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
myrzilka [38]
3 years ago
11

Summation notation help!!!!

Mathematics
1 answer:
solniwko [45]3 years ago
4 0

3 is always on the numerator. It is not effected by a power. The answer has to be something that leaves the numerator alone. That means that B is not correct.

The answer is going to be something that makes the denominator 1 when n = 1. That's going to be the answer to the question, because the first term in the sequence is just 3. The denominator must be 1. (not zero).

D is not the answer, because 3/5^1 = 3/5, so D is wrong.

A is not going to get us anywhere either. 3/5^(1 + 1) = 3/5^2 = 3/25 which is not the first term.

The only choice we have left is C. It must be the answer. 3/5^(1 - 1) = 3/5^0 = 3/1 = 3. There's your answer. Note anything raised to the zero power = 1.

You might be interested in
Answer all for Brainliest (easy math) 5 questions for 30 points
sweet-ann [11.9K]

1) The caterpillar was already at 4.5 feet so 4.5 will be added. If it crawls upwards 38 of an inch every minute and the amount of minutes is not specified, this will be represented as 38x. That means the answer is C. f(x) = 38x + 4.5

2) Substitute the known values into the equation. There are 7 people at $8.25 a person, which is a total of $57.75 <u>I used 7 because he invites 6 friends, plus himself. </u>He only has $50 on his gift card, so he won't have enough to cover the cost. The answer is A.

3) They start out with 40lbs and recieve 120 more. They have 160lbs in total. If they sell 8lbs a day for 5 days, thats 8*5 or 40lbs total. 160 - 40 = 120lbs left after 5 days. I'd say the answers are A, B, and D.

4) I think the answer would be C because 1,500 is used to find the number of grams of isotope present after t years. The number of grams can't be 1,500. I hope that makes sense because I'm not sure how to explain it.

5) The growth factor is 2 (2x, x being the number of hours). Multiply by 15 because the lab has 15 of them. The answer is B. f(x) = 15 * 2x

I hope this helps you! I'm sorry if I got any of them wrong!

7 0
4 years ago
If you roll the cube 120 times, how factors of 6?
Olegator [25]

Answer:

120/6=20

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Can someone help me with this proof
maksim [4K]

Step-by-step explanation:

Given :

Given that lines a and b are parallel, angles 1 and 5 are congruent because they are corresponding angles, and angles 1 and 4 are congruent because they are vertical angles

To find : by which property are angles 4 and 5 congruent

Solution :

We know that if two parallel lines are cut by a transversal, then the pairs of alternate interior angles are congruent.

Also, we know that if two things are equal to the same thing then they are equal to each other . In this case, we can say that if two angles are congruent to a third angle, then they are congruent to each other. As angles 4 and 5 are both congruent to angle 1, they are congruent to each other but angles 4 and 5 are alternate interior angles. So, if parallel lines have a transversal, alternate interior angles are congruent.

8 0
3 years ago
PLEASE HELPP!! How do I solve 4(x-8) = -2(x-5). Picture above.
dimulka [17.4K]

Answer:

x=7

Step-by-step explanation:

4(x-8)= -2(x-5)

4x+32= -2x+10

+2x          +2x

6x-32=10

    +32    +32

6x= 42

divide by 6 on both sides

x=7

6 0
3 years ago
Pls i need the help.<br>​
Andrei [34K]

Answer:

#3. 16a + 24b

Step-by-step explanation:

P= 2( length plus width).

4 0
3 years ago
Read 2 more answers
Other questions:
  • HELPPPPPP PLEASE
    8·1 answer
  • What is the input value other than 0 for which f(x)=−2
    7·1 answer
  • Trapezoid JKLM is a cross section of a lampshade. The diagonals of JKLM are congruent, and the measure of ∠J is 65degrees. What
    15·1 answer
  • Help!! WILL GIVE BRAINLIEST!!! What is the range of possible sizes for side x? Please explain about the rule as well.....
    15·1 answer
  • At the end where it’s cut off it says figures thank you please help ASAP
    9·1 answer
  • PLEASE HELP I WILL GIVE BRAINLiST <br><br><br>Write the equation of the circle graphed below.
    6·1 answer
  • 26x + 14 = 49x - 13 <br>Represent x on the number line and also find x​
    15·1 answer
  • Which of the following is an equation?<br> A y/9 - 3<br> B y/9 = 3<br> C 9 - 3
    14·2 answers
  • PLEASE HELP NOW!!!!!!!!!!!!!!!!!!!
    11·1 answer
  • Which equation has a solution of r = 1/3
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!