2A Quiz

ID: jurov-roluz
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Avatar for Nicole ThomasNicole Thomas, BP BY-NC
Subject: Algebra
Grade: 8
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19 questions

2A Quiz

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Section 2A Quiz - No calculator

1) Use 4 for the following number trick: Add 3. Multiply by 10. Subtract 30. What is your ending number?

2) Write an expression for the number trick. Call your starting number xx .


Choose a number. Add 8. Multiply by 5.

3) Write an expression for the number trick. Call your starting number xx .


Choose a number. Multiply by 3. Subtract 4.

4) Joel is 7 years younger than Annie. If Annie is 12 years old, how old is Joel?

5) Joel is 7 years younger than Annie. If Annie is AA years old, how old is Joel?

6) There are two more students taking English than math. So there are _____ students taking English. Let x = the number of students taking math.

a)

x + 2

b)

x - 2

c)

x ÷\div 2

d)

2x

7) There are half as many students taking music as math. So there are _____ students taking music. Let x = the number of students taking math.

a)

x + 2

b)

x - 2

c)

x ÷\div 2

d)

2x

8) Evaluate the expression for x = -3. x215x\frac{x^{2}-1}{5x}

9) The number of beds needed at a shelter is described by aa+cc+15, where aa is the number of adults and cc is the

number of children. How many beds are needed if there are 230 children and 112 adults?

10) Simplify 6xx+3-4(xx-5)

11) Simplify xx-8+2yy+3-4xx

12) Simplify 3(-2xx+5)+2-4(-4xx-6)

13) Consider the number trick below. Let x = the starting number. Write the result and simplify the expression.


Choose a number. Add 5. Multiply by 6. Subtract 4. Multiply by 2. Divide by 4. Then subtract 13.

14) The operation xΔ\Deltay is defined by this rule: xΔ\Deltay = 11x + 2y. Evaluate 5Δ\Delta4.

15) Is -6x + (-3x) -2y equal to 3x - 2y?

a)

yes

b)

no

16) Is 5x - 4y + 2y - 2x equal to 3x - 2y?

a)

yes

b)

no

17) Is 3(x + 1) - y - y - 3equal to 3x - 2y?

a)

yes

b)

no

18) Write a simplified expression for the area of a rectangle that has a length of 8 and width of 2xx+5

19) Write a simplified expression for the perimeter of a rectangle that has a length of 8 and width of 2xx+5