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
dybincka [34]
3 years ago
14

What is the sum of the finite arithmetic series (-5)+0+5+10+ ......+65

Mathematics
1 answer:
Alex17521 [72]3 years ago
5 0

If you want to solve this problem using formulas, there are two important formulas:

t1  =  first term  =  -5          

tn  =  nth term  =  last term  =  -5

n  =  numbr of terms

Sn  =  sum of the n terms

tn  =  t1 + (n - 1)d     --->     65  =  -5 + (n - 1)(5)

                                          65  =  -5 + 5n - 5

                                          65  =  -10 + 5n

                                          75  =  5n

                                            n  =  15

Sn  =  n(t1 + tn)/2     --->     Sn  =  15(-5 + 65)/2

                                          Sn  =  450


So ur answer rounds up to 450


Letter c

:)

hope i helped 


~Luis

You might be interested in
Jay places $3200 in an investment account earning 4.1% interest compounded weekly. How much money would he have in the account a
jasenka [17]

Answer:

A = $3,926.71

Step-by-step explanation:

Given: Principal (P) = $3200, Annual Rate (R) = 4.1%, Time = 5 years

To find: How much money would he have in the account after 5 years, if he made no deposits or withdrawals during that time?

Formula: A = P(1 + r/n)^nt

Solution: Compound interest is one of the most important concepts to understand when managing your finances. It can help you earn a higher return on your savings and investments, but it can also work against you when you're paying interest on a loan

First, convert R as a percent to r as a decimal

r = R/100

r = 4.1/100

r = 0.041 rate per year,

Then solve the equation for A

A = P(1 + r/n)^{nt}

A = 3,200.00(1 + 0.041/12)^{(12)(5)}

A = 3,200.00(1 + 0.003416667)^{(60)}

A = $3,926.71

Hence, Jay would have $3,926.71 after 5 years is if he made no deposits or withdrawals during that time.

3 0
3 years ago
Hello can someone please help?
Ray Of Light [21]
The answer is D
Hope this helps
7 0
3 years ago
If f(x) =3x and g(x) =2x, what is (g*f)(x)
alekssr [168]

We are given f(x) =3x and g(x) =2x

Now we have to find (g*f)(x).

so (g*f)(x) means we multiply f(x) and g(x).

So multiplying 3x and 2x,

3x * 2x = 6x²

So (g*f)(x) =6x²

4 0
3 years ago
Read 2 more answers
How many lines of symmetry does the<br> figure below appear to have?
Vaselesa [24]

Answer:

here is only one line of symmetry

4 0
3 years ago
Read 2 more answers
What is the answer for 2x=-6 and how do you show your work?
Step2247 [10]

Answer:

x = -3

Step-by-step explanation:

2x = -6

You want to get x on it's own, so divide both sides by the coefficient, 2.

2x/2 = -6/2

x = -3

7 0
3 years ago
Read 2 more answers
Other questions:
  • A box contains 4 green shirts, 3 blue shirts, 3 white shirts, 5 pink shirts, 2
    15·1 answer
  • A worm travels 1,250 millimeters.How many meters did the worm travel
    15·1 answer
  • Help
    5·1 answer
  • ????????????????<br> x²-17x+30=0
    13·1 answer
  • If P is the preimage Of a point, then it’s image after a dilation centered at the origin with the scale factor k is the point p
    15·1 answer
  • V^2=12^2+2(-6)(9) answer please i am waitind
    13·2 answers
  • Helpppp please.........
    12·1 answer
  • I WILL GIVE BRAINLY! PLEASE HELP! PLEASEEEEE!!
    9·1 answer
  • Find the scale factor of the dilation. Then tell whether the dilation is a reduction or an enlargement.
    10·1 answer
  • Help with 35 36 37 38
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!