Answer:
<h2>After two seconds, the ball reached 9 units up.</h2>
Step-by-step explanation:
The given function is

The given function models the path of the ball.
The maxium height the ball reached is given by the vertex of this function, which has coordinates
, where
and
.
From the equation, we know that
,
and
. Replacing these values, we have


Where
determines the height and
the time when the maximum height was reached by the ball.
The maximum height is 9 units.
Therefore, after two seconds, the ball reached 9 units up.
Answer:
Step-by-step explanation:
9.65+0.4=10.05
16.058-1.2=14.858
Answer:
18
Step-by-step explanation:
Answer:
3) yes, it is in the shaded region
4) no, it lies on a less-than line
5) yes, it lies on a greater-than-or-equal-to line
6) no, it isnt in the shaded region
Step-by-step explanation:
Answer:
John’s age is 8 years
Step-by-step explanation:
Let
x -----> John’s father's age
y -----> John’s age
z -----> John’s sister's age
we know that
-----> equation A
-----> equation B


-----> equation C
Substitute equation A and equation B in equation C and solve for y

Multiply by 2 both sides to remove the fraction



<em>Find the value of x</em>
<em>Find the value of z</em>

therefore
John’s father's age is 40 years
John’s age is 8 years
John’s sister's age is 4 years