Part A: Charlie's answer is incorrect
In step 2 of Charlie's answer he subtracted 5 from each side. Since 5x is multiplication, he must DIVIDE each side by 5 to get x by itself. The problem should have worked out like this...
Step 1: 5x = 30
Step 2: x = 30/5
Step 3: x = 6
Part B: There is only 1 solution for this problem.
Answer:
Length = 5
Width = 21
Step-by-step explanation:
(x)(x + 16) = 105
x^2 + 16x = 105
x^2 + 16x - 105 = 0
(x - 5) x ( x + 21) = 0
x - 10 = 0
x = 5
x + 21 = 0
x = -21
Now that we have the zeroes.
We have to find the most viable one to put in.
Using -21 would not make sense, so we will use 5.
Plug it in:
x = 5
(5) (5 + 16) = 105
5 ( 21) = 105
René Descartes was the person who created analytic geometry and the Cartesian coordinate system
Answer:
make y the subject first
Step-by-step explanation:
y=x/2 +3
parallel lines have equal gradient m1=m2
y-y1=m(x-x1)
y-4=1/2(x-(-1))
y=1/2(x) +1/2+4
final answer
y=1/2(x) +9/2
To find that, just multiply 5x3 and your answer will be 15 :))
