Answer:
Return trip travel time: 7h
Step-by-step explanation:
Let d be the distance.
Index 1 refers to initial trip, index 2 refers to the return trip.
v1=70mi/h
v2=40mi/h
t2=t1+3h, or t1=t2-3h (travel times)
d=v1×t1=v2×t2
v1×(t2-3)=v2×t2
v1 t2 -3 v1=v2 t2
v1 t2 - v2 t2=3 v1
t2(v1-v2)=3v1
t2=3v1/(v1-v2)
Or
t2=3×70/(70-40)=3×70/30=7h
Answer:
f( 6,7)
Step-by-step explanation:
D(3,2), E(7.2), and F(6,7). If you translate DEF 3 units right and 3 units down, what are the coordainatrs of D'?are 6,7
Answer:
-16
Step-by-step explanation:
4-8= -4 (-2-6t) if t=-1 instead of t besides 6 put -1 multiplier it which it will become positive.
-4(-2+6)
-4x-2=8, -4x6= -24
8-24=-16
trust me i know that i am right
Answer:
V ≈ 254.5 in³
Step-by-step explanation:
The volume (V) of the cylindrical tube is calculated as
V = πr²h ( r is the radius and h the height ) , then
V = π × 3² × 9 = π × 9 × 9 = 81π ≈ 254.5 in³ ( to 1 dec. place )
Answer:
YZ = 18
Step-by-step explanation:
XY = YZ because the line indicates they are the same length
XY = 18 so YZ = 18
