How come 1+1 is 2 but 2+2 isn’t 3 may seem silly but think about it

Can someone me with this? write an even number that has a 7 in the hundreds place, an odd number in the thousands place, and is a multiple of

Arunning track in the shape of an oval is shown. the ends of the track form semicircles. a running track is shown. the left and right edges of the track are identical curves. the top and bottom edges of the track are straight lines. the track has width 56 m and length of one straight edge 130 m. what is the perimeter of the inside of the track? (π = 3.14) 260.00 m 347.92 m 372.00 m 435.84 m

What signals you that factoring by grouping is the best method to use when factoring a problem?