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Burka [1]
3 years ago
7

PLZ HELP ASAP Using the frequency table below, find how many students received a score of 70 or better on a mathematics test.

Mathematics
2 answers:
Sergio039 [100]3 years ago
7 0
Okay this one is pretty easy.

Here are the steps:
1. we know that 70 - 79 = 5 students 80 - 89 = 7 students 90 - 99 = 2 students. 
2. ADD
3. 5 + 7 + 2= 14 
4. ANSWER


A: D there are 14 students scored 70 and above! 
Hope this helped! (tell me if i'm wrong or right please!!!)
 
ivanzaharov [21]3 years ago
3 0

Answer:

D.14

Step-by-step explanation:

To find out the answer, we need to add up all the student s that a 70 or above. 5 got 70-79, 7 got 80-89, and 2 got 90-99.Add these up and we get 14. The answer is D.14

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3 years ago
Read 2 more answers
What is the constant of proportionality between y and x in the graph?
KatRina [158]

Answer:

y=3x

Step-by-step explanation:

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3 0
3 years ago
Historical data for a local manufacturing company show that the average number of defects per product produced is 2. In addition
charle [14.2K]

Answer:

The probability that there will be a total of 7 defects on four units  is 0.14.

Step-by-step explanation:

A Poisson distribution describes the probability distribution of number of success in a specified time interval.

The probability distribution function for a Poisson distribution is:

P(X = x)=\frac{e^{-\lambda}\lambda^{x}}{x!}, x=0,1,2,3,...

Let <em>X</em> = number of defects in a unit produced.

It is provided that there are, on average, 2 defects per unit produced.

Then in 4 units the number of defects is, (2\times4)=8.

Compute the probability of exactly 7 defects in 4 units as follows:

P(X = x)=\frac{e^{-\lambda}\lambda^{x}}{x!}\\P(X=7)=\frac{e^{-8}8^{7}}{7!}\\=\frac{0.0003355\times2097152}{5040}\\ =0.1396\\\approx0.14

Thus, the probability of exactly 7 defects in 4 units is 0.14.

8 0
3 years ago
Solve the equation by completing the square
vovikov84 [41]
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4 0
3 years ago
Plz help me with this 245 x 4 =
const2013 [10]

Answer:

980

Explanation step by step:

The factors are arranged and multiplied

\: 245 \\ \:  \:  \:\times  4 \\  -  -  -  \\9 \: 8 \: 0

6 0
3 years ago
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