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2 years ago

8

PLEASE ANSWER QUICKLY. I WILL GIVE THE BRAINLIEST ASAP.

2 answers:

morpeh [17]2 years ago

7 0

Answer:

options (c) is right answer

nata0808 [166]2 years ago

5 0

Answer: B

Step-by-step explanation:

You might be interested in

Suppose you take a 15 question True or False quiz and you guess on every problem. You only get 3 correct. (a) What is the probab

lana66690 [7]

Answer:

0.648

No, that is not an unusually low number of correct guesses.

Step-by-step explanation:

Suppose you take a 15 question True or False quiz and you guess on every problem. You only get 3 correct. Then

$p=\dfrac{3}{15}=\dfrac{1}{5}=0.2$ - correct;
$q=1-p=1-0.2=0.8$ - o\incorrect.

The probability of getting 3 or fewer correct guesses is

$P(\text{3 or fewer})\\=P(0)+P(1)+P(2)+P(3)\\ \\=C^{15}_0p^0q^{15-0}+C^{15}_1p^1q^{15-1}+C^{15}_2p^2q^{15-2}+C^{15}_3p^0q^{15-3}\\ \\=1\cdot q^{15}+15pq^{14}+105p^2q^{13}+455p^3q^{12}\\ \\=(0.8)^{15}+15\cdot 0.2\cdot (0.8)^{14}+105\cdot (0.2)^2\cdot (0.8)^{13}+455\cdot (0.2)^3\cdot (0.8)^{13}\\ \\\approx 0.648$

Using the criteria that a number 3 is unusually low if P(3 or fewer) ≤ 0.05, we can state that 3 is not an unusually low number of correct guesses.

5 0

2 years ago

A-5-B when A=9 and B=-4

Fed [463]

Answer:

8

Step-by-step explanation:

(Refer to picture)

Plug in the value of A and the value of B into the expression

3 0

3 years ago

One lap around a dirt track is 1/3 miles. it takes Bryce 1/9 hour to ride one lap. what is bryce's unit rate ,in miles,around th

lana [24]

Answer:

Bryce's speed (slow speed I might add) is 3 miles per hour.

Explanation:

s /d= t

where

s = speed d= distance t = time.

Solving for gives:

s = 1/3 / 1/9

s= 9/3

s= 3 miles per hour

3 0

2 years ago

Which statements are true?<br>(look at picture)

Makovka662 [10]

Answer:

D is true, E is true, F is true

Step-by-step explanation:

Hello,

n is an odd number it means that n = 2a+1 where a is integer

A

$n^2-1=(2a+1)^2-1=4a^2+4a+1-1=4a(a+1)$

this is <u>not</u> an odd number

B

$n(n-1)=(2a+1)2a$

this is <u>not</u> an odd number

C

$(n-1)^2=(2a+1-1)^2=4a^2$

this is <u>not</u> an odd number

D

$n^2+2=(2a+1)^2+2=4a^2+4a+1+2=4a^2+4a+3= 2(2a^2+2a+1)+1$

so this is an odd number

E

$n(n-2)=(2a+1)(2a-1)=4a^2-1=4a^2-2+1=2(2a^2-1)+1$

so this is an odd number

F

$(n-2)^2=(2a+1-2)^2=(2a-1)^2=4a^2-4a+1 = 2(2a^2-2a)+1$

this is an odd number

hope this helps

7 0

2 years ago

The square of a number is 3 less than four times the number. Which values could be the number? 0 0 -3 O 1

grigory [225]

Answer:

3 and/or 1.

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers