T=time
d=st
r=train speed
p=plane speed
<span>160=rt
</span><span>720=pt
speed of plan is 20kmph less than 5 times speed of train
p=5r-20
we notice that 160 times 4.5=720
times first equaton by 4.5
720=4.5rt
720=pt
set equal
4.5rt=pt
divide both sides by t
4.5r=p
sub </span><span>p=5r-20 for p
4.5r=5r-20
minus 4.5r from both sides
0=0.5r-20
add 20 to both sides
20=0.5r
times 2 both sides
40=r
sub back</span><span>
p=5r-20
p=5(40)-20
p=200-20
p=180
plane is 180kmph
train is 40kmph
</span>
We are asked to calculate the product:
By rewriting the square roots as a power, we can easily solve the expression, in fact:
so, the correct answer is A) y^3
Answer:
(-7,8.5)
Step-by-step explanation:
On a reflection off the y-axis, the x value gets negated. So 7 would become -7.
Answer:
66°
Step-by-step explanation:
There are so many ways to get this answer. Angle seven and 5 are vertically opposite so they're equal. Angles 4 and 5 are co-interior so they add up to 180°. If 180 is the total of 4+5, and 5 is 114 then 4 = 180-114 which is 66.
Angles 7 and 3 are corresponding and corresponding angles are the same. 3 and 4 are on a straight line so they add up to 180. 180-114= 66
You can also use angles 8,6 and 2 to get your answer
