test math quiz

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When a parenthesis is preceded by a minus sign, each phrase changes to a different sign when the parentheses are removed.

Correct! Wrong!

If a minus symbol is present outside of parentheses, the terms inside the parentheses will alter when the parenthesis are removed. For instance,
- (2x - 4y) (2x - 4y)
-2x + 4y

The age of Helen is N. Which of the following algebraic statements demonstrates Matt's age today if he is twice as old?

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The algebraic formula to determine Matt's age would be 2 x N or 2N if Helen is N years old and Matt is 2N years older than Helen.

Which of the following is V in the equation V = 2m - 3?

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A variable that depends on one or more other variables is referred to as a dependent variable. V is a function of m's value in this equation.
A variable that may have its value determined independently of the values of other variables is known as an independent variable. M is an independent variable in this equation.

Which of the following is 3 in B = 3 + 4w?

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A constant is a number that stays the same. Three is a constant number that will not change in this equation.
A coefficient is a digit multiplied by a variable. 4 is the coefficient of the independent variable w in this equation.

The height ratio between two structures is 7 to 5. The tallest structure is 210 feet. How high is the second structure?

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7/5 = 210/x
7x = 1,050
x = 150

-3ab + 4ac - 2ad = -(3ab - 4ac + 2ad)

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-3ab + 4ac - 2ad = -(3ab - 4ac + 2ad)
-3ab + 4ac - 2ad = -3ab + 4ac - 2ad

A given number plus three times that amount equals 40. What number is it?

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8 + 3(8) = 32
9 + 3(9) = 36
10 + 3(10) = 40
11 + 3(11) = 44

What is the value of 6X + 2X - X if X = 5?

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If x = 5,
6x + 2x - x =
6(5) + 2(5) - 5 =
30 + 10 - 5 = 35

Peter buys more C bats after purchasing B bats. Then he hands out D bats. Which of the following algebraic statements accurately expresses Peter's remaining bats?

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The formula B + C would be used to calculate Peter's total number of bats if he starts with B bats and then purchases C more bats.
When Peter gives away D bats, the total of B + C would be subtracted from D bats to show how many he still possesses.
The equation is, therefore, B + C - D.

A father gave his two boys $500. One son received X dollars from him. Which of the following terms accurately depicts how much he gave the other son?

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If one son received a sum of X, the other son would have received an amount of $500 - X.

IF 10 is divided into two parts, the second of which is represented by y.

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If 10 is divided into two parts, with y being one of the parts, the second component will be 10 - y.

Find 3 integers that follow one other such that the sum of the 3rd and the 2nd is greater than 8 in total.

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x = 1st number
x + 1 = 2nd number
x + 2 = 3rd number
3x = x + 1 + x + 2 + 8
3x = 2x + 11
x = 11

Which of the following doesn't qualify as a grouping symbol?

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Parentheses, brackets, and braces are grouping symbols used in mathematics that can include integers, variables, and operations. As indicated by the grouping sign, perform the operation first. In contrast, an arrow is a notation that implies that both sides of a notation are equal.