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
Gala2k [10]
3 years ago
7

Write a rule for the nth term of the arithmetic sequence with a7=1 and a2=26

Mathematics
1 answer:
Ilia_Sergeevich [38]3 years ago
3 0
a_7=1;\ a_2=26\\\\a_n=a_1+(n-1)d\\\\a_7-a_2=5d\to5d=1-26\to5d=-25\to \boxed{d=-5}\\\\a_1=a_2-d\to a_1=26-(-5)=26+5=\boxed{31}\\\\\boxed{a_n=31+(n-1)\cdot(-5)=31-5n+5=\boxed{36-5n}}
You might be interested in
Beth is making fruit salad. She adds 4 grapes for every 2 strawberries. If she uses 20 strawberries, how many grapes will she us
tester [92]

Answer:

40 grapes

Step-by-step explanation:

20 strawberries / 2 = 10 strawberries

10 strawberries x 4 grapes = 40 grapes

5 0
3 years ago
What is the area of this triangle?
Ket [755]

Answer:

a

Step-by-step explanation:

The area (A) of a triangle is calculated as

A = \frac{1}{2} bh ( b is the base and h the perpendicular height )

Here b = 9 and h = 12 , then

A = \frac{1}{2} × 9 × 12 = \frac{1}{2} × 108 = 54 cm²

3 0
3 years ago
Read 2 more answers
What does 64 miles on 4 gallons equal?
denis23 [38]
2 gallons of gas because it uses 1 gallon every 16 miles, so 32 it's half 64 which means that it uses half of the gallons. hope  i helped

4 0
4 years ago
Determine whether each pair of segments is congruent
Dafna1 [17]

They are both labeled as 3 feet, so both must be equal, unless you doubt the labeling. Unless that is so, then both segments are equal.

6 0
4 years ago
Triangle A B C. Angle C is 80 degrees and angles B and A are y degrees. What is the value of y in the triangle? Angle y = °
Marrrta [24]

Answer:

50

Step-by-step explanation:

a triangle's sum of all angles is 180 degrees

so a+b+c=180

we know c=80

and a=b

so that'll be

2y+80=180

subtract 80 from each side

2y=100

divide by 2

y=50

4 0
3 years ago
Read 2 more answers
Other questions:
  • When telephone subscribers call from the National Magazine Subscription Company, 18% of the people who answer stay on the line f
    6·1 answer
  • Show work for all problems!
    13·1 answer
  • Triangle ABC is rotated 45° about point X, resulting in triangle EFD. If EF = 4.2 cm, DF = 3.6 cm, and DE = 4.5 cm, what is CB?
    8·2 answers
  • Y<2x+3
    14·2 answers
  • Cameron wants to measure a poster frame, but he only has a sheet of paper that is 8 1/2 b 11 inches
    12·2 answers
  • The length of a rectangular painting is 3 inches longer than its width. If the diagonal is 15 inches long, what is the length of
    12·1 answer
  • There are twenty-three red marbles and two blue marbles in a box. a marble is randomly chosen from the box, its color noted, the
    5·1 answer
  • Factor -1/4 out of -1/2x-5/4y.
    13·1 answer
  • Emily conducted a survey to find out the amount of time high schoolers spend surfing the Internet. From the data collected, the
    15·2 answers
  • Which represents the solution set of the inequality 5x-921
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!