Yes, the Property of Equality works for Multiplication
Answer:
C. In step 2, Cindy should have multiplied both sides of the equation by 2.
Step-by-step explanation:
I'll go through the equation correctly, and then point out what would have happened.
3 = x/2 - 5
Add 5 to both sides. -5 and 5 cancel out.
8 = x/2
What Cindy should have done here is multiply by 2, not divide by 2. It is important to remember that you do the INVERSE operation to cancel out a number.
What would have happened here is that we have an extra step (though either way we still end up with x being 16.)
Correct Step 2:
Multiply both sides by 2. x/2 and 2x cancel out.
x = 16
Incorrect Step 2:
8/2 = (x/2)/2
4 = x/4
Multiply both sides by 4 (this would be the extra step!).
16 = x
Answer:
B
Step-by-step explanation:
Trust me but don't mind this uzfhfzhzlxkxufxxigdho
Answer:
(x² - 3)(x² + 3)( + 9)
Step-by-step explanation:
- 81 ← is a difference of squares and factors in general as
a² - b² = (a - b)(a + b)
- 81
= ( )² - 9²
= ( - 9)( + 9) ← - 9 is also a difference of squares
= (x² - 3)(x² + 3)( + 9)
Step-by-step explanation:
x²y = k, where k is a real constant.
When x = 3.5, y = 8.
=> (3.5)²(8) = k, k = 98.
When y = 8/9,
we have x²(8/9) = (98).
=> x² = 110.25
=> x = 10.5 or x = -10.5.
Since we want the negative value,
the answer is x = -10.5.