Percy solved the equation x2 + 7x + 12 = 12. His work is shown below. Is Percy correct? Explain.
Answers
Percy is not correct because he applied the zero product property to a factored expression that was not equal to 0. He should have subtracted 12 from both sides to get x2 + 7x = 0 before factoring. The correct solutions are 0 and -7
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The table shows the amount that each person spend on snacks, games, and souvenirs the las time they went to the carnival.Sinea- snacks $5/ games $8/ souvenirs $12Ren- snacks $10/ games $8/ souvenirs $20A. Siena wants to spend money using the same ratios as on her last trip to the carnival. If she spends $26 on games, how much will she spend on souvenirs?B. Ren wants to spend money using the same ratios as on his last trip to the carnival. If he spends $5 on souvenirs, how much will he spend on snacks?
What is the tangent ratio of angle x?
A survey shows that the probability that an employee gets placed in a suitable job is 0.65. A psychometric test consultant claims that he could help place any employee in a suitable job based on the result of a psychometric test. The test has an accuracy rate of 70%. An employee working in a particular company takes the test. The probability that the employee is in the right job and the test predicts that he is in the wrong job is ______. The probability that the employee is in the wrong job and the test predicts that he is in the right job is _______.
Answers
Answer:
56 cent
Step-by-step explanation:
divide 1.96 by 3.5
Answers
Residual plot 2: question 1: is scatter plot B. question 2: Not appropriate model
Residual plot 3: question 1: is scatter plot A. question 2: Good (but not perfect) model
B. 60 minutes
C. 30 minutes
D. 24 minutes
2. Annmarie can plow a field in 240 minutes. Gladys can plow a field 80 minutes faster. If they work together, how many minutes does it take them to plow the field?
A. 96 minutes
B. 160 minutes
C. 400 minutes
D. 480 minutes
3.Brody can fill a bowl with candy in 3 minutes. While Brody fills the bowl, Hudson takes the candy out of the bowl. With Hudson taking candy out of the bowl, it takes 5 minutes for Brody to fill the bowl.
Which of the following can be used to determine the amount of time it takes for Hudson to empty the bowl if Perry does not add candy?
A. 1 over 3 minus 1 over x equals 1 over 5
B. 1 over 3 minus 1 over 5 equals 1 over x
C. 1 over 5 minus 1 over x equals 1 over 3
D. 1 over 3 minus 1 over x equals x over 5
4. Leanne can clean a fish tank in 30 minutes. Karl can clean a fish tank in 20 minutes. If they work together, how many minutes does it take them to clean a fish tank?
A. 6 minutes
B.10 minutes
C. 12 minutes
D. 50 minutes
5.Genna can build a cabinet in 4 hours. Claude can build a cabinet in only 3 hours.
Which of the following can be used to determine the amount of time it would take for Genna and Claude to build a cabinet together?
A. 1 over 4 plus 1 over x equals 1 over 3
B. 1 over 4 plus 1 over 3 equals 1 over x
C. 1 over x plus 1 over 3 equals 1 over 4
D. 1 over 3 plus 1 over 4 equals x over 7
Answers
#1.A. 120 minutes
#2.A. 96 minutes
#3.A. 1 over 3 minus 1 over x equals 1 over 5
#4.C. 12 minutes
#5.B. 1 over 4 plus 1 over 3 equals 1 over x
Answer:
1) option: A (120 minutes)
2) option: A(96 minutes)
3) option: A
4) option: C
5) option: B
Step-by-step explanation:
Ques 1:
Let the total work be '240'
filling pipe empty pipe filling+empty pipe
Time 40 min 60 min x
Efficiency 240/40=6 240/60= -4 6-4=2
The efficiency of empty pipe is negative as it lead to more time in filling.
Hence the time taken by both the pipe will be =120 minutes.
Hence, option A is correct.
Ques 2:
Let the total work be '960'
Annmarie Gladys Annmarie+Gladys
Time 240 min 160 min x
Efficiency 960/240=4 960/160=6 6+4=10
Hence, the time taken if they work together is:
Hence, option A is correct.
Ques 3:
Let the total work be '1'
Brody Hudson Brody+Hudson
Time 3 min x min 5 min
Efficiency 1/3 -1/x 1/5
the efficiency of Hudson is negative as he is taking out the candies.
since, efficiency of Brody+efficiency of hudson= efficiency of both
that means
Hence, option A is correct.
Ques 4:
Let the total work be '60'.
Leanne Karl Leanne+Karl
Time 30 min 20 min x
Efficiency 2 3 5
Hence, the time taken by both of them is:
Hence, option C is correct.
Ques 5:
Let the total work be '1'
Genna Claude Genna+Claude
Time 4 hrs 3 hrs x hrs
Efficiency 1/4 1/3 1/x
Since, efficiency of Genna+Efficiency of Claude=Efficiency of both
that means
Hence, option B is correct.
Answers
64
80 80
thats how you havw to put it
Answer:
80/100 is 80%
Step-by-step explanation:
Answers
y=3
y=x-1
y=3x-1
Answers
Answer:
y = -1
Step-by-step explanation:
The graphed function is:
- y = 2.5
The line parallel to this has to be in the form of:
- y = k, where k≠ 2.5
Since the line passes through the point (3, -1), its y coordinate is -1, therefore the function is:
- y = -1
Correct option is the first one