Answer:
Speed of train from station M = 85 miles per hour
Speed of train from station N = 90miles per hour
Step-by-step explanation:
Given that the distance between two points M and N is 380 miles
Suppose the speed of train M is x
So, the speed of train N is 5 + x
Formula to use:
distance = speed x time
For the train from point M
d = x * 2
d = 2x
For the train from point N
d = (5 + x) * 2
the above 2 distances plus 30 miles equals 380 miles
Equation:
2x + 2(x+5) + 30 = 380
2x + 2x + 10 + 30 = 380
4x + 40 = 380
4x = 380 - 40
4x = 340
x = 340/4
x = 85 mph for train M
Now put the value in the second train's speed
x + 5
85 + 5
= 90 mph for train N
(brainly.com/question/12233662)
Answer:
Step-by-step explanation:
Red = r, blue = b,
Substitute:
- 9b = b + 288
- 8b = 288
- b = 288/8
- b = 26
Red marbles:
The <em>correct answer</em> is:
16√13.
Explanation:
The perimeter of a figure is found by adding together the lengths of all of the sides. The side lengths of this garden are: √13, √13, 7√13 and 7√13. This is because opposite sides in a rectangle are congruent.
Adding these together we have:
√13+√13+7√13+7√13 = (1+1+7+7)√13 = 16√13
First calculate what the coupon does for Camille
so multiply %20 by the cost or .2(47.99)=9.598 which rounds to 9.60 meaning she still paid $38.39
Then calculate sales tax by multiplying her clearance price by %6 and adding it on the cost
.06(38.39)= 2.3034 which rounds to $2.30 in tax.
Add that onto the clearance price 38.39+2.30=$40.69
So her total cost was $40.69
you do k12 too? what a small world
