Answer:
2 real roots
Step-by-step explanation:
The discriminant is b^2 -4ac where ax^2 +bx -c
If b^2 -4ac > 0 we have 2 real roots
b^2 -4ac = 0 we have 1 real root
b^2 -4ac < 0 we have 2 complex roots
x²-x-12=0
a =1 b=-1 c = -12
(-1)^2 - 4(1)*(-12)
1 +48
49 > 0
2 real roots
Answer:
1.) 40 mph
2.) $160 per month
3.) 2 goals per game
4.) $0.20 per ounce
5.) 1/4 mile or 0.25 mile per minute
6.) 8 tickets per minute
7.) $1.25 per Euro
8.) 25 miles per hour
9.) 2 flies per minute
10.) 3 problems per minute
11.) 15 barks per minute and 900 barks per hour
12.) 2 pages per minute
13.) 12/11 patients per hour
14.) $5 per car
15.) 7 cars per minute
16.) $2.50 per soft drink
17.) 3/4 points or 0.75 points per minute
18.) 8.5 minutes per mile
19.) 25 cents per ounce
20.) $9 per hour
Step-by-step explanation:
1.) 160/4 = 40
2.) 480/3 = 160
3.) 8/4 = 2
4.) 2.80/14 = .20
5.) 5/20 = 1/4 or .25
6.) 96/12 = 8
7.) 25/20 = 5/4 or 1.25
8.) 375/15 = 25
9.) 8/4 = 2
10.) 24/8 = 3
11.) 30/2 = 15
There are 60 minutes in an hour, so 15 x 60 = 900
12.) 40/20 = 2
13.) 6 / (11/2)
You'll want to turn 11/2 hours into one hour, so multiply 11/2 by its reciprocal, which is 2/11. Multiply 6 by 2/11 as well.
(12/11) patients per hour
14.) 25/5 = 5
15.) 35/5 = 7
16.) 12.50/5 = 2.50
17.) 9/12 = 3/4 or .75
18.) 34/4 = 17/2 or 8.5
19.) 4/16 = 1/4 or $0.25 which is 25 cents
20.) 36/4 = 9
Is there any other information?
Is these 41/2,2/3,1/4,1/2,21/3 The first thing, calculate m.c.m of these denominator
2=2
3=3
4=2.2
12
246/12,8/12,3/12,3/12,6/12,84/12, In order is like this
246/12,84/12,8/12,6/12,3/12
41/2>21/3>2/3>1/2>1/4 0r
1/4<1/2<2/3<21/3<41/2
Answer:
5
Step-by-step explanation:
- (4n+5)-n/20=1
- cross multiply:(4n+5)-n=20
- 4n+5=20+n
- 4n-n=20-5
- 3n=15
- Divide both sides by coefficient of n
- n=5