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

Need answer ASAP!!!!!

MissTica

Answer:

30/42 = 10/14 = 5/7

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Two whole numbers A and B satisfy the following conditions. Find A and B . A + B = 44. A : B is equivalent to 4 : 7

aksik [14]

Hello there, multiply to each side of ratio until you get the answer, which in this case you have to multiply 4 to each side, therefore...
B= 28
A= 16.
Hope this helps!!

~Brainliest

3 0

3 years ago

Solve the equation of isosceles triangle and find the x

Fantom [35]

Answer:

x = 25°

Step-by-step explanation:

2x-10°+2x-10°+100°=180°[sum of angles in a triangle ]

4x+80°=180°

4x=100°

x=25°

5 0

2 years ago

Write an equation of the line with the given slope and y intercept: m = 2, b = - 3/4

Alex

Answer:

y = 2x - 3/4

Step-by-step explanation:

Adapt the slope-intercept form: y = mx + b.

Making the indicated substitutions, we get

y = 2x - 3/4

4 0

3 years ago

Checking account a has a service fee of $3 and a per check fee of $0.02 while checking account b charges a monthly fee of $2

Alecsey [184]

Idk how to answer this

6 0

3 years ago

Read 2 more answers