The given expression is
Let's replace x = 7 and y = -2.
<h2>Therefore, the value of the expression is 20.</h2>
Answer:
x = 12
General Formulas and Concepts:
<u>Pre-Algebra</u>
- Order of Operations: BPEMDAS
- Equality Properties
Step-by-step explanation:
<u>Step 1: Define equation</u>
-2(x - 4) = -16
<u>Step 2: Solve for </u><em><u>x</u></em>
- Distribute -2: -2x + 8 = -16
- Isolate <em>x</em> term: -2x = -24
- Isolate <em>x</em>: x = 12
<u>Step 3: Check</u>
<em>Plug in x to verify it's a solution.</em>
- Substitute: -2(12 - 4) = -16
- Subtract: -2(8) = -16
- Multiply: -16 = -16
Here we see that -16 does indeed equal -16.
∴ x = 12 is a solution of the equation.
Answer:
-45
Step-by-step explanation:
PEMDAS
First, parenthesis:
4 + 21 = 25
1 - 71 = 7
Then Subtraction:
25 - 70 = -45
Answer: 45z + 11
Explanation:
-9(-5z - 2) - 7
= 45z + 18 - 7
= 45z + 11
y = -5x + 1
[y = mx + b "m" is the slope, "b" is the y-intercept (the y value when x = 0)]
So your slope is -5, and your y-intercept is 1 or (0,1)
Rise is the number of units you go up(+) or down(-).
Run is the number of units you go to the right.
Since your slope is -5 or 
, you go down 5 units, and to the right 1 unit.
