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2 years ago

PLEASE HELP BEEN STUCK FOR HOURS WILL MARK THE BRAINLIEST HAVE TO ANSWER A,B, and C

Mathematics

2 answers:

zaharov [31]2 years ago

8 0

Answer:

A. 1)5.5 2)4.5 3)5.75 4)6.25 B. 1.75 C. A correct B incorrect C incorrect D correct

Step-by-step explanation:

Mean is a fancy way of saying Average , when calculating average you add all the numbers and divide by how many numbers there are:

A

1.

8+6+3+5=22/4=5.5

2.

5+7+4+2=18/4=4.5

3.

8+7+5+3=23/4=5.75

4.

6+8+4+5=25/4=6.25

B

largest mean is 6.25, smallest mean is 4.5:

Subtract lowest mean from highest mean:

6.25-4.5=1.75

C

A)

this is correct because averaging your average gives an overall average,

B)

if a is correct b has to be incorrect

C)

if D is correct C must be incorrect

D)

The closer they are together, that means more likely to be accurate because they are almost the same

I hope this helps u!

pls pls PLS give a brainliest and a thx ;)

OleMash [197]2 years ago

7 0

Sample 1 mean is 5.5

sample 2 mean is 4.5

sample 3 mean is 5.75

sample 4 mean is 5.75

range of means is 5.75-4.5 , just the distance between the highest and lowest sample means so it is 1.25

for question c, options 1 and d are correct

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Write the explicit formula that represents the geometric sequence -2, 8, -32, 128

MissTica

So hmm the first term is -2

and if we divide one term by the term before it, we'd get the "common ratio" "r"

so hmm say -32/8 that gives us -4, so r = -4

thus $\bf n^{th}\textit{ term of a geometric sequence}\\\\
a_n=a_1r^{n-1}\qquad 
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a_1=\textit{first term}\\
r=\textit{common ratio}\\
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a_1=-2\\
r=-4
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3 years ago

The speed limit on a highway is 60 mph write and graph an inequality that describes the situation

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3 years ago

Read 2 more answers

I NEED HELP PLEASE ASAP!!

hammer [34]

Answer:

Option B, 1

Step-by-step explanation:

tan 45° = 1/1 = 1

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3 years ago

According to the Rational Root Theorem, which number is a potential root of f(x) = 9x8 + 9x6 – 12x + 7?

bogdanovich [222]

Answer:

Seven-thirds

Step-by-step explanation:

The give equation is $f(x)=9x^8+9x^6-12x+7$ .

The leading coefficient is 9

The constant term is 7

According to the rational root theorem, the ratio of factors the constant terms to that of the coefficient of the leading term are all possible rational roots of the given polynomial.

Base on this theorem, $\frac{7}{3}$ or seven thirds is a potential root because the numeration is a factor of 7 and the denominator is a factor of 9.

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3 years ago

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Determine if the following statement is true or false. (Enter TRUE if the statement is true, enter a counterexample if the state

ehidna [41]

Answer:

The answer is: the satement is FALSE.

Step-by-step explanation:

The first step is to transform the propositons in the statement into symbols:

A: m is any positive integer

B: n is any positive integer

C: mn is a a perfect square

D: m is a perfect square

E: n is a perfect square

After that we replace the symbols into the statement:

If A and B and C, then D and E

Logical connectives on the satement are:

p⇒q conditional (if ...,then...). For this connective the only case when is FALSE is when the antecedent is true and the consequent is false.
p ∧ q conjunction (p and q). For this connective the only case when is TRUE is when the two propositions are true at the same time.

So now, we are going to replace the logical connectives on the statement:

((A ∧ B) ∧ C) ⇒ (D ∧ E)

There is a hierarchy in logical connectives, first we evaluate those inside brackets. The principal connective is evaluated at the end. In this particular case, the principal connective is the conditional.

As we have five different propositions, the combinations are given by the following rule:

2^n= 2^5=32

32 different combinations

In figure 1, added bellow, it shows the construction of truth table.

In figure 2, added bellow, it shows the development of the truth table. In the development, we don't have as a result a tautology, therefore the statement is FALSE.

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3 years ago