30%*470=141 (So the number of students in 8 grade is 141)
Add the 2x values and divide by two, then add the 2y values and divide by 2
answer is (-2,½).
Answer: -18 - -18
Step-by-step explanation: Aka negative eighteen minus negative eighteen
Answer:
Step-by-step explanation:
Let the speed of the car be "X". From 3 am until 1 pm (10 hours), the car will travel 10*X miles.
The speed of the airplane is (X +200). From 11 am until 1 pm (2 hours), the plane will travel 2*(X+200).
The distance travelled is the same, so:
10*X = 2*(x+200)= 2x+400
Subtract 2*X from both sides:
8*X = 400
X = 400/8 = 50 mph.
$42 is the answer because 10% of 210 is 21 multiply that by 2
