For questions 3 that’s all i need help please !!! For a test and please put your answers below !!! It’s not D because one of friends had took it already and told me he choose D and it was incorrect. Thank you.

I'll do the first four problems to get you started

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Problem 15

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Explanation:

The price dropped by $60, since 150-90 = 60. This is the discount, which is the amount you save. Divide this over the original price ($150) and we get 60/150 = 0.40 = 40%

Therefore, the price has been reduced by 40%. If we take 40% of 150, then 0.40*150 = 60 showing that 40% of $150 is 60 dollars. This matches up with the discount value mentioned earlier. So it helps verify the answer.

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Problem 16

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Explanation:

The pay raised by 12-10 = 2 dollars. So the percent increase is 2/10 = 0.20 = 20%

Note how 20% of 10 = 0.20*10 = 2 is the pay raise amount; meaning that 2 is 20% of 10.

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Problem 17

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Explanation:

I'll use a formula this time, but we could follow the same idea as the previous problems. This is to give another approach.

A = old value = 8

B = new value = 12

C = percent change

C = [ (B-A)/A ] * 100%

C = [ (12-8)/8 ] * 100%

C = (4/8)*100%

C = 0.50*100%

C = 50%

50% is the same as half of the value. Note how half of 8 is 4, ie 50% of 8 = 0.50*8 = 4. So this is the amount of increase when going from 8 to 12.

Side note: The "B-A" portion in the numerator represents the change in value. We divide this change over the original amount "A" and then multiply by 100% to get the percent change we're after.

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Problem 18

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Explanation:

I'll use the formula again

A = old value = 3.00

B = new value = 2.28

C = percent change

C = [ (B-A)/A ] * 100%

C = [ (2.28-3.00)/3.00 ] * 100%

C = (-0.72/3.00)*100%

C = -0.24*100

C = -24%

The negative percent change means we have a percent decrease. So we have a 24% decrease. Since your teacher is asking about how much the percent reduction is, we'll write the positive version of this percentage.

Problems 19 through 22 will follow the same ideas as shown in the previous problems.

OK ITS OK IM GOD CALM DOWN

Answer:

Step-by-step explanation:

(1)

If she got 10 answers right, she got 5 * 10 = 50 marks before anything was deducted.

Since she wound up with 30 marks, she lost 50 - 30 = 20 marks. If you don't feel comfortable with this, call it -20

Each incorrect answer cost her -2 marks.

Divide -20 /-2 = 10

She has answered 10 questions incorrectly.

(ii)

5x - 2y = 44

x + y = 13             Multiply this equation by 2

2x + 2y = 26

Rewrite the first and third equations

5x - 2y = 44

2x + 2y = 26      Add  

7x = 70              Divide by 7

x = 70/7

x = 10

So 10 questions were answered correctly

x + y = 13

10 + y = 13

y = 3

Answer

10 were answered correctly

3  were answered incorrectly

Answer:

It's 4/52

Step-by-step explanation:

because there is four threes in a standard deck of playing cards which has 52 cards in all.

Answer:

4/52 = 1/13

Step-by-step explanation:

the are four 3's in standard deck of cards

Answer:

(8.50x + 2000)/x and x>1

Step-by-step explanation:

Well, this may not be the exact answer, as it seems you have the choices unlisted--if they even exist at all. But, I'll make do with what I've provided, so

In the question, it says the collective cost for each individual bolt is $8.50, and that we can use the variable x to represent the number of bolts the company wishes to produce. So, this can be shown using 8.50x.

The fixed cost is set in stone, so no alterations need to be applied, and only cause the total to amount to a greater number. So, we end up with (8.50x + 2000)/x and x>1 is the rule for the values of x. Essentially, all that means is that the company will always produce more than one bolt.

Answer:

7.5

Step-by-step explanation:

thirty divided by 4 is 7.5 or 7 1/2

Answer:

That might be possible though.

Step-by-step explanation:

If you divide 30 by 7.5, you'll get 4. With any other number, you'll get 3,10,6,5,1, and 30. If you use a decimal, it might be possible it'll give you the answer you wanted.

Answer:

D

Step-by-step explanation:

Answer:

The answer is: y = - |x+1|+1

Answer:

72.500

Step-by-step explanation:

I'm not sure, but I'm 80% sure

Answer:

4300

Step-by-step explanation:

i think this is what you want

Answer: 62

Step-by-step explanation: Set up your equation

Check your work. 62+21=83. 2(62)= 124. 124-41=83. Both equations equal 83, so the solution is correct.

Answer:

36x

Step-by-step explanation:

I believe this should be the answer. I hope it helps.

Answer: The three methods are the treatments and the response is the score achieved on the quiz.

Step-by-step explanation:

The three techniques are the treatments, and the results are the final score.

what is response variable in the experiment?

The researcher predicts that a variable will change if the controlled variable changes; this variable is known as a responsive variable. A dependent variable is another name for a responsive variable.

Solution:

Three methods are assigned for teaching mathematics.

Randomly ten students are assigned to each of the method.

There scores are then recorded on a quiz.

It is clear that the response will be the score card of the students either scoring high marks or not being able to clear it.

And the treatments are three for if the student is not able to understand any of the method.

Hence the three methods serve as treatments, and the outcomes determine the final grade.  

Learn more about "Logical reasoning questions" here-

brainly.com/question/25175983

#SPJ2

Answer:

84 cm²

Step-by-step explanation:

1/2x14x12=84

Answer:

solution given:

by using Pythagoras law:

h²=p²+b²

x²=8²+4²

x=√80units

Answer:

1

a= 25/36

b= -1

c= -8/15

2

a=positive

b=negative

c=positive

d=positive

hope it helps

Answer:

The domain is (-2, 8, 3, 2)

Step-by-step explanation:

The domain is such because domain is the x-element or the one you see at first in the ordered pairs.

Answer:

C) 2/7, 1/2, 5/6, 4/2

Step-by-step explanation:

Answer:

for part b the answer is 90 degrees

Step-by-step explanation:

2 is adjacent from 5 so they are the same degree number

Answer: B

Step-by-step explanation:

Explanatio⁣n i⁣s i⁣n a fil⁣e

bit.[tex]^{}[/tex]ly/3a8Nt8n

Answer:

26/52 or 1/2

Step-by-step explanation:

There are 1-9, King, Queen, Jack, for both Diamonds and Hearts

Answer:

Step-by-step explanation:

a

or D

Answer:

48

Step-by-step explanation:

details will be added

Answer:

12 cups of sugar

Step-by-step explanation:

3÷0.25=12

1/4=0.25

Ok send the picture so I can help you.

Answer:

what is the question? I can help

Step-by-step explanation:

Answer:

The mean is of 45.

The standard deviation is 2.28.

Step-by-step explanation:

The mean is the sum of all values divided by the number of values.

The standard deviation is the square root of the sum of the difference squared between each value and the mean, and divided by the number of values.

Mean:

[tex]M = \frac{45 + 48 + 42 + 47 + 43}{5} = 45[/tex]

The mean is of 45.

Standard deviation:

[tex]M = \sqrt{\frac{(45-45)^2 + (48-45)^2 + (42-45)^2 + (47-45)^2 + (43-45)^2}{5}} = 2.28[/tex]

The standard deviation is 2.28.

Answer:

It's C

Step-by-step explanation: How far is it from -2 to -8 horizontally?

They are 6 apart, right?

How far is -4 to 4 vertically? 8.

__________________________________________________________

6^2 + 8^2 = c^2

36 + 64 = c^2

c = 100 = 10

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So in short yea...it's C UwU

Answer: The answer is D

Step-by-step explanation:

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