Ahot air ballon was 240 ft above the ground. it decreased its altitude by 6 1/2 ft per min for 15 min, and then increased its altitude by 9 ft. what was the ballon’s overall change in altitude? ? part a write an expression to model the situation. part b answer. part c what is the air ballon’s elevation. plzz i will give you 100 points

Part A The equation to model this would be

240-( 240- 6.5x + 9) = y

x is the minutes the balloon decreases in altitude

Part B plug in x

240- (240 - 6.5(15) + 9) = y

y = 106.5

expression 106.5

Part C altitude is 133.5 (240 - 106.5)

the clues that signal the reader should change tone are the punctuation marks, the grammatical signs. for example, the quotation marks at the beginning of something someone else said literally or the exclamation marks.

the tone of the first line of dialogue until "gettysburg" is a kind tone, a tone of advise. the narrator is trying to the other person in doing something he or she obviously is finding hard to do by giving a piece of advise and bringing up a memory of a successful similar case.

the clue that the reader understand how to read the word "bang" is the exclamation mark. it gives the word a surprise tone, a strong accent.

the best tone for reading the word "bang" is an exciting tone, a surprise one, even a loud one.

the words that should be read with a formal tone are the ones that give factual information. the sentence: mister lincoln couldn't think of anything to say at the gettysburg" gives information about an event and it needs to be read formally, also, when the narrator wants to transmit calmness, a formal and slow tone is needed, because people also transmit messages with the vibrations of our voices and tones.

y=mx+b

step-by-step explanation:

m slope, b y-intercept