Answer:
ok
Step-by-step explanation:
Factor the equation into...
(3b+5)(3b+5)=0
Each factor 3b+5=0 so 3b=-5 so b=-5/3
Check:
9(-5/3)^2+30(-5/3)+25=
9(25/9)-50+25=
25-50+25=0
It checks,
So answer is A.-5/3
Answer:
92
Step-by-step explanation:
The two angles form a straight line , which is 180 degrees
x+88 = 180
Subtract 88 from each side
x+88-88=180-88
x =92
Answer:
Step-by-step explanation:
Let the amount of the job is x.
You can do 1/2x in an hour.
Your friend can do 1/3x in an hour.
<u>Together you can do:</u>
- 1/2x + 1/3x = 5/6x of a job in an hour
<u>You need time to finish the job:</u>
- x ÷ 5/6x = 6/5 = 1.2 hours
Answer:
t = $23
s= $47
Step-by-step explanation:
First order =
13t + 4s = 487
Second order
6t + 2s = 232
13t + 4s = 487 (1)
6t + 2s = 232 (2)
Multiply (2) by 2
12t + 4s = 464 (2b)
13t + 4s = 487
12t + 4s = 464
Subtract
12t - 10t = 487 - 464
t = $23
Substitute t = 23
13t + 4s = 487
13(23) + 4s = 487
299 + 4s = 487
4s = 487 -299
4s = 188
s = 188 / 4
= 47
s= $47