Answer:
I dont know the answers but here is an example( look at screenshots)
Step-by-step explanation:
Answer:
22 seconds
Step-by-step explanation:
The maximum height is at the vertex of the parabola.
For a parabola y = ax² + bx + c, the vertex is at x = -b/(2a).
Here, a = -16 and b = 704.
t = -704 / (2 × -16)
t = 22
It takes 22 seconds for the projectile to reach its maximum height.
Xy = 45
(x+y)/2=7
---------
x+y = 14
Ah. So we can simplify the problem to, 'the product of two numbers is 45 and their sum is 14'. This shouldn't too hard to guess: the numbers are 5 and 9
Answer:
42 : 28
Step-by-step explanation:
Sum the parts of the ratio , 3 + 2 = 5
Divide 70 by 5 to find the value of one part of the ratio
70 ÷ 5 = 14 ← value of 1 part of ratio, thus
3 parts = 3 × 14 = 42
2 parts = 2 × 14 = 28
70 divided in the ratio 3 : 2 is 42 : 28