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Questions in Grade Middle-school

[Homework Help] Evaluate the expression: \(-9 + (-2)^2\)

[Homework Help] What was a political machine? How did it work?

[Homework Help] What is the answer to: \(-45 = x + (-3) + 50\)?

[Homework Help] Simplify the expression: \(-5 - (-2)^3\)

[Homework Help] What percent of 48 is 15?

[Homework Help] What is \(1 + 2 + 3 + 4 + 5\) all the way up to \(99 + 100\)?

[Homework Help] Macy has completed 78% of the 50 questions on the test. How many questions has Macy completed?

[Homework Help] Determine the number of solutions for each of the following equations: 1. Does the equation [tex]5x + 2 = 5x + 2[/tex] have many solutions? 2. Does the equation [tex]5x + 2 = 2x + 5[/tex] have one solution? 3. Does the equation [tex]5x = 5x + 2[/tex] have no solution?

[Homework Help] A box of cereal states that there are 75 calories in a \(\frac{3}{4}\) cup serving. 1. What is the unit rate for calories per cup? 2. How many calories are there in 4 cups of the cereal?

[Homework Help] What is the most populated city in the world?