Not sure its A but use this http://www.mathpapa.com/algebra-calculator.html
A= 280 b=280 c=120 d=120 i allredy did this it was so easy
Answer: The system will succeed when the first alarm rings or when the first one fails, but the second one rings. The probability of this is 0.98
The probability of system failure is 1-(probability of success)= 1-0.98= 0.02
Step-by-step explanation:
Answer:
The number of apples bought was 7 and the number of pears bought was 4
Step-by-step explanation:
<u><em>The correct question is</em></u>
Thanh bought 11 pieces of fruit and spent $5.60. If apples cost $0.60 each and pears cost $0.35 each, how many of each kind of fruit did he buy?
Let
x ---->the number of apples bought
y ----> the number of pears bought
we know that
Thanh bought 11 pieces of fruit
so
----> equation A
apples cost $0.60 each and pears cost $0.35 each and Thanh spent $5.60
so
----> equation B
Solve the system of equations by graphing
Remember that the solution is the intersection point both graphs
Using a graphing tool
The solution is the point (7,4)
see the attached figure
therefore
The number of apples bought was 7 and the number of pears bought was 4
Answer:
10.92
Step-by-step explanation:
turn the percent into a decimal, .28
.28×39=10.92