The answer is 15 uniforms bought
Answer:
A. –x – 6y = 42
Step-by-step explanation:
Multiply everything by 6:
6y = x + 42
The answer you are looking for is -6y+x=-42
We start by multiplying everything by 6
·6y=X+42
We then need to move X to the other side of the equation so we subtract X rom both sides.
·6Y-X=42
In order to solve the question X must be positive so we multiply everything by a quanitity of -1
·-6y+x=-42
Now this is in stardard form, so in conclusion your answer is -6y +x = -42
-I hope this is the answer you are looking for, feel free to post your questions here on brainly in the future.
The standard form of a straight line equation is: Ax%2BBy%2BC=0
.
In your example, we would write:
x-y%2B6=0
Write in standard form.
x
−
6
y
=
−
42
Answer:
a) X ~
b) μ = 100/3
c)
d) A battery is expected to last 100/3 months (33 months and 10 days approximately).
e) For seven batteries, i would expect them to last 700/3 months (approximately 19 years, 5 months and 10 days).
Step-by-step explanation:
a) The life of a battery is usually modeled with an exponential distribution X ~
b) The mean of X is μ = 1/0.03 = 100/3
c) The standard deviation is
d) The expected value of the bateery life is equal to its mean, hence it is 100/3 months.
e) The expected value of 7 (independent) batteries is the sum of the expected values of each one, hence it is 7*100/3 = 700/3 months.
Since b is the midpoint BC is half the line so we can set up this equation
x+4+X+4=3x-8
and then solve like normal
2x+8=3x-8
16=x
once you have x then solve x+4
16 + 4 =20
AB is 20