Answer:
B. Subtract 7
Step-by-step explanation:
You always want to isolate the <em>x</em> term to solve for <em>x</em> in any equation. Therefore, we need to move the 7 to the other side. Only way to do that is to subtract 7 on both sides.
Answer:
C ≈-1 and x≈8.1
Step-by-step explanation:
-sqrt(x + 2) - 3 = 4 - 2 abs(x - 3)
Using graphing technology, (see the graph) they intersect at x≈-1 and x≈8.1
For this case we have the following equation:
S = 0.159 + 0.118logD
Substituting S = 0.2 we have:
0.2 = 0.159 + 0.118logD
From here, we clear the value of D.
We have then:
0.2 - 0.159 = 0.118logD
logD = (0.2 - 0.159) / (0.118)
logD = 0.347457627
10 ^ (logD) = 10 ^ 0.347457627
D = 10 ^ (0.347457627)
D = 2.23 mm
Answer:
The average diameter, D, of the sand particles for a beach is:
D = 2.23 mm
<span>3x − 2y = 6 (1)
6x − 4y = 12 (2)
divide equation (2) by 2
3x - 2y = 6
equation (2) is same as equation 1
so answer is </span>infinitely many solutions