test grades are 79, 89, and 90. What is Lisa’s test average?

Mathematics
2 answers:
Ludmilka [50]3 years ago
8 0
So you do 79+89+90=258 then you take 258/3=9.3 so you would get a 93% test average
Hope this helps
Brums [2.3K]3 years ago
5 0

Answer:

Lisa's text average is 86 :))

Step-by-step explanation:

add all numbers up then divide them by 3.

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Mkey [24]

Answer:

12W=24+12

w=36÷12=3

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5 0
4 years ago
Read 2 more answers
Which math function describes the following situation?
MissTica
This is the concept of inequality;
We are told that the distance a car travels depends on how full gas tank is, this means that the car will travel until the point when gasoline is finished. Thus,
This mean that if the if the distance is given by the function f(x), x will be the gasoline since it is the dependent variable, liters this in other words can be written as (if the tank holds 89 ):

f(x)=distance(gasoline)<89

thus the correct answer will be:

B] Distance (amount of gasoline) <  89

4 0
3 years ago
a stock broker has kept a daily record of the value of a particular stock over the years and finds that the prices of the stock
Rainbow [258]

Answer:

The stock price beyond which 0.05 of the distribution fall is $12.44.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be 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.

Mean of $8.52 with a standard deviation of $2.38

This means that \mu = 8.52, \sigma = 2.38

The stock price beyond which 0.05 of the distribution fall is

This is the 100 - 5 = 95th percentile, which is X when Z has a pvalue of 0.95. So X when Z = 1.645.

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

1.645 = \frac{X - 8.52}{2.38}

X - 8.52 = 1.645*2.38

X = 12.44

The stock price beyond which 0.05 of the distribution fall is $12.44.

5 0
3 years ago
Which of the following is a step in simplifying the expression x multiplied by y to the power of 3 over x to the power of negati
Archy [21]

Answer:

Once the rules of exponents are understood, you can begin solving more complicated expressions more easily. Recall that when you take a power to a power, you multiply the exponents, (xa)b= xa·b.


 


What happens when you raise an entire expression inside parentheses to a power? You can use the techniques you already know to simplify this expression.


 


            (2a)4  =  (2a)(2a)(2a)(2a)  =  (2 • 2 • 2 • 2)(a • a • a • a) = (24)(a4) = 16a4


 


Notice that the exponent is applied to each factor of 2a. So, we can eliminate the middle steps.


 


(2a)4  =  (24)(a4), applying the 4 to each factor, 2 and a.


= 16a4


 


The product of two or more numbers raised to a power is equal to the product of each number raised to the same power.



7 0
4 years ago
What is equivalent to number 17.050
Ira Lisetskai [31]
340/20 or 17 1/20 or 1705/100
8 0
4 years ago
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