Answer:
The answer would be 20 mi
Step-by-step explanation:
a^2+b^2=c^2
a^2=144
b^2=256
C^2=400
Then you find the square root of ABC to find that C is 20
Answer:
-11
Step-by-step explanation:
-6y-5y=-11y/y=-11
C = children
a = adults
12c + 15a = 33456 (price)
c + a = 2450 (people)
c = 2450 - a (rewrite^)
12(2450 - a) + 15a = 33456 (substitute into the price equation)
29400 - 12a + 15a = 33456
3a = 4056
<u>a = 1352
</u>c = 2450 - (1352)
<u>c = 1098</u>
1098 children
1352 adults
Answer:
Step-by-step explanation:
-x + 5y - 7 = 0
-x + 5y = 7 --------------------(I)
4y - 10 = 5x
-10 = 5x - 4y
5x - 4y = -10 -----------------------(II)
-x + 5y = 7 --------------------(I)
5x - 4y = -10 -----------------------(II)
Multiply equation (I) by 5.
(I)*5 -5x + 25y = 35
(II) <u>5x - 4y = -10</u> {Now add and x will be eliminates}
21y = 25
y = 25/21
Substitute y value in Equation (I)
-x + 5*25/21 = 7
-x + 125/21 = 7
-x = 7 - (125/21)
-x = (147/21) - (125/21)
-x = (147-125)/21
-x = 22/21
x = -22/21
Answer:
Train 1
Step-by-step explanation:
Train 1 has constant speed: 240 miles / 3 hours = 80 mph.
Train 2 has constant speed: 490 miles / 7 hours = 70 mph.
So, Train 1 is faster.