All categories

3 years ago

Find an explicit formula for the following sequence, an, which starts with a1=7. 7,−14,28,−56,112,…

Mathematics

2 answers:

Digiron [165]3 years ago

6 0

Answer:

simply multiply each number by -2

Step-by-step explanation:

7 * -2 = -14 -14 * -2

brainliest answer plz!

natali 33 [55]3 years ago

5 0

Answer:

aₙ= 7*(-2)ⁿ⁻¹

Step-by-step explanation:

7,−14,28,−56,112,…

This is a GP with first term of 7 and common ratio of -2

a₁=7

r= -2

aₙ= 7*(-2)ⁿ⁻¹

You might be interested in

What is the slope? will mark Brainly

Yanka [14]

Answer:

5/6

Step-by-step explanation:

................

5 0

3 years ago

Give the measure of angle C. <br>20° <br>180°<br>70°<br>110°

tigry1 [53]

Answer:

C=110

Step-by-step explanation:

Angle C and the angle labeled 110 are alternate interior angles if the lines are parallel. Alternate interior angles are equal

C=110

8 0

2 years ago

Read 2 more answers

As a salesperson, you are paid $50 per week plus $2 per sale. This week you want your pay to be at least $100. What is the minim

DENIUS [597]

Let s represent the number of sales, and t the total pay
the equation to represent this situation is t = 2s + 50
so set t to 100, and solve for s

100 = 2s + 50
50 = 2s
25 = s

you need to make at least 25 sales

5 0

4 years ago

Which system of inequalities represents the graph?

vfiekz [6]

Yes the first one is the correct answer in this form of a graph

4 0

3 years ago

A long distance runner does a first lap around a track in exactly 50 seconds.As she tires.Each subsequent lap takes 20% longer t

madreJ [45]

Answer:

182 seconds

Step-by-step explanation:

Given:

Time taken for first lap is 50 seconds and each subsequent lap takes 20% longer than previous

Solution:

Time taken for first lap = 50 sec

For second lap

Each subsequent lap takes 20% longer than previous

Previous lap time = 50 sec

second lap = 50 + 20% of 50

second lap $=50+(\frac{20}{100}\times 50)$

second lap $= 50 + 10$

second lap $= 60\ sec$

For third lap

Each subsequent lap takes 20% longer than previous

Previous lap time = 60 sec

Third lap = 60 + 20% of 60

$Third\ lap = 60 + (\frac{20}{100}\times 60)$

$Third\ lap = 60+2\times 6$

$Third\ lap = 60+12$

$Third\ lap = 72\ sec$

Time taken for 3 laps is equal to sum of all three laps time.

$Tiem\ taken\ for\ 3\ lap = 50+60+72$

$Tiem\ taken\ for\ 3\ lap = 182\ sec$

Therefore, it takes 182 seconds (3 min, 2 seconds) to run three laps

6 0

4 years ago