In speech class, you lose 3 points for every 30 seconds you go over the time limit. your speech is 90 seconds over the tom limit. what integer represents the change in your points?

-9

Step-by-step explanation:

Given,

The points lose for 30 seconds of over the time limit = 3 points,

So, points lose for 1 second = = points,

Thus, the point lose for 90 seconds = 90 × point lose for 1 seconds

= 90 ×

= 9

Now, if the losing points is 9 then the change in points = -9,

( negative sign shows losing the points )

Which is the required integer.

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis:

all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true