Answer:
Jennifer has 7 quarters
Step-by-step explanation:
<u><em>The correct question is</em></u>
Jennifer has $ 3.51 in change in her piggy bank. The change consists of 51 coins inducing pennies, nickels and quarters. If there are 3 times as many nickels as pennies, how many quarters does she have?
Remember that
Let
x ----> the number of pennies
y ---> the number of nickels
z ---> the number of quarters
we know that
-----> equation A
----> equation B
---> equation C
substitute equation C in equation A and equation B
-----> equation D
----> equation E
we have
-----> equation D
----> equation E
Solve the system of equations D and E by graphing
Remember that the solution is the intersection point both graphs
The solution is the point (11,7)
x=11,z=7
see the attached figure
Find the value of y
so
The number of pennies is 11
The number of nickels is 33
The number of quarters is 7
Hello!
As you can see, the angles we are given are supplementary. In other words, their sum is 180°. We can just subtract 86 and get the value of the other.
180-86=94
Therefore, ?=94°
I hope this helps!
Answer: 1 hour 15min
Step-by-step explanation:
When Paul passes the gas station Mary si already 12.5 miles away
X=v t = 50mph 0.25h = 12.5 miles. (15min equals a quarter hour)
From that moment to the meeting point we’ll have only one t (time) and one x (final point) for both cars
For Mary we have
X= Xo + v t= 12.5 miles + 50mph t
For Paul we have
X=v t = 60mph t
As x si the same in both equations
60mph t = 12.5 miles + 50mph t
(60mph - 50mph) t = 12.5miles
10mph t = 12.5miles
t = 12.5miles/10mph
t = 1,25 h
Answer:
what?
Step-by-step explanation:
B,D,F / I’m pretty sure I did this not to long ago
