Answer: after 3 seconds
when the ball hit the ground => - 5t² + 14t + 3 = 0
⇔ (5t + 1)(t - 3) = 0
⇔ t = 3 or t = -1/5
but t is a positive integer => t = 3
so the ball will hit the ground after 3 seconds
Step-by-step explanation:
Answer:
Step-by-step explanation:
6x - 17 = 3x + 7
3x = 24
x = 8
Answer: 100
<u>Step-by-step explanation:</u>
[(25 - 11) + (15 - 9)] * 5
=[ 14 + 6 ] * 5
= 20 * 5
= 100
Answer:
12) 
11) 
10) 
9) 
8) 
7) 
6) 
5) 
4) 
3) 
2) 
1) 
Step-by-step explanation:
12)
y - 4 = −(x - 4)
y - 4 = −x + 4
+ 4 + 4
__________

_______________________________________________
11)
y + 2 = 12(x + 2)
y + 2 = 12x + 24
- 2 - 2
____________

_______________________________________________
10)
y - 1 = 5(x - 1)
y - 1 = 5x - 5
+ 1 + 1
_________

_______________________________________________
9)
y - 5 = −2(x + 2)
y - 5 = −2x - 4
+ 5 + 5
___________

_______________________________________________
8)
y - 5 = 2(x + 2)
y - 5 = 2x + 4
+ 5 + 5
__________

_______________________________________________
7)
y + 4 = 12(x - 2)
y + 4 = 12x - 24
- 4 - 4
____________

_______________________________________________
6)
4x - 3y = −6
-4x - 4x
__________
−3y = −4x - 6
___ _____
−3 −3

_______________________________________________
5)
4x - y = 2
-4x - 4x
_______
−y = −4x + 2

_______________________________________________
4)
x - y = 0
______
−y = −x

_______________________________________________
3)
7x - 5y = 35
-7x - 7x
_________
−5y = −7x + 35
___ ______
−5 −5

_______________________________________________
2)
2x - y = 4
-2x - 2x
_______
−y = −2x + 4

_______________________________________________
1)
2x - 3y = 24
-2x - 2x
_________
−3y = −2x + 24
___ _______
−3 −3

I am delighted to assist you anytime.
I'm pretty sure your answer would be A