1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Serga [27]
3 years ago
15

Find the first term and common ratio for the geometric sequence a2 =2.5,a4=62.5

Mathematics
1 answer:
fenix001 [56]3 years ago
6 0

Answer:

a1 = 0.5; common ratio = 5

Step-by-step explanation:

Let the common ratio = r

a2 = 2.5

a3 = 2.5r

a4 = 2.5r * r = 2.5r^2

We are told a4 = 62.5, so

2.5r^2 = 62.5

Divide both sides by 2.5

r^2 = 25

r = 5

a2 = a1 * r

a1 = a2/r = 2.5/5 = 0.5

Answer: a1 = 0.5; common ratio = 5

You might be interested in
How Ro U Sovle This Problem Bc I Don't Know How?
marissa [1.9K]
You would have to transform the fractions to decimals by dividing. For the first one, if you divide 4 by 5 you get .8. To transform a decimal to percent you move the decimal place 2 times to the right or multiply by 100 (They both would give you the same thing)
3 0
3 years ago
How do you figure out a multiplecation equation​
Yuki888 [10]

Equations and Inequalities - Multiplication equations - First Glance. To solve a multiplication equation, use the inverse operation of division. Divide both sides by the same non-zero number. Click the equation to see how to solve it.

7 0
4 years ago
Combine the like terms -5.4v plus 0.3v
VladimirAG [237]

-5.4v+0.3v= -5.1v

Because both numbers have a common variable of 'v,' they can be combined.

6 0
3 years ago
How do I find the function that corresponds to this graph?
Vikentia [17]
Th graph of ln x is same shape as this excepts its pass through the point (1,0) and has an asymptote  x = 0

THis graph is the graph of ln x moved 1 unit to the left so its 

y = ln (x + 1)
4 0
3 years ago
:
Gnoma [55]

Answer:

a is the answer

Step-by-step explanation:

8 0
4 years ago
Other questions:
  • What is the remainder when (4x3 + 2x2 − 18x + 38) ÷ (x + 3)? 2 12 96 110
    15·2 answers
  • Solve. the square root of 44-2x = x-10
    6·2 answers
  • GH=KL<br> GH=6x+4<br> KL=10x-8<br> Solve for GH
    11·1 answer
  • Here are several recipes for sparkling lemonade for each recipe describe how many tablespoons for lemonade mix it takes per cup
    5·1 answer
  • The volume of the cell phone is 75 cubic centimeters. Write and solve an equation to find the height of the cell phone. Round yo
    15·1 answer
  • I need help wt this pls do it asap
    9·1 answer
  • A city planner makes a scale drawing of a proposed playground. The length of the actual playground is 78 feet, and the width is
    14·2 answers
  • Stephen buys a bag of cookies that contains 9 chocolate chip cookies, 7 peanut butter
    12·1 answer
  • Can someone please help me with this
    10·1 answer
  • Please i need help finishing this test i’ll give brainly to a correct answer
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!