At noon Elena left Kansas City and headed South at 50 kilometers per hour (ph). At 4:00 pm. Grace left Kansas City and headed South If Grace was 20 km ahead of Elena at 9:00p. m, what was Grace's speed?

Choose one answer
a 94 kph
b 72 kph
c. 60 kph
d. 86 kph

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

Me with this assignment ! i only partially understand, so explain. also it's a work sample. at the championship bike race, steve and paula were fighting for first place. steve was 175 feet ahead of paula and had only 300 feet left to go. he was very tired and was going only 9 feet per second. paula was desperate to catch up and was going 15 feet per second. who won the bike race and by how far did she/he win?

Multiply and simplify. 2x^2 y^3 z^2 · 4xy^4 x^2 i will mark you brainliest if right. show how you got the answer, !