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baherus [9]
3 years ago
15

What is the explicit formula of -1,-3,-9,-27

Mathematics
1 answer:
TEA [102]3 years ago
3 0

Answer:

(-1)* (3)^(n-1)

Step-by-step explanation:

common ratio is 3 and the first term is -1

the explicit formula is a * r^ ( n-1)

i.e., (-1) * 3^(n-1)

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Sooo...I just came across this question and I genuinely have no idea what to do. Please help. Thanks! Answer ASAP
Andreyy89
Use the protractor. Put the purple dot on the vertice and the make sure the line is lined up with the bottom and your answer should be lined up.
7 0
2 years ago
Tom's toy box is shown below. The toy box is shaped like a rectangular prism. It has 5 wooden faces and is open on the top. What
mihalych1998 [28]

Answer:

1100 square inches

Step-by-step explanation:

The faces are all rectangles (area = length x width)

Area of bottom:  20 x 10 = 200

Area of front: 20 x 15 = 300

Area of back (same as front) = 300

Area of right side: 10 x 15 = 150

Area of left side (same as right side) = 150

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8 0
2 years ago
What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?
EastWind [94]

Answer:

= 440 ft

Step-by-step explanation:

The perimeter of a rectangle is found by adding up all the sides.  We use the formula

P =2(l+w)

where l is the length and w is the width

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P = 2(140+80)

   = 2(220)

   = 440 ft

5 0
2 years ago
A bag contains 10 marbles. 5 of them are red marbles, 2 blue marbles, and 3 green marbles. You randomly pick a marble out of the
Akimi4 [234]

The probability of randomly picking out a red marble is 50%, or 1/2.

You can figure this out by finding out the percentage of each marble in the bag, and that percentage would be the probability for picking out that colour of marble. For example, the percentage of red marbles in the bag is 50%, the percentage of blue marbles in the bag is 20%, and the percentage of green marbles in the bag is 30%.

By doing this, you figured out not only the percentage of each colour of marble in the bag, but you also figured out the probability of each marble being randomly picked out of the bag.

3 0
2 years ago
Find the value of a.<br> 19 in<br> a<br> 99 in<br> Perimeter<br> 238 inches
Sonja [21]

Answer:

the answer is 60 inches

Step-by-step explanation:

you have to subtract the perimeter and the numbers that are shown after you add them

238-118= 120 then you have to divide that in half wich =60.

so (A)= to 60 inches.

6 0
3 years ago
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