Answer:
y=4
Step-by-step explanation:
7.9y-2-3.2y-10=2.8+y
group like variables
4.7y -12 = 2.8 +y
isolate the variable (y)
3.7y = 14.8
solve for y through division
14.8/3.7=y
4=y
9514 1404 393
Answer:
1 (dollar per subscription)
Step-by-step explanation:
a) The term "rate of change" refers to "slope" or "unit rate" on a graph. In a linear equation, it is the coefficient of the variable.
On the graph, it can be found by counting the vertical units that correspond to each horizontal unit. On this graph, a horizontal increase of 1 grid square (5 subscriptions) causes an increase of 1 grid square ($5) in earnings. The rate of change is ...
m = rise/run = $5/(5 subscriptions) = $1 per subscription
__
c) As indicated above, this will translate to the coefficient of the variable in the equation.
E = n + 45
(-p + 2) * 8 + 10
Distribute 8 inside the parentheses.
-8p + 16 + 10
Combine like terms.
-8p + 26
Answer:
it is
Step-by-step explanation:
The number of moles will be simply the number of molecules divided by Avogadro's number, so
3.01
×
10
23
6.02
×
10
23
=
0.5
m
o
l
Since the molar mass of
C
O
2
is
44
g
m
o
l
−
1
, the mass of
C
O
2
will be
22
g
.
Answer:
The mean is usual
Step-by-step explanation:
We have that the mean (m) is equal to 21, the standard deviation (sd) = 1.31 and the sample size (n) = 64
They ask us for P (x <20.5)
For this, the first thing is to calculate z, which is given by the following equation:
z = (x - m) / (sd / (n ^ 1/2))
We have all these values, replacing we have:
z = (20.5 - 21) / (1.31 / (64 ^ 1/2))
z = -3.05
With the normal distribution table (attached), we have that at that value, the probability is:
P (z <-3.05) = 0.0002
The mean is usual because P (x> 20.5) = 1 - P (x <20.5) = 1 - 0.0002 = 0.9998 is a fairly high probability.
