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3 years ago

Find the 2nd and 3rd term of the sequence 1, _, _, –11, –15, ...

Mathematics

2 answers:

elena-14-01-66 [18.8K]3 years ago

7 0

Answer:

-3, -7

Step-by-step explanation:

It's an arithmetic sequence subtracting four each time

-3, -7

Elena L [17]3 years ago

5 0

Answer:

Step-by-step explanation:

-4 and - 7 are the second and third term

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If the if a cylinder is 7 in tall and has a volume of 63 Pi inches what is the area of the cross section it goes right down the

vitfil [10]

Answer: $9\pi \ in.^2$

Step-by-step explanation:

Given

The height of the cylinder is $h=7\ in.$

The volume of the cylinder is $V=63\pi \ in.^3$

The volume of the cylinder is the product of area and height

$\Rightarrow V=\pi r^2h\\$

Insert the values

$\Rightarrow 63\pi =A\times 7\\\\\Rightarrow A=\dfrac{63\pi}{7}\\\\\Rightarrow A=9\pi\ in.^2$

Thus, the area of the cross-section is $9\pi \ in.^2$

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2 years ago

The sum of the first five terms of an arithmetic series is 25, and the first term is 2. Find the constant difference.

aivan3 [116]

Step-by-step explanation:

if you calculate both of you should ask her

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3 years ago

Is the line through points P(2,-9) and Q(6, -13) perpendicular to the line through points R(5,-1) and

Kay [80]

Line through P(0, 5) and Q(-1, 8):
slope = m = (y2 - y1) / (x2 - x1) = (8 - 5) / (-1 - 0) = 3 / -1 = -3

line through R(3, 3) and S(5, -1):
slope = m = (y2 - y1) / (x2 - x1) = (-1 - 3) / (5 - 3) = -4 / 2 = -2

Parallel lines have equal slopes. Since the two lines have different slopes, they are not parallel.

8 0

3 years ago

Find the coordinates of the midpoint of a segment with the given endpoints. *

serg [7]

Step-by-step explanation:

Given points are (-2,5) and (3,-17)

to find midpoint, use this formula

( x1+x2/2 , y1+y2/2)

where points are a(x1,y1) and b(x2,y2)

coming to the question,

midpoint is :

[ (-2-3)/2 , (5-17)/2 ]

[ -5/2 , -12/2 ]

[ -2.5 , -6 ]

OPTION $A$ IS CORRECT

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3 years ago

Read 2 more answers

What is the total cost, including a 3% sales tax, the cost price of a cost priced at $120?

Aliun [14]

The total cost including taxes is $156

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3 years ago

Find the 2nd and 3rd term of the sequence 1, ___, ___, –11, –15, ...

Find the 2nd and 3rd term of the sequence 1, _, _, –11, –15, ...