X + y = 12 . . . . . . . . (1)
x - 3y = -30 . . . . . . . (2)
(1) - (2): 4y = 42
y = 10.5
Answer:
3![\sqrt{6}](https://tex.z-dn.net/?f=%5Csqrt%7B6%7D)
Step-by-step explanation:
using the rule of radicals
×
⇔ ![\sqrt{ab}](https://tex.z-dn.net/?f=%5Csqrt%7Bab%7D)
![\sqrt{54}](https://tex.z-dn.net/?f=%5Csqrt%7B54%7D)
=
=
×
= 3![\sqrt{6}](https://tex.z-dn.net/?f=%5Csqrt%7B6%7D)
Answer:
Step-by-step explanation:
add 9 to both sides.
then divide by 1.5
so p > 8
number your number line: 2,4,6,8,10
draw a circle at 8 and the line to the right since p>8
You divide -15 on both sides to keep the x alone
-240/ -15=16
A negative divided by a negative is a positive so x=16