binfor213 binfor213
  • 15-08-2017
  • Mathematics
contestada

The first square number is 1, and the sum of the first 20 square numbers is 2870.

Work out the sum of the first 21 square numbers

Respuesta :

cubstellationoupyb6
cubstellationoupyb6 cubstellationoupyb6
  • 15-08-2017
21²=21×21
21×21=441

2,870+441=3,221
Answer Link

Otras preguntas

Mr.Jenkins wants to distribute 40 fliers. He distributed 30 fliers so far. What percent of the total number of fliers has Mr. Jenkins distributedÉ
What do frogs do on land and in water?
Which of the following is not a perfect square trinomial?1)144 + 12y + y^22)100 + 20y + y^23)64 − 16y + y^24)25 + 10y + y^2i need help with this one, please...
salt & sugar do not appear to have a fix shape.why do we call them solid
Factor completely 4u^2 + 28u + 49
What's pathagrium theory
1. What is the shortest distance from a point to a line?A) a perpendicular segmentB) a transversalC) a parallel segmentD) an arc
what is the ratio of X:Y. 12Y equal 7X
When was Renny Mackintosh born ?
What's pathagrium theory