Tutors Answer Your Questions about Functions (FREE)
Question 219561: I understand a and c of this problem but I cannot figure out b and d because of the month to days thing. The question is;
Newborn blue whales are approximately 24 feet long and weigh 3 tons. Young whales are nursed for 7 months, and by the time of weaning they often are 53 feet long and weigh 23 tons. Let L and W denote the length (in feet) and the weight (in tons), respectively, of a whale that is t months of age.
a.) If L and t are linearly related, express L in terms of t.
L=mt+b
53=m(7)+24
29/7=m
L=(29/7)m+24
b.) What is the daily increase in the length of a young whale? (Use 1 month= 30 days)
???
L=(29/7)?+24
c.) IF W and t are linearly related, express W in terms of t.
W=mt+c
23=m(7)+3
20/7=m
W=(20/7)m+3
d.) What is the daily increase in the weight of a young whale?
W=(20/7)?+3
Click here to see answer by jsmallt9(3758)  |
Question 219561: I understand a and c of this problem but I cannot figure out b and d because of the month to days thing. The question is;
Newborn blue whales are approximately 24 feet long and weigh 3 tons. Young whales are nursed for 7 months, and by the time of weaning they often are 53 feet long and weigh 23 tons. Let L and W denote the length (in feet) and the weight (in tons), respectively, of a whale that is t months of age.
a.) If L and t are linearly related, express L in terms of t.
L=mt+b
53=m(7)+24
29/7=m
L=(29/7)m+24
b.) What is the daily increase in the length of a young whale? (Use 1 month= 30 days)
???
L=(29/7)?+24
c.) IF W and t are linearly related, express W in terms of t.
W=mt+c
23=m(7)+3
20/7=m
W=(20/7)m+3
d.) What is the daily increase in the weight of a young whale?
W=(20/7)?+3
Click here to see answer by solver91311(24713)  |
Question 220213: Write an equation,in terms of x and y, for the functions depicted by the table.The ordered pairs from the table would be the following (1,3)(2,9)(3,27)(4,81)(5,243). I tried finding slope but then when I plotted the ordered pairs on a graph I realized it wasn't linar but a curve. So I'm lost. I can see a relation in the output numbers (they seem to be multiplied by 3 (3x3=9x3=27x3=81x3=243) but I can't figure out how you plug the inputs of (1,2,3,4,5,)into a function equation to get to get those output numbers. Please help I'm stummped!!
Click here to see answer by jim_thompson5910(35256) |
Question 220649: The table shows the number of active red-cockaded woodpecker clusters in a part of the De Soto National Forest in Mississippi. Write an equation that models the number of active clusters as a function of the number of years since 1990
Year 1992 1993 1994 1995 1996 1997 1998 1999 2000
Active clusters 20 28 34 40 42 48 52 56 63
Click here to see answer by stanbon(75887) |
Question 222059: i have a two part symmetry and function related question:
A. Find the point of symmetry of the graph of the cubic function:
f(x)=-x^3+15x^2-48x+45
B. The function has a local minimum at (2,1). At what point does a local maximum occur?
I don't understand how to go about this problem.. help?
Click here to see answer by Alan3354(69443)  |
Question 223734: The price of a company's stock opened at $68, dropped $5, and gained $7 during the course of a day. What was the closing price for the day?
A. $70
B. $80
C. $56
D. $66
= i got A
Simplify –6 – (–10).
A. –16
B. 4
C. –4
D. 16
= i got B
Simplify –y – (–y + 4).
A. 2y + 4
B. –2y + (–4)
C. –4
D. 4
= i got C
Given a = –4, b = 5, and c = –1, evaluate | c – a | – b.
A. –2
B. 0
C. 2
D. –8
= i got A
Simplify –6 – 19 + 4 – 8 + 20.
A. –1
B. 47
C. –9
D. 9
= i got C
Simplify –5 – 2.
A. 7
B. 3
C. –3
D. –7
= i got D
Joan took the cab from 36 blocks south of Main Street to 24 blocks north of Main Street. How many blocks did she ride?
A. 12 blocks
B. 60 blocks
C. 50 blocks
D. 14 blocks
= i got B
Simplify 4 – (5 + p).
