2 answers:
Answer:
a. f(4) = 29
b. f(-2) = -25
c. x = 8
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<u>Algebra I</u>
Equality Properties
- Multiplication Property of Equality
- Division Property of Equality
- Addition Property of Equality
- Subtraction Property of Equality
Terms/Coefficients
Functions
Step-by-step explanation:
<u><em>Part A + B</em></u>
<u>Step 1: Define</u>
<em>Identify.</em>
f(x) = 9x - 7
<u>Step 2: Find</u>
<em>f(4)</em>
- Substitute in <em>x</em> [Function f(x)]: f(4) = 9(4) - 7
- [Order of Operations] Evaluate: f(4) = 29
<em>f(-2)</em>
- Substitute in <em>x</em> [Function f(x)]: f(-2) = 9(-2) - 7
- [Order of Operations] Evaluate: f(-2) = -25
<em><u>Part C</u></em>
<u>Step 1: Define</u>
<em>Identify.</em>
9x - 7 = 65
<u>Step 2: Solve for </u><em><u>x</u></em>
- [Addition Property of Equality] Add 7 on both sides: 9x = 72
- [Division Property of Equality] Divide 9 on both sides: x = 8
Answer:
f(4)=29
f(-2)=-25
x=8
Step-by-step explanation:
a. to find f(4), you need to substitute x with 4...
f(4)=9(4)-7
f(4)=36-7
f(4)=29
b. This is the same for f(-2)
f(-2)=9(-2)-7
f(-2)=-18-7
f(-2)=-25
c. 9x-7=65
+7 +7 to cancel the 7 out and to isolate the x
9x=72
divide both sides by 9
x=8
So basically f(8)=65
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Answer:
Step-by-step explanation:
A piecewise function g(x) is represented by the graph. Which functions represent a piece of the function? Check all that apply.
g(x) = −2x, −2 < x < 0
g(x) = −2, x < −2
g(x) = x − 2, −2 < x < 1
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