natalie2sheffield
13.10.2019 •
Mathematics
1.) reggie lost 3 spaceships in level 3 of a video game.he lost 30 points for each spaceship.when he complete level 3 he earned a bonus of 200 points.by how much did he score change?
2.) simplify: -6(13)-21
3.) bella pays 7 payments of $5 each to a game store.she returns one game and receive $20 back. what is the change to the amount of money she has?
4.) ron lost 10 points seven times playing a video game. he then lost an additional 100 points for going over the time limit. what was the total change in his score?
9.) ned took a test with 25 questions. he lost 4 points for each of the 6 questions he got wrong and earned an additional 10 points for answering a bonus question correctly. how many points did ned receive or lose overall?
10.) mr. harris has some money in his wallet. he pays the babysitter $12 an hour for 4 hours of babysitting. his wife gives him $10 and he puts the money in his wallet. by how much does the amount in his wallet change?
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Ответ:
1. 110
2. -99
3. $35
4. $30
9. 14 points
10. Amount in his wallet reduced by $38
Step-by-step explanation:
1.
Number of points lost = 30 × 3 = 90
Number of points earned at the end of level 3 = 200
Therefore, the score changed by 200 - 90 = 110
2. - 6(13)-21 = - 78 - 21 = - 99
3. Amount paid by Bella = 7×5 = $35
Amount received by Bella = $20
Therefore, change in amount of money with Bella = 35 - 20 = $15
4. Points lost by Ron playing a video game= 10 ×7 =70
Points lost for going over the time limit = 100
Therefore, total change in his score = 100 - 70 = $30
9. Number of questions in a test = 25
Points lost = 4 x 6= 24
Points earned = 10
Therefore, he lost 24 - 10 = 14 points
10. Amount given to babysitter = $12 × 4 = $48
However his wife gives him $10, so he has to pay just $48 - $10 = $38
Therefore, amount in his wallet reduced by $38
Ответ:
and the constant multipule rule
so
take deritivitve ad apply constnat multipule and power rule
at x=9