2 would be the answer. Replace the x with the three and multiply that with the 2 and then subtract 4.
Answer:
r <5
Step-by-step explanation:
r-4<1
Add 4 to each side
r-4+4<1+4
r <5
Answer:
They sold 16 French fries.
Step-by-step explanation:
Let x represent the number of large burgers that they sold on that day.
Let y represent the number of French fries that they sold on that day.
fast food sells large burgers for five dollars each and french fries for three dollars each that day and their total sales was $98.It means that
5x + 3y = 98 - - - - - - - - - - - - - -1
they sold six more french fries than burgers. It means that
y = x + 6
Substituting y = x+ 6 into equation 1, it becomes
5x + 3(x + 6) = 98
5x + 3x + 18 = 98
8x = 98 - 18 = 80
x = 80/8 = 10
y = x + 6 = 10 + 6
y = 16
The answer is actually choice A
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If we add up the equations straight down we will have 0a+2b = 6
Note how adding the 'a' terms gives us 3a + (-3a) = 3a-3a = 0a. The 0a term is really 0 since 0 times anything is 0. So the 'a' terms will go away
The equation 0a+2b = 6 turns into 0+2b = 6 and that simplifies to 2b = 6
To isolate b, we divide both sides by 2
2b = 6
2b/2 = 6/2
b = 3
We can stop here since only one answer choice has b = 3, which is choice A. However, let's keep going to find the value of 'a'
Plug b = 3 into any equation with 'a' and 'b', then solve for 'a'
3a+4b = 9
3a+4*3 = 9
3a+12 = 9
3a+12-12 = 9-12
3a = -3
3a/3 = -3/3
a = -1
So a = -1 and b = 3 pair up to form (a,b) = (-1,3)
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To check, plug this ordered pair back into both equations
Equation 1:
3a+4b = 9
3*(-1)+4*3 = 9
-3+12 = 9
9 = 9
Equation 1 has been checked out
Equation 2:
-3a-2b = -3
-3(-1)-2(3) = -3
3 - 6 = -3
-3 = -3
this is true as well
So this confirms that the final answer is choice A
The sum of the real numbers x and y is 11. Their difference is 5. what is the value of xy? Y=3
