Answer:
Line 3 is incorrect
Step-by-step explanation:
Required
Which line is wrong and why
Line 1: 
Open brackets
Line 2: 
Collect like terms
Simplify:
Line 3: 
According to the question, the line 3 is:
Line 3: − 3x + 15 = − 4x + 42
<em>This is incorrect because -5x - 2x = -7x; and not -5x - 2x = 3x as seen in the question</em>
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Answer:
An expression is a combination of numbers, variables, and symbols to be solved. An equation has expressions that are separated by an equals sign.
Step-by-step explanation:
Answer:
slice priced $1.50 is better value
Step-by-step explanation:
Angles around a point add up to 360°
Area of a circle = πr²
360° ÷ 60° = 6
⇒ This slice is 1/6 of the whole pizza
⇒ area of the slice = (1/6)π × 6² = 6π in²
⇒ $1.50 ÷ 6π = $0.079577... per in²
360° ÷ 45° = 8
⇒ This slice is 1/8 of the whole pizza
⇒ area of the slice = (1/8)π × 7² = (49/8)π in²
⇒ $1.70 ÷ (49/8)π = $0.088347.. per in²
Therefore, the slice priced $1.50 is cheaper per in²
Answer:
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