Answer:
x=√65 and x=-√65
Step-by-step explanation:
Givn the expression 2x^2 - 9 = 121
Add 9 to both sides
2x^2 - 9 + 9 = 121 + 9
2x^2 = 130
Divide both sides b 2
2x^2/2 = 130/2
x^2 = 65
x = ±√65
x=√65 and x=-√65
Plug in 3 for x and 30 for y
5(3 + 8) + 3 + 30
Use PEMDAS
5(11) + 3 + 30
55 + 33
88
88 is your answer
hope this helps
12.5%, every 500 years you take away half of the substance (50%) -> 25% -> 12.5%
you divide your number 3 times because 1500/500=3
Answer:
0.90
Step-by-step explanation:
Hope this Helps!!
Answer: X= 6-4^z/2
Step-by-step explanation: first you need to get rid of the 4. You subtract it from both sides. So now
2x=6-4 to the power of z
So now you need to get rid of the 2. You divide both sides by two. Then you get
X= 6-4^z/2