Trent508 Trent508

02-09-2014
Mathematics

contestada

The 10th and the 20th term of an arithmetic sequence are 10 and 40, respectively. Find its 100th term.

Respuesta :

crisforp crisforp

02-09-2014

a 10 = 10;
a 20 = 40;
a n = a 1 + ( n - 1) * r => 10 = a 1 + 9 * r, and, 40 = a 1 + 19 * r => 30 = 10 * r => r = 3 => a 1 = 10 - 27 => a 1 = -17;
a 100 = a 1 + 99 * r => a 100 = - 17 + 99 * 3 => a 100 = -17 + 297 => a 100 = 280.

Answer Link

Otras preguntas

In comparing capitalism, socialism, and communism, socialism is most related to communism capitalism market economy small government

Question partpointssubmissions usedthe base of a circular fence with radius 10 m is given by x = 10 cos(t), y = 10 sin(t). the height of the fence at position (

At Ree Ski Center, the most people will pay for a neck warmer is $10. The manager of Ree Ski Center knows he needs a 30% markup based on cost. What is the most

find the measure of each interior angle AND each exterior angles of the following polygons. Show your work. A.) Pentagon. B.) 16-gon. C.) Dodecago

Discussion 5.1 - bridging and connections as we prepare to discuss week 5 materials, let's conclude week 4 on the inner experience of conflict. include proper c

Why is the answer B?

Which expression can be used to determine the slope of the linear function graphed below?

Solve 5r2 – 12 = 68. {±4} {±5} {±3} {±6}

How do health maintenance organizations (HMOs) and preferred provider organizations (PPOs) differ? A. HMOs provide health insurance for older adults; PPOs p

D says none of the above please answer