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Ostrovityanka [42]
3 years ago
11

Please help ASAP! 20 Points!

Mathematics
1 answer:
AveGali [126]3 years ago
3 0
The answer is B. That is not a valid way to sample as it is not randomly selected.
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Find the 8th term of the geometric sequence 5, -15, 45
FrozenT [24]

Answer:

a₈ = - 10935

Step-by-step explanation:

the nth term of a geometric sequence is

a_{n} = a₁ (r)^{n-1}

where a₁ is the first term and r the common ratio

here a₁ = 5 and r = \frac{a_{2} }{a_{1} } = \frac{-15}{5} = - 3 , then

a₈ = 5 × (-3)^{7} = 5 × - 2187 = - 10935

6 0
1 year ago
The lengths of two sides of a triangle are 15 inches each.the third side measures 10 inches what type of triangle is this?
Degger [83]
Since only 2 sides are equal (not 3), this is an "isosceles triangle."
6 0
3 years ago
A TV set contains five circuit boards of type A, five of type B, and four of type C. The probability of failing in its first 500
nekit [7.7K]

Answer:

0.903264

Step-by-step explanation:

Given that a TV set contains five circuit boards of type A, five of type B, and four of type C. The probability of failing in its first 5000 hours of use is 0.03 for a type A circuit board, 0.04 for a type B circuit board, and 0.03 for a type C circuit board.

Let A' = the event that A fails, B' =  B fails and C'= C fails.

Probability that no circuit board fails = Prob (A'B'C')

= P(A')P(B')P(C')  (since A,B, C are independent, their complements are independent

= (1-0.03)(1-0.04)(1-0.03)

= 0.903264

8 0
3 years ago
What percent is 36 of 90?<br><br> can u show it by doing a cross multiply method?
algol13

Answer:

40 percent is right answer of 36 of 90

4 0
2 years ago
Read 2 more answers
26. If the area of the rectangle shown below is given by the expression 3x + 7x - 6,
Crazy boy [7]

Answer:

D=(3x-2)

Step-by-step explanation:

Area=length×width =3x²+7x-6

thus a=3 b=7 c=-6

W=(x+3)

since c is -6 it has to be the product of 3(from W)=-2

since a=3 multiply by x (from W) 3×x=3x

=3x-2

check if its correct.

3x-2×x+3

x(3x-2)+3(3x-2)

3x²-2x+9x-6

3x²+7x-6 thus its true

6 0
3 years ago
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