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
Gelneren [198K]
3 years ago
15

Let $a_1$, $a_2$, . . . , $a_{10}$ be an arithmetic sequence. If $a_1 + a_3 + a_5 + a_7 + a_9 = 17$ and $a_2 + a_4 + a_6 + a_8 +

a_{10} = 15$, what is the value of $a_1$?
GIVING BRAINLIEST>
Mathematics
1 answer:
vfiekz [6]3 years ago
7 0

So

a be first term and d be common difference

  • a+a+2d+a+4d+a+6d+a+9d=17
  • 5a+21d=17--(1)

And

  • a+d+a+3d+a+5d+a+7d+a+9d=15
  • 5a+25d=15--(2)

Eq(1)-Eq(2)

  • -4d=-2
  • d=1/2

Put in second one

  • 5a+25d=15
  • a+5d=3
  • a+5/2=15
  • a=15-5/2
  • a=25/2
You might be interested in
Help pls !!! It’s for a test
andrew11 [14]
Y=2x i guess!!!!! good luck
6 0
3 years ago
I need help with question 11-21 show your work please and thank you!
Varvara68 [4.7K]

The computation shows that the thickness of the beam is 3.75 inches.

<h3>How to calculate the values?</h3>

11. The thickness of the beam will be:

= 3/4 inch × 5

= 3.75 inches.

12. The length of the board will be:

= 7 5/8 × 5

= 38.125 inches.

13. The total height of the stairs will be:

= 8 3/16 × 13

= 106.4375 inches.

14. The height of the stack will be:

= 55 × 3/8in

= 20.625 inches.

15. The length of the board will be:

= 3/4 × 86 1/4

= 64.6875 inches.

16. The number of hours that it'll take to replace the trim will be:

= 37 1/2 × 1/4

= 9.375 hours.

17. The height of the will required will be:

= 22 × 5/12

= 9.167 feet

18. The inches removed from the wood will be:

= 1/16 × 7

= 0.4375 inches.

19. The shortest finish stock will be:

= 3/16 × 15

= 2.8125 feet.

20. The total amount of board wasted will be:

= 3/16 × 11

= 2.0625 inches.

21. The total rise in the staircase will be:

= 22 × 7 3/8

= 162.25 inches.

Learn more about computations on:

brainly.com/question/4658834

#SPJ1

4 0
2 years ago
The Murphy family is on a road trip. On the first day, they traveled 30% of their total distance. On the second day, they travel
olga_2 [115]

Answer:

\frac{11}{20}

On the first day, they traveled 30 percents of the total distance. On the second day they traveled one fourth of the total distance. One fourth converted into percentage is 25 percent. Then you add 30 plus 25 because that is the to a

total distance that Murphy's family traveled for 2 days. It will be 55 percents, and you convert 55 percents into fraction will be 55/100, and you simplify it, will be 11/20.

7 0
4 years ago
Find y when x = 14, if y = -3 when x = 6.
ladessa [460]

Answer:

y=5

Step-by-step explanation:

6-(-3)=9

so...

14-9=5

7 0
3 years ago
Fx) = 3x+2<br> What is f(5)?
Alexeev081 [22]

Answer:

the correct answer is 17

4 0
3 years ago
Other questions:
  • The length of ZX is 2 units. What is the perimeter of triangle XYZ?
    6·2 answers
  • How do you know that 50 is not a perfect square?
    10·1 answer
  • A builder purchases 600 bricks for a new residential construction. The dimensions of each brick are 5.1 cm by 10.2 cm by 20.3 cm
    9·2 answers
  • List the following fractions from least to greatest.
    5·1 answer
  • Work out the following, giving your answer to the simplest form 5 3/5/2 2/3
    9·1 answer
  • How to find the square root of 5x-25=0
    8·1 answer
  • What is the volume of a cylinder with a radius of 7 and the height of 9​
    7·2 answers
  • which property can you use to solve the following expression?5(6+9) A) distributive B) associative C) commutative
    7·1 answer
  • 99 POINTS- will mark branliesttt In each of the following graphs, the two given polygons are similar. Write precisely a single d
    12·2 answers
  • Which equation best represents the data? y = –1.026x2 1016.402x – 162075 y = –1.036x2 1024.771x – 163710 y = 298.214x – 66317.66
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!