9x-6-13x=94
-4x-6=94
-4x=100
x= -25
If then
If then first 300 minutes are free and each minute of next (x-300) minutes costs $0.39, therefore the answer is B :)
Answer:
His balance will be $340.
Step-by-step explanation:
1.) 360-45=315
- You do this because when you make a withdrawal you are removing a specific amount of money from your account. In this example you are making a withdrawal (removing) of $45 from your account of $360.
2.) 315+25=340
- You did this because a deposit is a specific amount of money you are adding. In this example you are depositing (adding) $25 to your new total of $315.
Answer:
B. One solution
Step-by-step explanation:
Here are a system of how two equations can be classified ;
• If the gradients are the same but the y-intercepts are different, the system has no solution.
• If the gradients are different, the system has one solution.
• If the gradients are the same and the y-intercepts are the same, the system has infinitely many solutions.
Y= (x/4) + 3
When x =1
y= 13/4
When x=3
y= 15/4
Gradient of Y= (x/4) + 3
=∆y/∆x
= (15/4 - 13/4)/ ( 3-1)
=( 2/4)÷ 2
=( 2/4 ) × (1/2)
= 1/4
-4x + y = 4
When x= 1
Y= 8
When x=3
Y=16
Gradient of -4x + y = 4
=∆y/∆x
= (16 - 8)/(3-1)= 8/2 = 4
Since the gradients are different then the system has one solution.
