Y=3x-10 and 3x+2y=16
y=3x-10
subsitute 3x-10 for y in other equation
3x+2y=16
3x+2(3x-10)=16
distribute
3x+6x-20=16
9x-20=16
add 20 both sides
9x=36
divide both sides by 9
x=4
sub back
y=3x-10
y=3(4)-10
y=12-10
y=2
x=4
y=2
(4,2) is soluiton
Answer:
0.00621
Step-by-step explanation:
We solve the above question using the
Z score formula. This is given as:
z = (x-μ)/σ/√n
where
x is the raw score = 12.20 or earlier
This means x ≤ 12.20
μ is the population mean = 13.20
σ is the population standard deviation = 2
n is the random number of samples = 25
z = 12.2 - 13.2/2/√25
z = -1/2/5
z = -1/0.4
z = -2.5
Probability value from Z-Table:
P(x≤ 12.2) = 0.0062097
Approximately = 0.00621
Therefore, the probability of randomly selecting a sample of 25 children who stood on their own by the average age of 12.2 months or earlier is 0.00621
Answer:
200
Step-by-step explanation:
200×4%=8
8×3=24
The original amount is $200
Answer:
5/6
Step-by-step explanation:
(2/3) / (4/5) = (2/3) * (5/4) Rock times roll, which means keep the first fraction the same ("rock"), change the division to "times", and "roll" the second fraction.
= (1/3) * (5/2) Simplify the 2 and the /4 since they are both even
= (1*5)/(2*3) Multiply the numerators together and the denominators together
= 5/6
Postive 4 because if u have -17 but you add +4 you get -13
