Answer:
x-intercept(s):
(
−
3
+
√
17
/4
,
0
)
,
(
−
3
−
√
17
/4
,
0
)
y-intercept(s): (
0
,
1
)
Vertex= (
−
3
/4
,
17/
8
)
Increasing on: (
−
∞
,
−
3
/4
)
Decreasing on: (
−
3/
4
,
∞
)
Its negative
Step-by-step explanation:
Let us denote the years of Mary with M and the years that Al have with A.
<span>We know that the sum of Mary and Al's age is 48. So, we can write:
M+A=48 (1)
</span><span>We also know that twelve years ago, Mary was twice as old as Al.
So we can write:
M-12=2*A (2)
From the first equation (1): M=48-A
Let put this in the second equation:
48-A-12=2A
36=3A
A=12
M=48-12=36
</span>
Now, a whole, will be 15/15 or 1 whole.
now, the sprinkler does 1/15 of the lawn in 1/3 of an hour, how long will it be to do the whole 15/15?
Step-by-step explanation:
7c-7+6c-8=180°
13c-15=180°
13c=180+15
13c=195
c=15
Answer:
20 i think
Step-by-step explanation:
