2 years ago

The 80th term of an arithmetic sequence is twice the 30th term. If the first term of the sequence is 7, what is the 40th term?

1 answer:

8 0

It seems that "d" or the common difference is a number that makes the sequence go into the larger positive realm of numbers. Therefore, 2*(7+30d)=7+80d. d=35/100. Now just do 7 + 40(35/100) = 21. 21 is your answer!

You might be interested in

Triangle LMN with vertices L(-9,-1) M(-3,-4) and N(-5,-8)

pishuonlain [190]

Answer:

Part A: L(-1,9) M(-4,3) N (-8,5)

Step-by-step explanation:

4 0

2 years ago

Haben knows that the angle of elevation from the top of a rock formation to a stake in the ground 50 feet from its base is 42°.

Murrr4er [49]

Answer:

The height of the rock formation is $45.02\ ft$

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

$tan(42\°)=h/50$

solve for h

$h=50*tan(42\°)=45.02\ ft$

4 0

3 years ago

Read 2 more answers

Use the common multiple of 24

max2010maxim [7]

Answer:

24, 48, 72, 96, 120

Step-by-step explanation:

I can keep going on but i learned to just put at least 5 and if the person needs more then just give them ten more

8 0

3 years ago

Can someone help I cant understand a method for this pls ASAP

kvv77 [185]

Answer:

105 hours

Step-by-step explanation:

→ Find how many days in a week

→ Multiply this by his gaming time

7 × 15 = 105

3 0

2 years ago

Read 2 more answers

A triangle with three 60° angles is always a/an _______________ triangle.

ki77a [65]

It’s called an equilateral triangle because all sides are even. A triangle equals 180 degrees. So, 60 degrees x 3 sides = 180 degrees

7 0

2 years ago