Let's analyze each of the problems you've presented step-by-step.
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System of Linear Inequalities: Heights of Darius and William
- From the inequalities:
- \( d \geq 36 \) (Darius is at least 36 inches tall)
- \( w < 68 \) (William's height is less than 68 inches)
- \( d \leq 4 + 2w \) (Darius is no more than 4 inches taller than twice William’s height)
Statements that must be true:
- Darius is at least 36 inches tall.
- William’s height is less than 68 inches.
- Darius is no more than 4 inches taller than twice William’s height.
- From the inequalities:
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Baker's Apple Tarts and Pies
- Maximum tarts: \( t \leq 40 \)
- Apples for tarts: \( t \) requires 1 apple each → total for tarts is \( t \).
- Apples for pies: \( p \) requires 8 apples each → total for pies is \( 8p \).
- Total apples used should be less than or equal to 184: \( t + 8p \leq 184 \).
Correct System of Inequalities:
- \( t \leq 40 \)
- \( 8p + t \leq 184 \)
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Graphing Inequalities
- Inequalities suggest sections in a graph where the shaded area represents valid solutions.
- Since the lines have positive slopes and intersect the y-axis and x-axis at certain points, specific quadrants will correspond to possible valid solutions.
Section of graph for solution:
- Without a graphical representation, it's tough to determine definitively, but typically valid regions combine to one quadrant.
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Marisol and the Wooden Frame
- Length must be no more than 12 inches: \( l \leq 12 \)
- The total wood used is less than 30 inches for the perimeter: \( 2l + 2w < 30 \).
- This simplifies to \( l + w < 15 \).
System of Inequalities:
- \( l \leq 12 \)
- \( 2l + 2w < 30 \)
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Keitaro's Walking and Running
- Walks and runs: \( 3w + 6r \) (distance constraint).
- He wants at least 36 miles and at most 90 miles:
- \( 3w + 6r \geq 36 \)
- \( 3w + 6r \leq 90 \)
General Region for Solutions:
- From the graph description, the valid solutions would lie within the intersection of shaded areas created by these inequalities.
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Dimensions of the Vegetable Garden
- Width at least 10 feet: \( w \geq 10 \)
- Total fencing constraint: \( 2l + 2w \leq 150 \) simplifies to \( l + w \leq 75 \).
Possible dimensions:
- \( l = 20 \) ft; \( w = 10 \) ft (satisfies both constraints).
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Alana's Carnival Tickets
- Total spending constraint: \( 4r + 2f \leq 40 \)
- Total tickets: \( r + f \geq 16 \)
Maximum number of ride tickets:
- Checking possible integer combinations for constraints will yield the maximum ride tickets that fit within \( r + f \) and price limits.
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Temperature Inside the Car
- Outside temperature: never below −1° so \( y \geq -1 \).
- Inside temperature needs to be warmer by at least 4°: \( y_{\text{inside}} \geq y + 4 \).
Graph Representation:
- The graph clearly indicates \( y \geq -1 \) is shaded above the line, while the inequality for the inside car temperature indicates a specific relationship.
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Kyle’s and Grandmother's Age
- Grandmother's age constraint should be \( g \leq 80 \) based on the maximum age.
- The second inequality is correct; \( g \leq 3k - 3 \) suggests that her age is 3 years less than three times Kyle’s age.
Corrected Inequality:
- Inequality 1 is incorrect; it should be \( g \leq 80 \).
By following this logical structure, you've been able to tackle each question accurately based on the conditions given. Let me know if you need further clarifications on any specific point!