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Kipish [7]
3 years ago
5

3. For the following geometric sequence, determine a1 and r and find an explicit formula for the sequence: 2, -6, 18, -54…

Mathematics
1 answer:
Vilka [71]3 years ago
4 0

Step-by-step explanation:

a1 is the first term.  In this case, 2.

r is the common ratio.  Each term is multiplied by -3 to get the next term, so r = -3.

an = 2 (-3)ⁿ⁻¹

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What is the value of 6x+7y−56x+7y−5 when x = 2 and y = 3?
Bingel [31]
You need to Solve 62+73-562+73-5 which should get you -359
4 0
3 years ago
What is the sum of 1.57 and 6.88?
CaHeK987 [17]

Answer:

The answer would be B: 8 ones, 4 tenths, and 5 hundredths.

Explanation:

First, you would have to use the equation: 1.57 + 6.88 = ?

Do the math, and 1.57 + 6.88 = 8.45

Now look at the answer choices. You can automatically get rid of every answer choice but B because none of them have an 8 in the ones place.

5 0
2 years ago
Read 2 more answers
An electrician can wire on average 4.5 houses in a week. How many months will it take her to wire 55 houses if she wires the sam
Brrunno [24]
Just do 4.5 x4.5 and get 20.25 then divide that by 55 and get the answer of 2.7 months. Hope this helps
7 0
3 years ago
josie cast a shadow of 6ft and she is 5 ft 6 in tall. A building cast a shadow of 18 ft at the same time that josie measured her
Debora [2.8K]
Josie's height = 5 ft 6 in. = 5 1/2 ft = 11/2 ft.
Josie's shadow = 6 ft.

Ratio of shadow to height = 6 / 11/2 = 12/11
So, It would be equal to ratio of building's shadow to building's height.

18/x = 12/11
x = 18*11 /12
x = 3*11 / 2
x = 16.5

In short, Your Answer would be 16.5 Feet

Hope this helps!

6 0
3 years ago
If someone can answer this and explain it, I would really appreciate it, thanks.
daser333 [38]

Answer:

x = 13

Step-by-step explanation:

Now since the lines are parrarel, the intersection points are alternate to each other. Therefore, A = B.

Solve:

8x + 2 = 14x - 76

2 + 76 = 6x

78 = 6x

x = 13

8 0
3 years ago
Read 2 more answers
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