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m_a_m_a [10]
3 years ago
11

Write the explicit formula for the geometric sequence. a1 = -5 a2 = 20 a3 = -80

Mathematics
1 answer:
liq [111]3 years ago
6 0
An = a1 * r^(n-1)
a1 = first term = -5
r = common ratio = -4

so ur formula is : an = -5 * -4^(n-1) <==
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2 years ago
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6 0
3 years ago
Please Help ill make brainliest 15 points<br><br> A:149<br> B:153<br> C:225<br> D:297
pogonyaev

Answer: 225 square feet

Step-by-step explanation:

We find the area of the 4 triangle and the area of the rectangle and thereafter we add everything together.

Area of triangle 1 = 1/2 base × height

= 1/2 × 12 × 8

=96/2

=48

Area of triangle 2 = area of triangle 1= 48( because the opposite triangle are congruent so they have equal base and height)

Area of triangle 3 = 1/2×base×height

= 1/2 × 6 ×9.5

= 57/2

=28.5

Area of triangle 4=Area of triangle 3 = 57 (the opposite triangle are congruent and so they have the same base and height hence the same area)

Area of the rectangle = length×breadth

=12 × 6 =72

Total surface area = addition of all the areas of the triangles and the rectangle

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Therefore, the total surface area is 225 square feet

6 0
3 years ago
Will give brainliest please help ASAP
marissa [1.9K]

Answer: 1) If we talk about whole numbers then we should choose only square numbers that could be the area of square so that if we want to find its  side so we a can find its square root i.e. side.

2) We can find the square root of the area of the given square to find the side length of the square.

3) No , it is not possible to find a side length that would be perfect for a square with an area of 45 square units because if we find its side we need to find its square root i.e.

side=\sqrt{45}=\sqrt{3\times3\times5}=3 \sqrt{5}................>which is irrational and √5=2.236

∴side=3×2.236=6.708 unit ......> which is not accurate we need to take approx value of it to get the side length of the square.



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3 years ago
Which type of display would be the most appropriate to compare the sales of 2 different stores for a ten year period?
satela [25.4K]
A line graph? I don't understand the question as much but a line graph would do if thats what ur looking for
Hope this is somehow helpful!
8 0
3 years ago
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