Answer:
Option A. The cost of one pack of ballpoint pens is $3 and the cost of one pack of gel pens is $7.
Step-by-step explanation:
Let
x -----> the cost of one pack of ballpoint pens
y -----> the cost of one pack of gel pens
we know that
60x+25y=355 -----> equation A
120x+30y=570 -----> equation B
Solve the system of equations by graphing
Remember that the solution of the system is the intersection point both graphs
The solution is the point (3,7)
see the attached figure
therefore
The cost of one pack of ballpoint pens is $3
The cost of one pack of gel pens is $7
Answer:
The least common multiple = 12x
Step-by-step explanation:
The given expression is,
(2+1)/3 + (x-3)/4 = 1/6x
<u>To find the least common multiple</u>
To eliminate the denominator we have to multiply each term by LCM of denominators.
Here, the denominators are, 3, 4 and 6x
LCM ( 3, 4, 6x) = 12x
Therefore the least common multiple in which eliminate the denominator is 12x
Answer:
Ajoba: 28.8km/h
Prav: 59.2km/h
The difference in speed is: 59.2-28.8=30.4km/h
Step-by-step explanation:
Ajoba:
d=45mi Convert to km //
t=2.5h
v=? 28.8km/h
Prav:
d=74km
t=1h15m or 1.25h
v=? 59.2km/h
Solve for v;
--------------------------------------------
Answer:
(5 - 7)^2.
Step-by-step explanation:
(g o h) = (x - 7)^2
so (g o h)(5) = (5 - 7)^2.
Answer:
C
Step-by-step explanation:
Longest practice is 2 1/2 hours long
Shortest is 1 1/4 hours long
For difference, subtract 1 1/4 from 2 1/2
Convert mixed to improper fractions
(2*2+1)/2 - (1*4+1)/4
5/2 - 5/4
10/4 - 5/4 = 5/4
Change back to mixed fraction
1 1/4