Write a system of equations and solve.
x + y = 10
5x + 10y = 90
Multiply and combine equations
-5x - 5y = -50
5x + 10y = 90
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5y = 40
y = 8
x = 2
There are 2 nickels and 8 dimes in the jar. Hope this helps! :)
Answer:
try the app called photo math it works realy well!
Step-by-step explanation:
Answer:
Speed = distance/time
First 2km:
time = distance/speed
time = (2km) / (12km/hour) = 1/6 hours
Time remaining to get to 1 hour = 1-(1/6) = 5/6 hours
Distance remaining to finish the race = 10km-2km = 8km
speed = 8km/(5/6 hours) = (8*6)/5 = 9.6 km/h
Maintain an average speed of 9.6 km/h
Step-by-step explanation:
Answer:
69 purple cookies!
Step-by-step explanation:
Answer:
It is equivalent to 15x – 3)(2x + 1) = 0. False
It is equivalent to (5x – 3)(2x + 1) = 0 True
Either x=-1/2 or 5/3
Step-by-step explanation:
Consider the equation 5x (2x + 1) - 3(2x + 1) = 0.
It is equivalent to 15x – 3)(2x + 1) = 0. False
It is equivalent to (5x – 3)(2x + 1) = 0 True
When you take pull-out (2x+1), you will be left with (5x-3)
5x (2x + 1) - 3(2x + 1) = 0.
(2x+1)(5x-3)=0
Either 2x + 1 = 0
2x = -1
Divide both-side of the equation by 2
2x/2 = -1/2
x= -1/2
OR
5x-3 =0
5x = 3
Divide both-side of the equation by 5
5x/5 = 3/5
x = 5/3
Either x=-1/2 or 5/3
