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dedylja [7]
3 years ago
14

For each incorrect answer on a test, the teacher changes the total points possible by - 3

Mathematics
2 answers:
elena-14-01-66 [18.8K]3 years ago
8 0

Answer:

40

Step-by-step explanation:

You would mutiply 8 times -3 and you would get -24 and 64 + (-24) = 64 - 24 which equals 40

Bogdan [553]3 years ago
5 0

Answer:

40

Step-by-step explanation:

8 incorrect answers x -3 points per wrong answer. 64 - 24 points taken off = score of 40.

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Which function is quadratic?
PilotLPTM [1.2K]

Answer:

step 1. A, B,D are incorrectly written as these are not all coordinates. they must be written (x, y)

step 2. so the question becomes is C a quadratic

step 3. The x values must be evenly spaced. the x values are evenly spaced by a difference of 4

step 4. write out the y values: -126, -14, 2, 18

step 5. write out the differences: 140, 16, 16

step 6. write out the differences: -124, 0.

step 7. after doing this twice the numbers nust be the same for this to be a quadratic which they aren't

step 8. C is not a quadratic.

8 0
3 years ago
A questionnaire has determined that 20% of the residents of Flaugamuck County own an iPod. Furthermore, 80% of these iPod owners
nydimaria [60]

Answer:

P = 7.14%

The percentage of those 30 years or older that own an ipod is 7.14%

Step-by-step explanation:

Given;

Percentage of ipod owners Pi = 20%

Percentage who don't own ipod Pd = 100-20 = 80%

For age 30 or older;

Percentage of ipod owners who belong to this group

Po = 20% of Pi

Percentage who don't have an ipod but belong to this group Pu = 100-35% = 65% of Pd

The percentage of those 30 years or older that own an ipod is;

P = Po/(Po+Pu) × 100%

Po = 20% of Pi = 20% of 20% = 0.2×20 =4%

Pu = 65% of Pd = 65% of 80% = 0.65×80% = 52%

Substituting the values;

P = 4/(4+52) × 100%

P = 7.14%

5 0
3 years ago
Evaluate each expression.<br> 6! =<br> 3!. 21 =<br> 11
NNADVOKAT [17]

Answer:

here we work with factorials, so if we have a whole number N, then:

N! = N*(N-1)*.....*2*1

then, for the given expressions we have:

1) 6! = 6*5*4*3*2*1 = 720.

2) 3!*21 = (3*2*1)*21 = 216

3) and the last expression seems incomplete, i guess this is:

11! = 11*10*9*8*7*6*5*4*3*2*1 = 39,916,800

8 0
3 years ago
Please help I’m on a time limit
Salsk061 [2.6K]

Answer:

1

Step-by-step explanation:

In the picture

8 0
3 years ago
2t+7=-1 inverse the term without variable
gulaghasi [49]
Simplifying:
2t+-7=1

Reorder the terms:
-7+2t=1

Solving variable for "t."

Move all terms containing "t" to the left

Add "7" to each side of the equation
-7+7+2+=1+7

Combine the terms
-7+7=0
0+2+=1+7
2t=17

Combine the like terms:
1+7=8
2t=8

Divide each side by 2. You now have: t=4

Good luck, hope this helped! :)
8 0
3 years ago
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