Answer:
B) -7
Step-by-step explanation:
since since since there is more of the negative number then the positive number, the positive number gets canceled out.
![3x^{2} +1=28](https://tex.z-dn.net/?f=3x%5E%7B2%7D%20%2B1%3D28)
Step 1 : subtract 1 from both sides
![3x^{2} =27](https://tex.z-dn.net/?f=3x%5E%7B2%7D%20%3D27)
Step 2 : Divide both sides by 3
![\frac{\frac{3x^{2} }{3} }{\frac{27}{3} }](https://tex.z-dn.net/?f=%5Cfrac%7B%5Cfrac%7B3x%5E%7B2%7D%20%7D%7B3%7D%20%7D%7B%5Cfrac%7B27%7D%7B3%7D%20%7D)
![x^{2} = 9](https://tex.z-dn.net/?f=x%5E%7B2%7D%20%3D%209)
Step 3 : Find the square root of 9
![\sqrt{9} = 3](https://tex.z-dn.net/?f=%5Csqrt%7B9%7D%20%3D%203)
x= (-3,3)
remember negative × negative = positive
Answer:
Lindsey, who is delivering her speech in a large auditorium
Step-by-step explanation:
Jin, who is delivering her speech to a small group sitting around a table
Lindsey, who is delivering her speech in a large auditorium
Luke, who is delivering his speech in a typical classroom
Jordan, who is delivering his speech in a small meeting room
Answer:16
Step-by-step explanation:
2/4 = 1/2
8+8=16
answer: she is right that y = 29, but step three should be addition property of equality.
work: let's see how she worked to isolate y. she started by subtracting 2y from both sides, so so far she is correct. after that, she added 84 to both sides, and again that is a correct step, but her proof is wrong, since you are adding and not subtracting 84, it's the addition property of equality. lastly, she divided 145 by and correctly got 29. so yes, she is correct.