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
ra1l [238]
3 years ago
10

Find the sum of the first 21 terms of the sequence 5, 9, 13, 17, 21, ... a. 945 c. 947 b. 944 d. 946

Mathematics
2 answers:
Alborosie3 years ago
6 0
See how the arithmetic sequence is made:
5, 5+4=9, 9+4=13, 13+4=17, ...
So the 21th term will be:
5( first term)+20( n-1 term)•4= 85
And the sum of the first 21 is :
21(5+85)/2= 21•45= 945
DIA [1.3K]3 years ago
4 0

Answer:A 945 is correct

Step-by-step explanation:

You might be interested in
The line of reflection is the ____. y-axis, center of rotation, x-axis
nydimaria [60]

Answer:The line of reflection is the y axis

Step-by-step explanation:

8 0
3 years ago
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
Semmy [17]
3√32x^4z

= 3√(2^5)* x^4 *z

(Square rooting the terms)

= 3*2*2*x*x√2*z

=12x^2√2z

7 0
3 years ago
Read 2 more answers
What is the polynomial function of least degree whose only zero are -4,2, and 3 ​
lesantik [10]

Answer:

polynomial is one. Because the zeros of a polynomial can be determined from the factors of a polynomial, the factors can be created from the zeros. For the zero which occurs at 2, 3 x x = -2/3, the factor which produced that zero is 2. 3 x §· ¨¸ ©¹ The multiplicity represents how many times that zero occurs, in other words, the degree of ...

Step-by-step explanation:

3 0
3 years ago
If ABCD is a parallelogram find the value of unknow size​
Keith_Richards [23]

Step-by-step explanation:

Hey, there!!

As it is a parallelogram, remember basic properties of parallelogram,

  • Their opposite sides are parallel and equal to eachother.
  • Their opposite angles are equal.
  • They have properties of parallel lines too.

Now, lets solve your question.

b = (7×10)°

Therefore, b= 70°.

now, (3x+10°)+b=180° { co- interior angle of a triangle sum is 180°}.

or, 3x= 180°-80°

or, x= 100°/3

Therefore, x= 33° { rounding off we get 33}.

w+ b =180°

w+70°=180° { coointerior angles are equal}.

Therefore, w =110°

<em><u>Hope it helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

5 0
4 years ago
When subtracting 537-443 why is there no digit in hundreds place?
jeyben [28]

Answer:

Because The Answer Is A 2digit Number=94

Step-by-step explanation:

537-443=94 Which Is A 2digit Number

6 0
3 years ago
Read 2 more answers
Other questions:
  • This week, Beth made 10 more than twice the number of cookies she made last week, x.
    8·1 answer
  • How do I solve this problem if x mean the missing number? <br> 16\3 = 12\x
    5·1 answer
  • what is the common difference between succeseive terms in this sequence? 9 , 2.5 , -4 , -10.5 , -17 ....
    13·1 answer
  • A clothing company sells slacks that are either blue or gray and pleated or non-pleated. Last month, the company sold 5 times as
    11·2 answers
  • How many times does the diameter go around a circle?
    13·1 answer
  • PLEASEEEE PLEASEEEE HELPPPP
    14·1 answer
  • Choose all the right answer for the text above.
    14·1 answer
  • Geometric proofs of segments
    14·1 answer
  • First to answer correctly gets brainlest no files or your answer is reported
    14·1 answer
  • Express the following equation in standard form and indicate the values of a,b and c 5x =y-14
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!