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
Nastasia [14]
2 years ago
11

The second term of an arithmetic sequence is –5, and the third term is –20. What is the first term?

Mathematics
1 answer:
yaroslaw [1]2 years ago
8 0

Answer:

a₁ = 10

Step-by-step explanation:

The common difference d is calculated as

d = a₃ - a₂ = - 20 - (- 5) = - 20 + 5 = - 15

Then

a₂ - a₁ = d , that is

- 5 - a₁ = - 15 ( add 5 to both sides )

- a₁ = - 10 ( multiply both sides by - 1 )

a₁ = 10

You might be interested in
All the sides of a quadrilateral measure 5 cm. What else must be true about this shape? Select all that apply. a.The diagonals a
maksim [4K]

Answer:

a.The diagonals are congruent.

d. Opposite angles are congruent.

Step-by-step explanation:

From the above question, we are told that:

All the sides of a quadrilateral measure 5 cm.

This means this quadrilateral is a square.

The properties of a square states that:

1) Opposite sides of a square are equal each other or congruent.

2) Opposite angles are equal each other or congruent

3) Consecutive angles of a square are supplementary angles which means that they add up to 180.

4) A square has two diagonals and they are congruent or equal to one another.

Therefore, the correct options are options a and d

7 0
3 years ago
Help please !!!! ASAP
Julli [10]

Answer: 1: cant figure out sorry :(

2: 2.5

3: 5

4: 20

5: 25

10: 50

Step-by-step explanation: What i did here was divided by 5 the numbers below 3 and multiply by 5 for the numbers above 3. Hope this helps :)

5 0
3 years ago
What is the surface area of the pyramid?
UNO [17]

Answer:

The answer is 160 square inches

Step-by-step explanation:

I think is is : 160-6-8-8-6-8-6+8+8+8+8+8+2= 160

4 0
4 years ago
Read 2 more answers
Pamela drove her car 99 kilometers on 9 liters of fuel.
Andreyy89

Answer: 132 Liters

Step-by-step explanation:

Ap ex

7 0
3 years ago
Which statement about the functions Is true
jarptica [38.1K]

Answer:

the first option is the correct answer

8 0
3 years ago
Other questions:
  • If you have two pennies, the probability of both coming up heads when flipped is _____.
    13·2 answers
  • Which sequence of transformations could have been used to transform triangle ABC to produce triangle A"B"C"?
    14·1 answer
  • Solve for x. 3(x 2) 4(x - 5) = 10
    5·1 answer
  • What are compatible numbers?
    14·1 answer
  • Evaluate the expression for g = 6 and h = -1.<br><br> gh − 3 =
    7·2 answers
  • Please help with answers and showing the work
    10·1 answer
  • Yola paid $20 for 8.7 gallons of gas. victor paid $30 for 12.4 gallons. compare the price per gallon to fined who got the better
    13·1 answer
  • Solve for x if 2(x - 2) = 26<br><br> A) x=25<br> B) x=8<br> C) x=15<br> D) c=30
    12·2 answers
  • Please help.<br><br> Find the lateral area and total surface area of the prism.
    6·1 answer
  • Farmer Dan wants to build a new pen for his pigs using 200 feet of fencing. He wants the pen to be in
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!