he has a total of 42 quarters and one dime
Answer:
Q 19) x = 4; y = 8.
Q 20) x = 0 ; y = 0.
Q 21) x = -1; y = -5.
Step-by-step explanation:
Q 19)
y = 3x - 4 (Equation 1)
x - 4y = -28 (Equation 2)
Put Equation 2 in Equation 1:
x - 4(3x - 4) = -28.
x - 12x + 16 = -28
-11x = -44.
x = -44/-11.
x = 4.
Put x = 4 in Equation 1:
y = 3(4) - 4.
y = 12 - 4.
y = 8.
Q 20)
2x - 3y = 13x - 4y (Equation 1)
-3x - 2y = 0 (Equation 2).
From Equation 2:
-2y = 3x.
y = -3x/2 (Equation 3).
Put Equation 3 in Equation 1:
2x - 3(-3x/2) = 13x - 4(-3x/2).
2x + 4.5x = 13x + 6x.
12.5x = 0.
x = 0.
Put x = 0 in Equation 3:
y = 0.
Q 21)
y = 4x - 1 (Equation 1).
y = -2x - 7 (Equation 2).
Since y = y, therefore:
4x - 1 = -2x - 7.
6x = -6.
x = -1.
Put x = -1 in Equation 1:
y = 4(-1) - 1.
y = -4 - 1.
y = -5.
In short:
Q 19) x = 4; y = 8!!!
Q 20) x = 0 ; y = 0!!!
Q 21) x = -1; y = -5!!!
Answer:
B
Step-by-step explanation:
14p and 3p have the same variable
4(a + 2) + 9 = 5
to solve this problem lets solve this step by step
Step 1 - lets solve this part of problem 4(a + 2 )
by using distributive property we get,
4a + 8 + 9 = 5
Step 2 - adding the like terms
4a + 17 = 5
Step 3 - subtracting 17 from both sides
4a + 17 - 17 = 5 - 17
4a = -12
Step 4 - dividing both sides by 4
a = -3
So our final answer is a = -3
Hope this helps you :)
Answer:
It is $46 per video game because 92 divided by 2 is 46.
Step-by-step explanation: