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Drupady [299]
3 years ago
14

Find an explicit rule for the nth term of the sequence. -3, -15, -75, -375, ...

Mathematics
2 answers:
Helga [31]3 years ago
6 0

The answer is B, I have just confirmed it.

koban [17]3 years ago
4 0
It's a geometric progression where
a=-3\\
r=5

a_n=ar^{n-1}\\
a_n=-3\cdot5^{n-1}

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the perimeter of a rectangle is 55 inches. the ratio of the length to width is 7:4. use proportions to find the area of the rect
Leni [432]

Answer:

Step-by-step explanation:

let : x the length and y the width    .... ( x  > y and x ; y reals numbers )

the perimeter is : 2(x+y)

2(x+y) = 55...(1)

x/y = 7/4 ...(2)

by (2) : x = (7/4)y

subsct in (1) : 2( (7/4)y +y ) =55

(7/2)y +2y =55

multiply by 2

7y +4y = 110

11y = 110

y = 10

x = (7/4)(10)

x = 35/2

4 0
3 years ago
How would 2.25 be represented as a percent? A. 225% B. 22.5% C. 2.25% D. 0.0225
ivolga24 [154]

Answer:

A

Step-by-step explanation:

move decimal two places to get percent

2.25 = 225%

6 0
3 years ago
What is the area of the triangle? On a coordinate plane, a triangle has a base of 8 units and a height of 6 units. 24 square uni
LekaFEV [45]

Answer:

24

Step-by-step explanation:

8*6=48/2=24

6 0
3 years ago
Read 2 more answers
An unfair coin with​ Pr[H] = 0.75 is flipped. If the flip results in a​ head, a student is selected at random from a class of si
Agata [3.3K]

Answer:

72.73% probability of selecting a​ girl, given the flip resulted in​heads

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

Coin resulted in heads

Student is selected at random from a class of six boys and sixteen girls.​

Desired outcomes:

16 girls, so D = 16

Total outcomes:

16+6 = 22, that is, 22 students, so T = 22

Probability:

P = \frac{16}{22} = 0.7273

72.73% probability of selecting a​ girl, given the flip resulted in​heads

7 0
3 years ago
Find the circumference of a circle with a radius of 5 cm. Round your
Verizon [17]
31.4
Hope that helps you!
7 0
3 years ago
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