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
GalinKa [24]
3 years ago
11

What is the sum of the first 11 terms of the arithmetic series in which a1= -12 and d=5?

Mathematics
1 answer:
SVEN [57.7K]3 years ago
3 0
Hello :  
the terme general is : an = a1 +(n-1)d
 a11 = a1+(11-1)×5
a11 = -12+50
a11 = 38
<span>the sum of the first 11 terms is : S11 = (11/2)(a1+a11)
</span>S11 = (11/2)(-12+38)
S11 = 143
You might be interested in
How do you illustrate quadratic equation in one varible?<br>​
kvasek [131]

Answer:

A quadratic equation is an equation of the second degree, meaning it contains at least one term that is squared. The standard form is ax² + bx + c = 0 with a, b, and c being constants, or numerical coefficients, and x is an unknown variable. One absolute rule is that the first constant "a" cannot be a zero.

Step-by-step explanation:

6 0
3 years ago
What is the value of x? <br> sin41°=cos x<br> Enter your answer in the box. <br> x = °
creativ13 [48]

Answer:

  x = 49°

Step-by-step explanation:

The sine of an angle is equal to the cosine of its complement:

  x = 90° -41° = 49°

5 0
3 years ago
Help a girl out with this problem
Masja [62]
The last choice because anything greater than a negative number eventually leads to the posetive numbers, plus substituting any posetive number aolves the inequality.
8 0
3 years ago
Every month, Jay pays $53.42 for his internet bill. How much did he pay for internet over the past 5 months?
Zinaida [17]

Answer:

ik the answer

Step-by-step explanation:

just multiply 5 x 53.42 and the answer is 267.1

3 0
3 years ago
Read 2 more answers
At a pizza restaurant it costs $4 to make a small pizza that sells for $12, and it costs $6 to make a large pizza that
exis [7]
Simply just divide there total investment for pizza with the cost for one small pizza 1100/4=275

275 Small pizzas were sold
5 0
2 years ago
Other questions:
  • What is the answer to 5 × 3/4=
    7·2 answers
  • Can someone help me with this one
    5·2 answers
  • Can you help me with this question
    6·1 answer
  • 6x^2 + 7x^3 + 9 what is the degree of the polynomial ?
    14·1 answer
  • In AGHI, the measure of ZI=90°, GH = 96 feet, and IG = 25 feet. Find the measure of ZH to the nearest tenth of a degree.​
    8·1 answer
  • If y = sin (ax + b), where a &amp; b are constants, which of these is true
    14·1 answer
  • Jason can travel 24 miles in 1/2 hour. What is his average speed in miles per hour
    13·1 answer
  • I'm in 5th grade and need help with and ​
    9·2 answers
  • I need help pls help me
    15·1 answer
  • 1. Determine if the lengths 9 cm, 13 cm, and 23 cm can form a triangle.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!