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stellarik [79]
3 years ago
8

The scatter plot and regression line below show the relationship between how early students turned in an exam (measured by minut

es remaining in the exam) and their exam scores
The fitted line has a y-intercept if 87.

What is the best interpretation of this y-intercept?

Mathematics
2 answers:
iogann1982 [59]3 years ago
5 0

Answer:

D The model indicates that students who turned in the exam exactly at the end of the period will have an average score of 87 points.

Step-by-step explanation:

Idk how to help but khan said it was right.

likoan [24]3 years ago
4 0

Step-by-step explanation:

Based off of the fitted line, we obtain expected values, given an input. If the input is 0 minutes remaining (meaning a student turns in a test with no time remaining), the expected value of their exam score is 87.

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Given: Triangle ABC : triangle ADB. AB =24, AD =16 <br> Find: AC
RoseWind [281]

Answer:

<h2>AC = 36.01</h2>

Step-by-step explanation:

Given ΔABC and ΔADB, since both triangles are right angled triangles then the following are true.

From ΔADB, AB² = AD²+BD²

Given AB = 24 and AD = 16

BD² = AB² - AD²

BD² = 24²-16²

BD² = 576-256

BD² = 320

BD = \sqrt{320}

BD = 17.9

from ΔABC, AC² = AB²+BC²

SInce AC = AD+DC and BC² = BD² + DC² (from ΔBDC )we will have;

(AD+DC)² = AB²+ (BD² + DC²)

Given AD = 16, AB = 24 and BD = 17.9, on substituting

(16+DC)² = 24²+17.9²+ DC²

256+32DC+DC² =  24²+17.9²+ DC²

256+32DC = 24²+17.9²

32DC = 24²+17.9² - 256

32DC = 640.41

DC = \frac{640.41}{32}

DC = 20.01

Remember that AC = AD+DC

AC = 16+20.01

AC = 36.01

6 0
3 years ago
Which of the following statements is not true? a) The standard deviation of the sampling distribution of sample mean = σ/√n b) T
I am Lyosha [343]

Answer:

e) The mean of the sampling distribution of sample mean is always the same as that of X, the distribution from which the sample is taken.

Step-by-step explanation:

The central limit theorem states that

"Given a population with a finite mean μ and a finite non-zero variance σ2, the sampling distribution of the mean approaches a normal distribution with a mean of μ and a variance of σ2/N as N, the sample size, increases."

This means that as the sample size increases, the sample mean of the sampling distribution of means approaches the population mean.  This does not state that the sample mean will always be the same as the population mean.

6 0
3 years ago
Which is the parent function of y=√5x+6
Ostrovityanka [42]
Hi there! The answer is D.

The parent function is the simplest form of a function. We can distinguish a variety of parent functions like linear, exponential, square root, absolute, logarithmic, quadratic, cubic, rational or constant (trigonometric functions excluded).

Now we can have a look at the function.
y =  \sqrt{5x  + 6}

The thing that is the most important in this function is the square root, because this mainly decides the way the function looks. Therefore, the parent function is the simplest form of a square root function, which is the following:
y =  \sqrt{x}

Therefore the answer is D.
~ Hope this helps you!
6 0
3 years ago
Evaluate 4z divided 7 for z=35
Alex787 [66]
Plug 35 in for z. Multiply 4 and 35 to get 140 then divide by 7 to get 20
4 0
3 years ago
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Which of the following choices is equivalent to the expression below?
Alex
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8 0
3 years ago
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