2 years ago

Find the 2nd term of an arithmetic sequence with t5 = 3 and t7 = 7?

1 answer:

6 0

Let a be the first term and d be the common difference

t5 = 3 = a + 4d
t7 = 7 = a + 6d

a + 6d - a - 4d = 7 - 3
2d = 4
d = 2

Sub d = 2,
3 = a + 4(2)
a = -5

t2 = a + d
t2 = -5 + 2
t2 = -3

You might be interested in

Solve the decimal division application round to the nearest 10th if needed there are approximately 39.37 inches in 1 m determine

Shtirlitz [24]

Answer:

D. 1000 meters

Step-by-step explanation:

(39370 in)/(39.37 in/m) = (39.37×1000)/(39.37) m = 1000 m

3 0

3 years ago

Solve by using square roots. 6x^2−27=39

Bingel [31]

Answer:

Simplifying

x = 11

Step-by-step explanation:

Simplifying

6x + -27 = 39

Reorder the terms:

-27 + 6x = 39

Solving

-27 + 6x = 39

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '27' to each side of the equation.

-27 + 27 + 6x = 39 + 27

Combine like terms: -27 + 27 = 0

0 + 6x = 39 + 27

6x = 39 + 27

Combine like terms: 39 + 27 = 66

6x = 66

Divide each side by '6'.

x = 11

Simplifying

x = 11

6 0

2 years ago

The faces of a triangular pyramid have a base of 5 cm and height of 11 cm. What is the lateral area of the pyramid?

horrorfan [7]

I think 55 because you would multiply 11×5

7 0

3 years ago

Y+1=3/4(x+3) in general form pls??

Vikentia [17]

Answer:

Step-by-step explanation:

y+1 =(3/4)x+9/4

y=(3/4)x+1/4

7 0

2 years ago

Read 2 more answers

Pls help plsssssssssssssssssssssssssssssssssss

lozanna [386]

Answer:

i belive its 1

Step-by-step explanation:

Because its SUM so its adding and the sum is 22 and 20+2=22.

6 0

2 years ago