ImmortalFusedZamasu ImmortalFusedZamasu

02-07-2018
Mathematics

contestada

Please Help??

What is the sum of the last four terms of the series 7 + 9 + 11 + ..... + 21?

A. 72

B. 40

C. 112

Respuesta :

jdoe0001 jdoe0001

02-07-2018

well, if you notice, is just an arithmetic sequence, is adding 2 to get the next term.

so the last term is 21, so the one before that has to be 21-2 or 19, and the one before that 17 and the one before that 15.

15+17+19+21.

Answer Link

Otras preguntas

explain the effect of mining on the environment

1)How are the animals grouped?2)In which group,A or B,will you place a mosquito?

Ms. De Leon wants to produce different sets of test questions for her essay test. If she plans to do this by putting together 3 out of 5 questions she prepared,

A plane is travelling at 250km/h and must reach a target that is 3h 58min away. The distance to the target is. * A) 1000km B) 89500km C) 62.5km D) not enough in

Please help I’ll mark Brainlyist and will give heart <3 what was the importance of the fundamental orders of Connecticut? (No g00gl, copy and paste or pla//

Apply the distributive property to create an equivalent expression. (15 + 10)

If a varies inversely with b, and a=20 when b=1/4, find the equation that relates a and b

solve for y pleaseeee

What is my answer the missing numbers

Can someone help with this question, DUE now