Mathematics 8 - 2nd PT reviewer

"If the figure is a quadrilateral, then it is a four-sided polygon".

what is "If a polygon is not a quadrilateral, then it is not four-sided."?

• contrapositive

• conclusion

• inverse

• converse

What assumption would you make from the statement that, "There can be only one 90° angle in a triangle" using indirect proof?

• All the angles in a triangle add up to 90°.

• All the angles in a triangle add up to 180°.

• There can be more than one 90° angle in a triangle.

• There can be more than one 180° angle in a triangle.

“If the figure is a quadrilateral, then it is a four-sided polygon”.

what is "If a polygon is not four-sided, then it is not a quadrilateral"?

• contrapositive

• converse

• hypothesis

• inverse

Which of the following is the standard form of a linear function?

• f(x)=bx+m

• f(x)=bx-m

• f(x)=mx+b

• f(x)=mx-b

Which of the following is the coordinates of the 𝑦-intercept?

• (0,0)

• (0,b)

• (b,0)

• (a,b)

Given the variables: the cost to rent an apartment and the length of time it is rented, which is the independent variable?

• the length of time it is rented

• the cost of rental and length of time

• the cost of rental after a month

• the cost to rent an apartment

In how many point(s) does a vertical line intersect the graph of a function?

• at least one point

• at exactly one point

• more than one point

• at exactly two points

Which among pairs of statements are logically equivalent?

• If-then:  If a shape is a quadrilateral, then it is a polygon.

  Converse: If a shape is a polygon, then it is a quadrilateral.

• If-then:  If a shape is a quadrilateral, then it is a polygon.

  Inverse: If a shape is not a quadrilateral, then it is not a polygon.

• If-then:  If a shape is a quadrilateral, then it is a polygon.

  Contrapositive: If a shape is not a polygon, then it is not a quadrilateral

• Inverse: If a shape is not a quadrilateral, then it is not a polygon. 

  Contrapositive: If a shape is not a polygon, then it is not a quadrilateral

Which scenario fits this graph best?

• You have P20 to spend. Hotdog cost P5 and hamburger cost P2. How many hotdogs and hamburgers can you buy?

• You have P30 to spend. Hotdog cost P5 and hamburger cost P3. How many hotdogs and hamburgers can you buy?

• You have P20 to spend. Hotdog cost P4 and hamburger cost P10. How many hotdogs and hamburgers can you buy?

• You have P30 to spend. Hotdog cost P6 and hamburger cost P3. How many hotdogs and hamburgers can you buy?

Rhea is buying burger and pizza for snacks with her friends. Each burger costs 𝑃35 and each box of pizza costs 𝑃100. Rhea wanted to spend no more than 𝑃500, but she needs at least 3 burgers and 2 boxes of pizza. Let 𝑥 be the number of burger and 𝑦 be the number of boxes of pizza. If you were to create the system of linear inequalities in two variables that represents the situation, which one is it?