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ikadub [295]
2 years ago
6

20 POINTS FOR THIS!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics
2 answers:
Sloan [31]2 years ago
7 0

Answer:

b = 13

Step-by-step explanation:

the value of the discount is a constant, while the total cost of the books is a variable because it depends of the purchase

We can write this equation

5b - 7 = 58

Solve it

1) add 7 at both members

5b -7 + 7 = 58 + 7

5b = 65

2) divide both membera by 5

b = 13

LenaWriter [7]2 years ago
4 0
B=13 add 7 to both numbers then divide by 5
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1 2 3 000 000
kkurt [141]

Answer: The answer to this question is $47.56

Step-by-step explanation: The 18 percent tip basically is saying .18 times 58, which equals 10.44 oh it must be A...NO DONT BE FOOLED, the question is asking for the total bill and not what the percentage of the meal was. so you subtract 10.44 from 58 and get 47.56

BOOM

-fellow highschooler

8 0
3 years ago
Which of the following situations calls for a hypothesis test about a population mean?
tigry1 [53]

Answer:

Step-by-step explanation:

Hypothesis test about a population mean is done to evaluate two exclusive statements about a population in order to determine which is best supported by the sample data.

From the situations given, the correct options are

b. A recent study estimated that 20% of all college students in the United States smoke. The head of Health Services at Goodheart University suspects that the proportion of smokers may be lower there. This would require taking a sample and determining the probability of success.

c. A certain prescription allergy medicine is suppose to contain an average of 245 parts per million (ppm) of active ingredient. The manufacturer wants to check whether the mean concentration in a large shipment of pills is 245 ppm or not.

d. A report on the College Board website stated that in 2003 males scored generally higher than females on the SAT exam. An educational researcher wants to check whether this is true in her school district.

3 0
3 years ago
PLEASE HELP WILL MARK BRAINLIST!
Marina CMI [18]

Answer:

37.5

Step-by-step explanation

your answer is 37.5

6 0
3 years ago
PLEASE HELP I'M ON A TIMER! thanks
Zepler [3.9K]
Oh i done this yes sir u r correct
8 0
3 years ago
2( 4x + 2) = 4x - 12(x-1)​
aksik [14]

Answer:

x=\frac{1}{2}

Step-by-step explanation:

distribute 2 into (4x+2) and -12 into (x-1)

8x+4=4x-12x+12

combine like terms

8x+4=-8x+12

add -8x on both sides

8x+8x+4=12

16x+4=12

subtract 4 on both sides

16x=8

divide both sides by 16

x=1/2

hope this helps

8 0
3 years ago
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