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2 years ago

Either 8 or 10 please

Mathematics

1 answer:

iren2701 [21]2 years ago

6 0

For 8
.11N + 0.5
Hope this helps

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Is (1,3) a solution of the graphed inequality?

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yes.

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What number is 25% of 68

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3 years ago

Read 2 more answers

Suppose IQ scores were obtained for 20 randomly selected sets of couples. The 20 pairs of measurements yield x overbarequals100.

LenaWriter [7]

Answer:

$\hat y = -3.34+ 1.07(91) = 94.03$

Step-by-step explanation:

Data given

n=20 represent the sampel size

$\bar X = 100.39$ represent the sample mean for the independent variable (IQ score of the husband)

$\bar y = 103.6$ represent the sample mean for the dependent variable.

r =0.925 represent the correlation coefficient

Solution to the problem

The general expression for a linear model is given by:

$y = \beta_0 + \beta_1 x$

Where $\beta_0$ is the intercept and $\beta_1$ the slope

For this case we have a linear model given by the following expression:

$\hat y = -3.34 +1.07 x$

Where -3.34 is the intercept and 1.07 the slope. In order to find the best predicted value when X = 91 we just need to replace into the equation the value of 91 and we got this:

$\hat y = -3.34+ 1.07(91) = 94.03$

On this case is the best predicted value because $E(\hat y) = y$ we have an unbiased estimator.

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2 years ago

What is the probability each player has a winning?

olganol [36]

You have a 1 in 50 chance (ie A)
Explanation:
Let's start with the first bag. In it sits 5 numbers. So, you have a 1 in 5 chance that the number picked will be yours.

Now, let's consider the second bag. You have 10 different numbers and only one of yours may be picked. Hence, you have a 1 in 10 chance that yours will get picked.

Since we want them simultaneously, we will need to multiply the two probabilities together, yielding a 1 in 50 chance.

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2 years ago

The manufacturer of a CD player has found that the revenue R (in dollars) is R(p)= -4p2+1200p, when the unit price is p dollars.

qaws [65]

Answer: 9000$

Step-by-step explanation:

Let 's use the formula to find the vertex of the parabola:

ax²+bx+c=0

$\displaystyle x_v=-\frac{b}{2a} \\\\ Where :\\\\ y_v- maximum \ \ income \\\\ y_v=a(x_v)^2+bx_v+c \\\\ Then \ in \ \ our \ \ case : \\\\ -4p^2+1200p =0 \\\\ x_v=-\frac{1200}{-4\cdot 2} =150 \\\\ y_v=-4\cdot (150)^2+150\cdot 1200 \\\\ y_v=150\cdot 1200-150\cdot 600 \\\\ y_v=600\cdot 150=\bf 9000 \$

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2 years ago