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sveticcg [70]
3 years ago
7

Find an equation for the nth term of the arithmetic sequence. -20, -16, -12, -8, .

Mathematics
2 answers:
devlian [24]3 years ago
8 0

Answer:

1) a30=96

2) 30(-20+96)/2

3) 1140

ollegr [7]3 years ago
7 0
We are given with the sequence -20, -16, -12, -8. From this sequence, we can see that the arithmetic difference is +4, from -(-20 + 16). hence following the arithmetic formula of an = a1 + d *(n-1). Substituting, an = -20 + 4 *(n-1) where n is an integer 
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How do find the volume of 20cm and 30cm and 45cm
saw5 [17]
What 3D figure/shape is it?
7 0
3 years ago
Total amount of rain each county received for five days. Palm Beach 2.3., Broward 3.5,and Dade 3.0. On average,how many inches o
eduard

Answer: On average, each country receives 2.93 inches of rain each day.

Step-by-step explanation:

Since we have given that

Palm Beach = 2.3

Broward = 3.5

Dade = 3.0

So,the average inches of rain each country would receive each day would be :

\dfrac{2.3+3.5+3.0}{3}=\dfrac{8.8}{3}=2.93\ inches

Hence, on average, each country receives 2.93 inches of rain each day.

7 0
4 years ago
What is the measure of angle AFR?
Vladimir [108]

Answer:

<h2><u><em>13°</em></u></h2>

Step-by-step explanation:

AFR = VFN (opposite angle rule)

7x + 33 = 9x + 7

33 - 7 = 9x - 7x

26 = 2x

x = 26 : 2

x = 13°

-----------------

check

7 * 13 + 33 = 9 * 13 + 7   (remember PEMDAS)

91 + 33 = 117 + 7

124 = 124

the answer is good

8 0
2 years ago
An urn contains 2 red marbles and 3 blue marbles. 1. One person takes two marbles at random from the urn and does not replace th
Ghella [55]

Answer:

A) The best way to picture this problem is with a probability tree, with two steps.

The first branch, the person can choose red or blue, being 2 out of five (2/5) the chances of picking a red marble and 3 out of 5 of picking a blue one.

The probabilities of the second pick depends on the first pick, because it only can choose of what it is left in the urn.

If the first pick was red marble, the probabilities of picking a red marble are 1 out of 4 (what is left of red marble out of the total marble left int the urn) and 3 out of 4 for the blue marble.

If the first pick was the blue marble, there is 2/4 of chances of picking red and 2/4 of picking blue.

B) So a person can have a red marble and a blue marble in two ways:

1) Picking the red first and the blue last

2) Picking the blue first and the red last

C) P(R&B) = 3/5 = 60%

Step-by-step explanation:

C) P(R&B) = P(RB) + P(BR) = (2/5)*(3/4) + (3/5)*(2/4) = 3/10 + 3/10 = 3/5

3 0
3 years ago
1) Based on the provided chemical and physical properties of the unknown substance. It would be MOST useful as a(n) es A) machin
GenaCL600 [577]

Answer:

The answer would be C

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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