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3 years ago

Which statement is true about whether A and B are

Mathematics

1 answer:

antiseptic1488 [7]3 years ago

8 0

Answer: A

A and B are independent emvents because P(AIB) = P(A).

Correct on Edge

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1 3/5 times 2 1/2 how much does it equal

pav-90 [236]

Answer:

If the problem is asking $1\frac{3}{5} * 2\frac{1}{2}$ then the answer is 4

If it's asking $\frac{13}{5}*\frac{21}{2}$ then the answer is $\frac{273}{10}$

Step-by-step explanation:

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3 years ago

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Math!! please helpp!!!

VladimirAG [237]

Answer:

Step-by-step explanation:

The exact point should be (0, 4) if you're looking for the Y intercept. I'm assuming that each square represents one unit. Hope I could help.

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2 years ago

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In a G.P the 3rd term is 4 times the 1st term and the sum of the 2nd term and the 4th term is 30.find the common ratio,find the

STALIN [3.7K]

Answer:

the common ratio is either 2 or -2.

the sum of the first 7 terms is then either 765 or 255

Step-by-step explanation:

a geometric sequence or series of progression (these are the most common names for the same thing) means that every new term of the sequence is created by multiplying the previous term by a constant factor which is called the common ratio.

so,

a2 = a1×f

a3 = a2×f = a1×f²

a4 = a3×f = a1×f³

the problem description here tells us

a3 = 4×a1

and from above we know a3 = a1×f².

so, f² = 4

and therefore the common ratio = f = 2 or -2 (we need to keep that in mind).

again, the problem description tells us

a2 + a4 = 30

a1×f + a1×f³ = 30

for f = 2

a1×2 + a1×2³ = 30

2a1 + 8a1 = 30

10a1 = 30

a1 = 3

for f = -2

a1×-2 + a1×(-2)³ = 30

-10a1 = 30

a1 = -3

the sum of the first n terms of a geometric sequence is

sn = a1×(1 - f^(n+1))/(1-f) for f <>1

so, for f = 2

s7 = 3×(1 - 2⁸)/(1-2) = 3×-255/-1 = 3×255 = 765

for f = -2

s7 = -3×(1 - (-2)⁸)/(1 - -2) = -3×(1-256)/3 = -3×-255/3 =

= -1×-255 = 255

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2 years ago

What is the domain of the function y= 4x+6 - 7?

Fantom [35]

<h2>Answer:</h2>

<em>Domain:</em> (−∞,∞) , {x|x∈R}

<h2> explanation:</h2>

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

<u><em>Interval Notation:</em></u>

(−∞,∞)

<u><em>Set-Builder Notation:</em></u>

{x|x∈R}

i hope this helped. please give brainliest if it did!

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3 years ago

Sam has twice as many books as Jim. If Sam gives 12 books to Jim, they will have the same number of books. How many books do the

Neko [114]

Alright, lets get started.

Suppose number of books Jim have = x

Sam has twice as many books as Jim. So,