Question

During the same journey, Stuart drove x miles for 2 hours, and 200 miles for 3 hours. Find x if the average speed for the entire journey is 70 miles per hour

Answer 1

hi

Answer 2

please help

Answer 3

yes

Answer 4

thier result is 150 mile

Answer 5

their

Answer 6

sorry it should be
x+200 = 70*(2+3)
x = 350-200 = 150

Answer 7

i overlooked the question.. Sorry!!!!

Answer 8

it is ok

Answer 9

thanks for oyur help

Answer 10

Distance = time x speed
therefore total distance is (2+3) times 70

Answer 11

ok thank you

Answer 12

but why you use " x + 200" ?

Answer 13

I don't really understand

Answer 14

because it is teh total distance travelled

Answer 15

*the

Answer 16

ok I understand now.

Answer 17

that's good ! :)

Answer 18

thanks

Answer 19

welcome :)

Answer 20

you still there?

Answer 21

Given the equations of the lines
(I) 2y + 3x = 3
(II) -3y - 2x = 5
(III) -6y + 4x = 9,
(IV) 2y + 6x = 9
which two lines are perpendicular?

A) (I) and (II)
B) (II) and (III)
C) (III) and (IV)
D) (I) and (III)
E) (IV) and (II)

Answer 22

please help me

Answer 23

Slope
(I) -2/3
(II)-3/2
(III) 3/2
(IV)-1/3
so (I) and (III) are perpendicular
answer is D
good answer plz XD

Answer 24

how you know (I) = -2/3?

Answer 25

general form of linear equation = ax+by+c =0
slope = -a/b
x-int - -c/a
y-int - -c/b

Answer 26

ok

Answer 27

thanks

Answer 28

If f(x) = (x + 1)2, then f(t + 2) =?

Answer 29

need help

Answer 30

If you reward your helper with good answer, he/she may come back and help you again.