48 feet of wood
12x12= 144 square feet
12x4 (for the perimeter)
48
-3x + 7 = -1
-3x = -8
x = 8/3
In order to solve for x, you must isolate the variable. Because -1 and 7 are like terms, use inverse operations to subtract 7 from both sides. Then, divide both sides by -3. This should get you x = 8/3, which can’t be reduced any more (unless you convert to decimal, which is about 2.666666…) Feel free to comment any questions you have! Always happy to help :)
I believe your answer is 132
Answer:
1. x = ±9
2. 
3. 12 and -12.
4. Antoine is incorrect. There exists two solutions x=5 and x= -5.
Step-by-step explanation:
We have,
Question 1.
i.e.
i.e. x = ±9.
Question 2.
i.e.
i.e.
i.e. 
Question 3. [tex]f(x)=x^{2}-144[tex]
For the roots, we take, [tex]x^{2}-144=0[tex] i.e. [tex]x^{2}=144[tex] i.e. x = ±12.
So, the options are 12 and -12.
Question 4. We have [tex]f(x)=x^{2}+25[tex]
For the roots, we take, [tex]x^{2}+25=0[tex] i.e. [tex]x^{2}=25[tex] i.e. x = ±5.
So, Antoine is incorrect. There exists two solutions x=5 and x= -5.
Answer:
D. 74
Step-by-step explanation:
plug in 72 into the equation