2 years ago

The first two terms of an arithmetic

Mathematics

1 answer:

erica [24]2 years ago

8 0

Answer:

Number of term n = 12

Step-by-step explanation:

Given:

a1 = -2

a2 = 3

Sum = 306

Find:

Number of term n

Computation:

d = a2 - a1

d = 3 - (-2)

d = 5

Sn = n/2[2a + (n-1)d]

306 = n/2[2(-2) + (n-1)5]

612 = n[-4 + 5n -5]

5n² - 9n - 612 = 0

Number of term n = 12

You might be interested in

The volume of a right circular cylinder with a base diameter of 8 in. and a height of 6 in. is ___π in3.

Arada [10]

Answer:9

Step-by-step explanation:

This can is a right circular cylinder with a diameter of 5 inches and a height of 5 inches. What is the surface area of the can in terms of π?

3 0

2 years ago

45 × ÷ 15 = 45 please answere me

Bingel [31]

Answer:

Step-by-step explanation:

multiply both sides by 15

45x=675

Divide both sides by 45

x=15

5 0

2 years ago

For each of the following quadrilaterals, Select all the properties that must be true.

OleMash [197]

Answer:

1) two pairs of parallel sides

2) four right angles and all sides congruent

3) all sides congruent

Step-by-step explanation:

8 0

3 years ago

What is 281.1025 in word form?

Delvig [45]

Two hundred Eighty One Point One Twenty Five Thousandths.

8 0

2 years ago

The base of a right pyramid is a regular hexagon with sides of length 12 m. The altitude is 6 m. Find the total surface area of

Eva8 [605]

Answer:

806.12 m

Step-by-step explanation:

Step 1: Write the data

Side (s) = 12

Altitude (h) = 6

Step 2: Write the formula for surface area of right hexagonal pyramid

Area = 3√3/2*s² + 3*s*√(h²+3s²/4)

Step 3: Substitute values of 's' and 'h'

Area = 3√3/2*(12)² + 3*(12)*√[6²+3(12)²/4]

Area = 806.12 m

Therefore, the total surface area of the pyramid is 806.12 m.

4 0

2 years ago