Answer:
x = 4, y = -4
Step-by-step explanation:
9x + 3y = 24
3x + y = 8 divide both sides by 3
y = 8 - 3x subtract 3x from both sides
2y + 4x = 8
2(8 - 3x) + 4x = 8 replace y with 8 - 3x
16 - 6x + 4x = 8 distributive property
-6x + 4x = 8 - 16 subtract 16 from both sides
-2x = -8 divide both sides by -2
x = 4
y = 8 - 3x
y = 8 - 3(4) replace x with 4
y = 8 - 12
y = -4
You can simplify the fraction to get 2/5. If you convert this into a decimal you will get 0.4, so D is your answer.
Step-by-step explanation:
The answer is - 4
Because when you solve it
x2 - 16 = 0
x2 = 16
So we will square root it
x = - 4
One more thing don't you have the option x = 4
Hi there
The price before discount is
P=3÷0.15
p=20
Hope it helps
