After 5 seconds the rock should be 425 feet in the air.Workings are in the attachments below. Please read carefully.
Answer:
Step-by-step explanation:
lol
Answer:
B. 14
Step-by-step explanation:
When reading a stem and leaf plot, the outside numbers represent the tens and the inside numbers represent the units.
For example, take 5 | 4.
5 is the ten and 4 is the unit, making it 54.
If you understand that, then I think you'll understand how I got my answer.
Answer:
1.49
Step-by-step explanation:

in this problem you also need to use scientific notation period to do scientific notation you need to go to the first non-zero digit after the decimal . and in this case that is one next thing you do is put the next numbers after the decimal that you just put in front of the one which is 49 in this case and that gives you your answer of 1.49
Answer:
(1) C
(2) D
(3) B
(4) B
(5) C
Step-by-step explanation:
(1) % decrease = change in price/initial price × 100 = (25 -20)/25 × 100 = 5/25 × 100 = 20
(2) Number of correct answers he answered in the second test = 150 + (30/100 × 150) = 150 + 45 = 195
(3) Let the number be y
3(y + 2) = 24
y + 2 = 24/3 = 8
y + 2 = 8
y = 8 - 2 = 6
(4) Let my father's age be f, my brother's age be b and my age be m
From the first statement
f/5 = b/3 ----- eqn (1)
From the second statement
b = m + 3 ----- eqn (2)
From the third statement
f = 2m - 3 ------ eqn (3)
Substitute the expression of b and f in eqn 2 & 3 into eqn 1
(2m - 3)/5 = (m + 3)/3
3(2m - 3) = 5(m + 3)
6m - 9 = 5m + 15
6m - 5m = 15 + 9
m = 24
Substitute the value of m into eqn 3
f = 2m - 3 = 2(24) - 3 = 48 - 3 = 45
(5) (x - 2)/4 - (3x + 5)/7 = -3
The LCM of 4 and 7 is 28
Multiply each term in the equation by 28
7(x - 2) -4(3x + 5) = -3(28)
7x - 14 - 12x - 20 = -84
-5x - 34 = -84
-5x = -84 + 34
-5x = -50
x = -50/-5 = 10