Answer:
Option A is the correct answer.
Step-by-step explanation:
Here we need to factorize x²+3x−18
The coefficient of x is 3 and the constant is -18
Which means
The sum of factors is 3
The product of factors is -18
The factors satisfying are 6 and -3
Here the factors are given in the type (x+)(x−)
So the value after plus is 6 and value after - is 3
Option A is the correct answer.
Answer:
m= 655.75
Step-by-step explanation:
m=15.75+32d
m=15.75+32x20
m=15.75+640
m= 655.75
Answer:
volume in cubic centimeters = 30 cm³
Step-by-step explanation:
Ratio of mass to volume = 27 g : 10 cm³
what is the volume in cubic centimeters of the sample of metal if mass = 81 g
Let
volume in cubic centimeters = v
Ratio of mass to volume = 81 g : v
Equate both ratios
27 g : 10 cm³ = 81 g : v
27/10 = 81/v
Cross product
27 * v = 10 * 81
27v = 810
v = 810/27
v = 30 cm³
volume in cubic centimeters = 30 cm³
Answer:
Probability that a car need to be repaired once = 20% = 0.20
Probability that a car need to be repaired twice = 8% = 0.08
Probability that a car need to be repaired three or more = 2% = 0.02
a) If you own two cars what is the probability that neither will need repair?
Probability that a car need to be repaired once , twice and thrice or more= 0.20+0.08+0.02=0.3
Probability that car need no repair = 1-0.3=0.7
Neither car will need repair=
b) both will need repair?
Probability both will need repair = 
c)at least one car will need repair
Neither car will need repair=
Probability that at least one car will need repair= 1-0.49 = 0.51
