Estimating Solutions of Systems Answers

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1
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Which are possible solutions for the number of minutes Joshua can participate in each activity? Check all that apply.

A
40 minutes walking, 40 minutes basketball
B
60 minutes walking, 20 minutes basketball
C
20 minutes walking, 60 minutes basketball
D
50 minutes walking, 50 minutes basketball
E
60 minutes walking, 80 minutes basketball
F
70 minutes walking, 60 minutes basketball
2
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17✔ 354042

Answer not available
3

Which amounts of materials satisfy the relationship?

A
2 cubic yards of compost, 8 cubic yards of topsoil
B
4 cubic yards of compost, 5 cubic yards of topsoil
C
1 cubic yard of compost, 12 cubic yards of topsoil
D
3 cubic yards of compost, 12 cubic yards of topsoil
10

The sum of two positive integers, x and y, is not more than 40. The difference of the two integers is at least 20. Chaneece chooses x as the larger number and uses the inequalities y ≤ 40 – x and y ≤ x – 20 to determine the possible solutions. She determines that x must be between 0 and 10 and y must be between 20 and 40. Determine if Chaneece found the correct solution. If not, state the correct solution.

A
Yes, Chaneece found the correct solution.
B
No, Chaneece mixed up the variables. The correct solution is that x must be between 20 and 40 and y must be between 0 and 10.
C
No, Chaneece should not have restricted the solution to quadrant I. The correct solution is that x can be all real numbers and y must be less than 10.
D
No, Chaneece looked at the wrong area of the shaded graph. The correct solution is that x must be between 0 and 30 and y must be between 0 and 40.

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