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Biblioteka

P1.2: Inequalities and Words (1.5-day)

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Pitanje 1
1.

Match the descriptions with the appropriate symbol.

  • greater than a number

  • greater than or equal to a number

  • no more than a number

  • a open circle at a number, shaded on the left

  • less than a number

  • a closed circle at a number, shaded on the left

  • a open circle at a number, shaded on the right

  • a closed circle at a number, shaded on the right

  • at least a number

  • less than or equal to a number

  • > x

  • < x

  • > x

  • < x

Pitanje 2
2.

Solve the inequality.

2x - 6 > 3x - 12

Enter your answer in "x>#" format, no spaces. The answer is not necessarily the ">" symbol. Note that typing "<=" creates a < sign.

Pitanje 3
3.

Solve the inequality.

4x - 5 > x - 11

Enter your answer in "x>#" format, no spaces. The answer is not necessarily the ">" symbol. Note that typing "<=" creates a < sign.

Pitanje 4
4.

Solve the inequality.

6 - 2(x+1) < 2x

Enter your answer in "x>#" format, no spaces. The answer is not necessarily the ">" symbol. Note that typing "<=" creates a < sign.

Pitanje 5
5.

Solve the compound inequality.

|3x-6|<15

Enter your answer in "#<x<#" format, no spaces. Note that typing "<=" creates a < sign.

Pitanje 6
6.

Solve the compound inequality.

8-|5x-7|>0

Enter your answer in "#<x<#" format, no spaces. Note that typing "<=" creates a < sign. Use fractions, not decimals.

Pitanje 7
7.

Solve the compound inequality.

|x+6|>5

Use "x># or x<#" format, with exactly one space before and after the "or".

Pitanje 8
8.

Solve the compound inequality.

-\frac{1}{2}|x+3|<-4

Use "x># or x<#" format, with exactly one space before and after the "or".

Pitanje 9
9.

Which of the following values of x satisfy the following inequality?

2(5 - x) < 20

Check all that apply.

Pitanje 10
10.

Which of the following values of x satisfy the following inequality?

|x+5| > 3

Check all that apply.

Pitanje 11
11.

Which of the following values of x satisfy the following inequality?

|x+5| < 2

Check all that apply.

Pitanje 12
12.

Match the phrases with the corresponding mathematical expressions.

Stavka koja se može prevućiarrow_right_altOdgovarajuća stavka

a number less than 2

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2x

two more than a number

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x/2

half a number

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x-2

the sum of twice a number and two

arrow_right_alt

x<2

twice the sum of a number and two

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x+2

twice a number

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2(x+2)

two less than a number

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2x+2

Pitanje 13
13.

A phone plan has a $50 signup fee. For each gig of mobile data, the user must pay $5.

A user paid $85 total for her phone plan.

Write an equation which, when solved for x, gives the number of gigs she signed up for. Use the numbers given in the problem, no spaces or "$". Put the x on the left side of the equation.

Pitanje 14
14.

Al weighs three pounds less than half his dad. Al weighs 60 lbs.

Write an equation that, when solved for x, gives Al's Dad's weight. Use the numbers given in the problem, no spaces. Put the x on the left side of the equation.

Pitanje 15
15.

A rocket can carry up to 300 ounces of food-related load. Protein packs weigh 32 oz each. The packaging requires a 4 oz pair of scissors to open.

Write an inequality that, when solved for x, gives the amount of protein packs that can be loaded on the rocket. Use the numbers given in the problem, no spaces or "oz". Put the x on the left side of the equation. Note: to type "<" or ">", simply type "<" or ">", followed by "=".

Pitanje 16
16.

Tony wants to paint 1000 sq ft. He already has enough paint to cover 200 sq ft. Each can he buys will cover 500 sq ft.

Write an inequality that, when solved for x, gives the number of cans he can buy to have enough paint for his goal. Use the numbers given in the problem, no spaces or "oz". Put the x on the left side of the equation. Note: to type "<" or ">", simply type "<" or ">", followed by "=".

Pitanje 17
17.

Match the situations with their descriptions

Stavka koja se može prevućiarrow_right_altOdgovarajuća stavka

linear equation

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split into two, max two solutions

linear inequality

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split into two, be careful to flip the symbol

absolute value inequality

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stays one, max one solution

absolute value equation

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stays one, be careful to flip the symbol