Post test Q2 grade 9

Which symbol is not used to describe a quadratic inequality?

• >

• =

• <

• ≥

What must be the value of k that will not make 0.25w² + 2w > kw² − 4 a quadratic inequality?

• 2

• $-\frac{1}{4}$

• $\frac{1}{4}$

• $\frac{1}{2}$

Which of the following numbers satisfy the quadratic inequality x² + 3x – 10 > 0?

• 2

• -5

• 3.4

• -2

To solve a quadratic inequality, which of the following should you find first?

• critical numbers

• test intervals

• test numbers

• inequality symbol

Which of the following numbers is part of the solution set of x² – x – 2 < 0?

• 3

• 1

• 2

• -4

If one test interval is −2 < x < 6, which of the following numbers can be test numbers in that interval?

• -5 and 4

• -3 and 8

• 4 and -1

• 5 and 8

The area of a rectangle is at least 560 square inches. The length is 3 inches more than twice the width. What symbol will you use to represent the inequality?

• $>$

• $\le$

• $<$

• $\ge$

The sum of two positive integers is 86 while their product is at most 1800. Which of the following pairs of numbers is not part of the solutions of the problem?

• 36 and 50

• 20 and 10

• 40 and 46

• 35 and 51

The base of a triangle is 2 cm more than its height. Its area does not exceed 84 cm². If h is the height of the triangle, what are the critical numbers of the quadratic inequality that represents the problem?

• 12 and 14

• -12 and 14

• -14 and 12

• -14 and -12

The sum of two positive integers is 86 while their product is at most 1800. Which symbol will you use to represent the inequality?

• $>$

• $\le$

• $<$

• $\ge$