Answer:
3, 7, & 10, took this test earlier.
Use first differences. You are subtracting. Difference = Subtracting.
9 - x = 4
4 - x = -1
-1 - x = -6
Find for x.
9 - x = 4
- x = 5
x = -5
Therefore the answer is B.
Proof:
9 - 5 = 4
4 - 5 = -1
-1 - 5 = -6
Answer:
C
Step-by-step explanation:
Law = 99 sq.
L = 2w + 7
---
Law = 99
(2w + 7)w = 99
2ww + 7w = 99
2ww + 7w - 99 = 0
---
the above quadratic equation is in standard form, with a=2, b=7, and c=-99
---
to solve the quadratic equation, plug this:
2 7 -99
the roots of the quadratic are:
-9
5.5
---
the negative root doesn't make sense as a length, so use the positive root:
---
w = 5.5
L = 18
---
Answer:
exact form: x
=
√
17
+
9
,
−
√
17
+
9
decimal form: 13.12310562
Step-by-step explanation:
Add 43 to both sides of the equation. Add − 9 and 43
.Divide each term by 2. Then simplify it. Take the square root of each side to set up the solution for x. The solution is the result of both the positive and negative portions of the solution.
Hope this helps!