A. 1 – p
B. –1 – p
C. 9 + p
D. 9 – p
= i got B
Simplify [–4 + (–3)] + [–(–5 + 2)].
A. 4
B. 10
C. –4
D. –10
= i got C
Simplify (2x)(3y)(4z).
A. 24xy
B. 2x3y4z
C. 9xyz
D. 24xyz
= i got D
Is it all correct ?
Thanks !!
Click here to see answer by tutor_paul(519)  |
Question 223734: The price of a company's stock opened at $68, dropped $5, and gained $7 during the course of a day. What was the closing price for the day?
A. $70
B. $80
C. $56
D. $66
= i got A
Simplify –6 – (–10).
A. –16
B. 4
C. –4
D. 16
= i got B
Simplify –y – (–y + 4).
A. 2y + 4
B. –2y + (–4)
C. –4
D. 4
= i got C
Given a = –4, b = 5, and c = –1, evaluate | c – a | – b.
A. –2
B. 0
C. 2
D. –8
= i got A
Simplify –6 – 19 + 4 – 8 + 20.
A. –1
B. 47
C. –9
D. 9
= i got C
Simplify –5 – 2.
A. 7
B. 3
C. –3
D. –7
= i got D
Joan took the cab from 36 blocks south of Main Street to 24 blocks north of Main Street. How many blocks did she ride?
A. 12 blocks
B. 60 blocks
C. 50 blocks
D. 14 blocks
= i got B
Simplify 4 – (5 + p).
A. 1 – p
B. –1 – p
C. 9 + p
D. 9 – p
= i got B
Simplify [–4 + (–3)] + [–(–5 + 2)].
A. 4
B. 10
C. –4
D. –10
= i got C
Simplify (2x)(3y)(4z).
A. 24xy
B. 2x3y4z
C. 9xyz
D. 24xyz
= i got D
Is it all correct ?
Thanks !!
Click here to see answer by jim_thompson5910(35256) |
Question 224097: Simplify 4 – (5 + p) = ?
A) 1 – p
B) –1 – p
C) 9 + p
D) 9 – p
= Distribute the negative (one) into the parentheses, changing it to:
4-5-p
which will equal:
-1-p so i got B .
is it correct ?
Thank you very much !
Click here to see answer by rapaljer(4671)  |
Question 224100: 1 . Which of the following sets is not closed under addition?
A. odd numbers
B. real numbers
C. whole numbers
D. negative integers
= i got A
2 . Which property is illustrated in the following?
5 + 6 + 7 = 6 + 5 + 7
A. commutative
B. associative
C. reflexive
D. transitive
= i got A
3 . Which property is illustrated in the following?
4 + (3 + x) = (4 + 3) + x
A. commutative
B. reflexive
C. associative
D. transitive
= i got C
4 . Is subtraction of real numbers commutative?
A. Yes
B. No
= i got B
5 . When using a number line to simplify 3 + (–6), you start at which point on the number line?
A. origin
B. –6
C. 3
D. –3
= i got A
6 . Simplify (–4 + 6) – 2.
A. 8
B. 4
C. –4
D. 0
= i got D
7 . Simplify –9 + (–3t) + (–21).
A. –12 + (–3t)
B. –33t
C. –30 + (–3t)
D. 12 + (–3t)
= i got B
8 . Simplify [–7 + 3] + (–4 + (–2)).
A. –2
B. –10
C. –6
D. 2
= i got B
9 . Given x = –3, y = 6, and z = –4, evaluate –z + x – y.
A. –7
B. –13
C. –5
D. –1
= i got C
10 . Simplify x + 5 + [–(x) + (–14)].
A. –9 + 2x
B. 19
C. –9 – x
D. –9
= i got A
Is it all correct ?
Thanks ! :)
Click here to see answer by rapaljer(4671) |
Question 224100: 1 . Which of the following sets is not closed under addition?
A. odd numbers
B. real numbers
C. whole numbers
D. negative integers
= i got A
2 . Which property is illustrated in the following?
5 + 6 + 7 = 6 + 5 + 7
A. commutative
B. associative
C. reflexive
D. transitive
= i got A
3 . Which property is illustrated in the following?
