Using the variable x, write the interval as an inequality.(-9, 7]
A. -9 < x ? 7
B. -9 ? x ? 7
C. x ? 7
D. -9 < x < 7
Answer: A
Mathematics
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Find the perimeter.
A. 204 cm B. 68 cm C. 76 cm D. 64 cm
Mathematics
Solve the equation. If the equation is an identity or a contradiction, state this.0.70x - 0.40(80 + x) = -0.25(80)
A. x = 40 B. x = 50 C. x = 20 D. x = 30
Mathematics
Find any modes that exist.5, 9, 25, 3, 2, 8, 52, 1, 4, 16
A. 9 B. No mode C. 8 D. 11.9
Mathematics
First round each number to one non-zero digit. Then perform the calculation using the rounded numbers to obtain an estimate.72.9 - 5.49
A. estimate: 75 B. estimate: 66 C. estimate: 74 D. estimate: 65
Mathematics