Let {e⃗ 1, e⃗ 2, e⃗ 3, e⃗ 4, e⃗ 5, e⃗ 6}{e→1, e→2, e→3, e→4, e→5, e→6} be the standard basis in r6r6. find the length of the vector x⃗ =−2e⃗ 1+5e⃗ 2−5e⃗ 3+4e⃗ 4−3e⃗ 5+5e⃗ 6x→=−2e→1+5e→2−5e→3+4e→4−3e→5+5e→6.

Which equation is true? i. 56 ÷ 4·7 = 82 ÷ (11 + 5) ii. (24 ÷ 8 + 2)3 = (42 + 9)2 neither i nor ii ii only i and ii i only

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?