Answer:
4a plus or minus 1b
Step-by-step explanation:
Answer:
Step-by-step explanation:
Multiplying decimals is not as hard as you think :)
Example 1:
Multiply: 5.2 x 4.5
Step #1: Line up the decimals
Step #2: Multiply like you usually would when multiplying two numbers.
Step #3: Move your decimal twice to the left to get 23.40
Work:
5.2
<u>x 4.5</u>
260
<u>+ 2080</u>
23.40 (I moved the decimal twice to the left from the zero)
Answer:
y = 2x + 8
Step-by-step explanation:
Find the slope of a line between (-8,-8) and (-9,-10) using m = 
, which is the change in y over the change in x.
Substitute in the values of x and y into the equation to find slope.
Simplify.
Simplify the numerator.
Multiply -1 by -8
Add -10 and 8
Simplify the denominator.
Multiply -1 by -8
Add -9 and 8.
Divide -2 by -1.
Using the point slope form 
plug in m = 2, 
Solve for y.
Multiply -1 by -8
y
+
8
=
(
2
)
(
x
−
(
−
8
)
)
Simplify (
2
)
(
x
−
(
−
8
)
)
.
Multiply −
1 by −
8
y+8
=
2
(
x
+
8
)
Apply the distributive property.
y
+
8
=
2
x
+
2
⋅
8
Multiply 2 by 8
.
y
+
8
=
2x
+
16
Move all terms not containing y to the right side of the equation.
Subtract 8 from both sides of the equation.
y
=
2
x
+
16
−
8
Subtract 8 from 16
.
y
=
2
x
+
8
The answer is: " (x − 8) (x + 3) " .
__________________________________________________________
" (x − 8) (x + 3) " are the factors of: " x² − 5x − 24 " .
_________________________________________________________
Explanation:
__________________________________________________________
Given: "x² − 5x − 24 " ; Factor this "trinomial" expression completely.
We notice the "-5x" and the "-24 .
What factors of "-24" add up to "-5" ?
-1 + 24 ? No.
-24 + 1 ? no.
-12 + 2 = -10? No.
12 + (-2) = 12 - 2 = 10 ? No.
-3 + 8 = 5 ? No.
-8 + 3 = -5 ? Yes!
So: " (x − 8) (x + 3) " are the factors of: " x² − 5x <span>− 24 " .
______________________________________________________ </span>
Yes...the person's hypothesis could be correct.
