There are a total of 108 bikes. if the ratio of blue bikes to black bikes is 4 to 5,how many of the bikes are blue

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20

Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.