4 + (3 + x) = (4 + 3) + x
A. commutative
B. reflexive
C. associative
D. transitive
= i got C
4 . Is subtraction of real numbers commutative?
A. Yes
B. No
= i got B
5 . When using a number line to simplify 3 + (–6), you start at which point on the number line?
A. origin
B. –6
C. 3
D. –3
= i got A
6 . Simplify (–4 + 6) – 2.
A. 8
B. 4
C. –4
D. 0
= i got D
7 . Simplify –9 + (–3t) + (–21).
A. –12 + (–3t)
B. –33t
C. –30 + (–3t)
D. 12 + (–3t)
= i got B
8 . Simplify [–7 + 3] + (–4 + (–2)).
A. –2
B. –10
C. –6
D. 2
= i got B
9 . Given x = –3, y = 6, and z = –4, evaluate –z + x – y.
A. –7
B. –13
C. –5
D. –1
= i got C
10 . Simplify x + 5 + [–(x) + (–14)].
A. –9 + 2x
B. 19
C. –9 – x
D. –9
= i got A
Is it all correct ?
Thanks ! :)
Click here to see answer by jim_thompson5910(35256) |
Question 224261: Which of the following numbers has no reciprocal?
A. 1
B. 0
C. 1
D. 3
Simplify 24(–1/4)(1/2).
A. 72
B. –3
C. –72
D. 3
Simplify 5 + 6(x – 4).
A. –19 + 6x
B. 1 + 6x
C. 11x – 44
D. 6x – 9
Simplify 4(x – 5y) – 3(2x + 6y).
A. –2x – 2y
B. –2x + y
C. 3x + y
D. –2x – 38y
Simplify (1/10)(5x + 2).
A. 2x + 1/5
B. 7x / 10
C. 1/2x + 1/5
D. 2x + 5
Simplify (1/y)(4yx).
A. x / 4
B. 4xy / y
C. 4x
D. 4 / x
= I got B,B,B,A,B and C.
is it all correct ?
Thank you !
Click here to see answer by stanbon(75887) |
Question 224255: 1 . Simplify (63 • 45) – (33 • 45).
A. 1340
B. 1350
C. 1300
D. 1400
2 . Simplify 5 + 8(x – 6).
A. –43 + 8x
B. –1+ 8x
C. 13x – 78
D. –53 + 8x
3 . Simplify (–1)(5)(–2)(3).
A. –3
B. –30
C. 30
D. 21
4 . Simplify 2(3x – 5y) – 3(x – 2y).
A. –9x – 12y
B. 3x – 3y
C. 3x – 7y
D. 3x – 4y
5 . Choose the equation that best represents the following: The sum of three consecutive integers is 24.
A. x(x + 1)(x + 2) = 24
B. x + (x + 2) + (x + 4) = 24
C. (x + 1)(x + 2) = 24
D. x + (x + 1) + (x + 2) = 24
6 . Choose the equation that best represents the following: The greater of two consecutive even integers is six less than twice the smaller.
A. x + 1 = 2x – 6
B. x + 2 = 6 – 2x
C. x + 2 = 2x – 6
D. x + 1 = 6 – 2x
7 . Simplify (–49yx)(–1/7).
A. 7xy
B. 7x + 1
C. –7xy
D. 7y – x
8 . Simplify 12(3/4x + 2/3) – 1/4(8x – 16).
A. x
B. 7x + 12
C. 7x + 4
D. 7x – 12
9 . Simplify 63x / –7.
A. –9
B. 9
C. 9x
D. –9x
= I got B,A,C,D,D,C,A,D and A.
is it all correct ?
Thank you so much
Click here to see answer by rfer(16322) |
Question 224264: 
A. 1
B. –1
C. –3
D. 3
When multiplying several real numbers together, how can you quickly determine if the answer will be positive or negative?
A. The answer is positive if the largest number is positive.
B. The answer is positive if there is an even number of negative numbers.
C. The answer is positive if there is an even number of numbers.
D. The answer is positive if there is an even number of positive numbers.
Simplify 16 • 16 + 4 • 16.
A. 4160
B. 310
C. 330
D. 320
= I got A,B and D
is it all right ?
Thanks !
Click here to see answer by mnamaky(1) |
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