Which multiplication has a negative answer? A) (-1)(-1) B) (-1)(-1)(-1)(-1)
C) (-1)(-1)(-1)(-1)(-1)
D) (-1)(-1)(-1)(0)

Answers

Answer 1

Answer: C is the one that multiplies to a negative number because

A multiples to positive 1
B also multpilies to positive 1 and d multiples to 0

A negative multiplied by a negative is a positive
A netative multiplied by a positive is a negative

Answer 2

Answer:

Answer:

Step-by-step explanation:

Related Questions

Which is the graph of f(x) = x2 – 2x + 3?
49 increased by twice a number m
3 times the sum of the first and the third integer is equal to 30 more than 4 times the second integer
A hungry college student just finished eating a large cheese and pepperoni pizza from Doug's Pizza Palace and felt there wasn't enough cheese and pepperoni on it as he has had large pizzas with more cheese and pepperoni on it from this place in the past. This led him to wonder what the average weight of a large cheese and pepperoni pizza was at Doug's Pizza Palace. Doug ordered a large cheese and pepperoni pizza from Doug's Pizza Palace on 15 randomly selected days during a particular term and weighed each before eating it. Suppose all conditions are met for inference using the one-sample t-methods. The student constructed a 95% confidence interval for the population mean using the one-sample t-methods. How many degrees of freedom does the t critical value have?
What is the approximate area of the shaded sector in the circle shown below? A) 26.5 cm^2 B) 11.78 cm^2 C) 5.89 cm^2 D) 53.0 cm^2

|2n+5|>/9 solve for n?

Answers

$|2n+5|\geq9\iff2n+5\geq9\ or\ 2n+5\leq-9\ \ \ |subtract\ 5\ from\ both\ sides\n\n2n\geq4\ or\ 2n\leq-14\ \ \ \ \ |divide\ both\ sides\ by\ 2\n\n\boxed{n\geq2\ or\ n\leq-7}\n\nAnswer:\boxed{\boxed{n\in(-\infty;-7]\ \cup\ [2;\ \infty)}}$

$|2n+5|\geq9\n2n+5\geq 9 \vee 2n+5\leq-9\n2n\geq4 \vee 2n\leq-14\nn\geq2 \vee n\leq-7\nn\in(-\infty,-7\rangle\cup\langle2,\infty)$

How many solutions are possible for a triangle with B=44,a=23,=12?

Answers

$b/sinB = a/sinA$

$12/sin44 = 23/sinA$

$12sinA = 23*sin44$

$sinA = (23*sin44)/12$

$sinA = 1.3314$

No Solution

What is deductive reasoning in geometry

Answers

Deductive reasoning is a valid form of proof.

deductive reasoning is the process by which a person makes conclusions based on previously known facts.

Use the given data to construct a confidence interval for the population standard deviation, σσ. Assume that the population has a normal distribution: The football coach randomly selected the following players and timed how long each player took to perform a certain drill. The times (in minutes) were:[10,10,15,10,11,7,5,5]

Find a 95.0 confidence interval for the population standard deviation σ

A) 2.6194049<σ<6.43192582.6194049<σ<6.4319258
B) 2.2194049<σ<6.83192582.2194049<σ<6.8319258
C) 2.6194049<σ<7.43192582.6194049<σ<7.4319258
D) None of These

Answers

Answer:

The confidence interval for the population standard deviation would be:

C) 2.6194049<σ<7.4319258

Step-by-step explanation:

1) Data given and notation

s represent the sample standard deviation

$\bar x$ represent the sample mean

n=8 the sample size

Confidence=95% or 0.95

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population mean or variance lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

The Chi Square distribution is the distribution of the sum of squared standard normal deviates.

2) Calculating the confidence interval

The confidence interval for the population variance is given by the following formula:

$((n-1)s^2)/(\chi^2_(\alpha/2)) \leq \sigma \leq ((n-1)s^2)/(\chi^2_(1-\alpha/2))$

On this case we need to find the sample standard deviation with the following formula:

$s=\sqrt{(\sum_(i=1)^8 (x_i -\bar x)^2)/(n-1)}$

And in order to find the sample mean we just need to use this formula:

$\bar x =(\sum_(i=1)^n x_i)/(n)$

The sample mean obtained on this case is $\bar x= 9.125$ and the deviation s=3.357

The next step would be calculate the critical values. First we need to calculate the degrees of freedom given by:

$df=n-1=8-1=7$

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a tabel to find the critical values.