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
sweet [91]
3 years ago
6

For an arithmetic sequence where a1 = 13 and the common difference is 3, find s7.

Mathematics
1 answer:
melamori03 [73]3 years ago
7 0

Answer:

Answer:

D ) 154

Step-by-step explanation:

a 1 = 13,  d = 3;

S n = n/2 * ( a 1 + a n )

a 7 = a 1 + 6 d = 13 + 3 * 6 = 13 + 18 = 31

S 7 = 7/2 * ( 13 + 31 ) = 7/2 * 44 = 154

You might be interested in
What is the area of the triangle shown?
VLD [36.1K]

Answer:

C

Step-by-step explanation:

The formula for area of a triangle is LH/2

when L is 15 and H is 12

8 0
3 years ago
Read 2 more answers
(sint-cost)²=1-sin(2t)
Gemiola [76]

i dont know the way you wan me to solve this but i got 1−2cos(t)sin(t)=1−2sin(t)cos(t)

4 0
2 years ago
A and B are partner in a business .A contribution RS 20000 and B rs 30000 a however acts as a manager the understanding being th
Vesna [10]

Answer:

Rs 1,650

Step-by-step explanation:

The given contribution are;

<em>A</em> contributes Rs 20,000, and <em>B</em> contributes Rs 30,000

The percentage of the profit <em>A</em> receives as manager = 25%

The amount of the profit divided in the ratio of their contribution = The remaining profit (75%)

The amount <em>B</em> gets = Rs1,350

The amount <em>A</em> gets = required

The ratio of their contribution at which the remaining profit is shared = 20,000:30,000 = 2:3

Where, out of 5 parts of 75% of the profits, <em>B</em> gets 3, while <em>A</em> gets 2

Let <em>P</em> represent the profit, we have;

B's share = 3/5× 0.75 × P = 1,350

∴ P = (5 × 1,350/3)/0.75 = 3,000

<em>A</em> gets 25% of the profits and 2/5 of the 75% remaining profit

∴ The amount <em>A</em> gets = 0.25×3000 + (2/5)×0.75×3000 = 1,650

Or simply put;

<em>A</em> gets the remainder of the profit which is Rs 3,000 - Rs 1,350 = Rs 1,650

8 0
2 years ago
10 times as many as _ hundreds is 60 hundreds or _ thousands
Lady_Fox [76]

60 hundreds means 6000 = 6 thousands;

So, 10 · x = 6000;

x = 600;

600 means 6 hundreds;

Finally, 10 times as many as 6 hundreds is 60 hundreds or 6 thousands.

6 0
3 years ago
Which function has the same y-intercept as the function y equals 2/3 x - 3​
aleksley [76]

We have the function y = \frac{2}{3} x -3 and we want to find a function that has the same y-intercept than the previous function.

First, let's find the y-intercept by subtituting 0 for 'x'.

y = \frac{2}{3} (0) -3 = -3

Now that we found that y-intercept =-3, any lineal function of the type: y = ax - 3 will have the same y-intercept. Where 'a' can take all the real values.

Also, any quadratic function of the type: y=ax^{2} + bx - 3 will have the same y-intercept. Where 'a' and 'b' can take all the real values.

6 0
3 years ago
Other questions:
  • Solve the proportion y/22=3/11
    7·1 answer
  • Neilson Company publishes data on the typical American and his television viewing habits. Fifteen adults filled out questionnair
    8·1 answer
  • What is the measure of ∠Q?
    8·1 answer
  • 9 increased by 6 can be stated as the total of 9 and 6.
    10·2 answers
  • Look at the figure shown below:
    6·2 answers
  • If the r-value, or correlation coefficient, of a data set is 0.934, what is the
    13·1 answer
  • What does it mean for a savings account to have a minimum balance?
    5·2 answers
  • 6/7 liters of orange juice was shared equally amoung 3 students. How much orange juice did each student get? Give your answer in
    5·1 answer
  • If a figure has been dilated by a scale factor of one third, which transformation could be used to prove the figures are similar
    10·2 answers
  • Out of the 83 peices of candy in the bag, Fred couldn't eat 15 of them. What percent of candy could Fred not eat? (Round to the
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!