sign operations

blair’s bank account was overdrawn by $40. she spent $30 at the grocery store. what is the balance in her account now? The word overdrawn means a negative balance. So we start with: -40 Spending 30 at the grocery store means we subtract 30 from our initial balance: -40 - 30 = -70 or $70 overdrawn

what is 3 degrees below zero Below zero means negative, so we write this as: -3

A roller coaster begins at 90 feet above ground level. Then it descends 105 feet. Find the height of the roller coaster after the first descent. 90 feet above ground level is written as +90 Descending 105 feet means we subtract 105 feet to get: +90 - 105 = -15 or 15 feet below ground level

A mountain with a base 6684 feet below sea level rises 22304 feet. What is the elevation above sea level of its peak? Below sea level is written as a negative, so we have: -6684 + 22304 = 15,620 feet above sea level

A submarine is 75 feet below sea level. It descends another 25 feet every 10 seconds for 3 minutes. What integer represents the submarines current location? Assumptions and givens: Let m be the number of minutes 10 seconds is 1/6 of a minute, 6 (10) seconds blocks per minute * 3 minutes = 18...

A submarine at an elevation of -185 meters descends to 3 times that elevation. Then, it elevates 90 meters. What is the submarines new elevation? 3 times the current elevation is: 3 * -185 = -555 Elevating 90 meters means we have a positive change: -555 + 90 = -465

The marianas trench is 10415m below the sea level. Directly above it a helicopter is hovering 3200m above sea level. How far is the helicopter from the trench? Below sea level is negative: -10415 Above sea level is positive: +3200 The distance is found by: +3200 - -10415 +3200 + 10415 13,615

A company has 95 employees. 4 get sacked. 57 quit. 52 are hired. How many employees are there now? Take this in pieces We start with 95 employees 4 get sacked (fired). So we subtract: 95 - 4 = 91 57 quit. We subtract: 91 - 57 = 34 52 are hired. We add: 34 + 52 = 86 employees

Jelaskan secara tepat, memperagakan balok garis bilangan untuk menjelaskan bentuk operasi (-6)-(-8) Tolak negatif adalah positif. Oleh itu, kami mempunyai: -6 + 8 = 2 Pada garis nombor, kita mulai pada -6 dan beralih ke kanan 8 unit menjadi 2

A roller coaster begins at 90 feet above ground level. Then it descends 105 feet. Find the height of the coaster after the first descent. 90 feet above and then we descend 105 feet, meaning we subtract: 90 - 105 = -15. We read this 15 feet below ground level

A customer withdrew $100 from a bank account. The customer then deposited $33 the next day. Write and then evaluate an expression to show the net effect of these transactions. Withdrawals are negative since we take money away Deposits are positive since we add money So we have: 100 withdrawal...

A football team gained 8 yards on a first down, lost 12 yards on the second down, and gained 16 yards on the third down. How many yards did the team gain or lose? Assumptions: We reflect gains by adding We reflect losses by subtracting Plays: Gain of 8 = +8 Loss of 12 = -12 Gain of 16 = +16...

Julio had $20 in his account. He made two withdrawals of $15 and $25, and then he deposits $28. What is his account balance now? Note: Balances add and Withdrawals subtract. So we have: 20 - 15 - 25 + 28 8

Mount McKinley in Alaska, the highest mountain in North America, is 20,320 feet above sea level. Death Valley, the lowest point, is 280 feet below sea level. What is the difference in height between Mount McKinley and Death Valley? Regarding height with respect to sea level... Above sea level...

The temperature was 7℉ below zero. The temperature drops by 6℉. What is the temperature now Below zero means negative. A drop means we subtract, so we have: 7 below zero = -7 Drops by 6 = -6 -7 - 6 = -13

A helicopter is flying at an altitude of 785 feet. It descends 570 feet, and then ascends 595 feet. Write an expression to represent this situation. Then determine and interpret the sum. Start at +785 feet Descend 570 feet means using a minus sign -570 Ascend 595 feet means using a plus sign...

Mt. Everest, the highest elevation in Asia, is 29,028 feet above sea level. The Dead Sea, the lowest elevation, is 1,312 feet below sea level. What is the difference between these two elevations? Above sea level is listed as positive (+) Below sea level is listed as negative (-) We have...

A football team gained 4 yards on a play,lost 8 on the next play ,then gained 2 yards on the third play write and addition expression Gains are expressed with positives (+) and losses are expressed with negatives (-): Gained 4 years: +4 Lost 8 on the next play: -8 Gained 2 yards on the third...

In the last year a library bought 237 new books and removed 67 books. There were 5745 books in the library at the end of the year. How many books were in the library at the start of the year Let the starting book count be b. We have: We start with b books Buying 237 books means we add (+237)...

The temperature when Spencer arrived at school was a very chilly – 4°F. By the time school got out, the temperature had risen 13°F. What was the temperature when school got out? -4 + 13 = 9 degrees