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3 years ago

Write down in terms of n the expression for the nth term of the following sequances :

Mathematics

1 answer:

DochEvi [55]3 years ago

3 0

1. $a_n=3n-1$
2. $a_n=2n+7$

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Meridian: the (imaginary) line between the south and North Pole which divides the earth in half

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3 years ago

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What is the midpoint between (-8, 5) and (2, -2)?

salantis [7]

Answer:

(3,1.5)

Step-by-step explanation:

first write the formula of finding the midpoint

step 1: M=(x1+x2÷2,y1+y2÷2)

step 2: substitute for coordinates x1,x2,y1 and y2

step 3:(-8+2÷2,5+-2÷2)

step 4: (-6÷2,3÷2)

step 5: (-3,1.5)

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3 years ago

The sum of 28 consecutive odd positive integers is a perfect cube. Determine the smallest possible set? What is the first and la

aleksandrvk [35]

Answer:

71 + 73 + ..... + 125 = 2,744 = $14^{3}$ .

Step-by-step explanation:

The smallest set starts at 71. The last term is 125.

The total is 2,744, which is $14^{3}$ .

3 0

3 years ago

What is the surface area of a cylinder

prohojiy [21]

S.A of cylinder (closed at both ends) is 2xrh + 2xr^2
S.A of cylinder (open at one end) is
2xrh + xr^2
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4 years ago

15. What is the area of ADEF shown in the figure? Show your work.

Mariulka [41]

Answer:

A = 189 yd²

Step-by-step explanation:

The area (A) of a triangle is calculated as

A = $\frac{1}{2}$ bh ( b is the base and h the perpendicular height )

Here b = DE = 21 , h = the line from F to DE = 18 , then

A = $\frac{1}{2}$ × 21 × 18 = 10.5 × 18 = 189 yd²

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2 years ago