# sally

Newest questions and responses by sally-
## math

Determine if the quadratic functions are positive definite, negative definite or neither: a. y=-2x^2+3x+2 b. 3x^2+x+11 Please show work, thank you!

*asked on February 24, 2019* -
## science

1.what causes a plant to grow into that specific plant is it genetics or environment?

*asked on February 12, 2019* -
## math

claude has 5 1/2 meters of ribbon and uses 4 2/3 meters of it how much ribbons does claude have left in simplest form

*asked on November 18, 2018* -
## social studies

In feudal society, who was responsible for ensuring justice was served and people's homes and lands were protected? A. peasants B. clergy C. lords D. serfs

*asked on November 18, 2018* -
## social studies

1. What sequence of steps did the Spanish follow to establish colonies in America? A. (1) settled towns, (2) formed alliances with native Americans, (3) bought land B. (1) took over territory, (2) settled towns, (3) set up governments C. (1) formed

*asked on November 16, 2018* -
## astronomy

"super earths" are known to have similar densities and compositions to earth but they have a mass 2-10x greater than earth. If one of these super earth's had a mass 5x the mass of earth what would be the super earth's radius ? a) 1.7x earth's radius b)

*asked on October 26, 2018* -
## Math

If the average of five consecutive whole numbers is 18, what is the smallest number?

*asked on October 26, 2018* -
## Math

If the points (4,2) and )-1, k) are on a line that is perpendicular to the line y=2x+1, what is the value of k?

*asked on October 26, 2018* -
## SSAT

A small cube has a length of 2 inches. How many small cubes are needed to make a larger cube whose base has a perimeter of 32 inches?

*asked on October 26, 2018* -
## Biology

Did the ancestral eukaryotic cell with its nucleus and other organelles evolve first and then some eukaryotes got mitochondria or did the ancestral eukaryotic cell have mitochondria, according to SET?

*asked on September 29, 2018* -
## Biology

A. Mitochondria and chloroplasts are similar to bacteria in size. B. Mitochondria and chloroplasts reproduce by dividing, similar to bacteria. Explain how these two options above are supported by Lynn Margulis SET as opposed to Taylor's theory of autogeny.

*asked on September 29, 2018* -
## Philosphy (LOGIC)

Given that A1, ... An are completely incompatible hypotheses, from the fact that the conditional probability of A1 given evidence E is greater than the conditional probability of any other Ai given E, we can infer that: A. The argument A1; therefore E is

*asked on September 19, 2018* -
## Biology

What kind of chemical bond is involved in forming the primary structure of a protein? What type of bond is a peptide bond?

*asked on September 18, 2018* -
## Biology

Can someone please explain to me the biological definition of what alternative hypotheses is? I've looked through the paragraphs in my textbook, however, I still can't seem to arrive at a clear understanding of what the definition is.

*asked on September 3, 2018* -
## Math

First round to the nearest whole number. 9.86 x 9.13 Use compatible numbers to estimate each quotient. 32.2 divided by 7.56

*asked on August 23, 2018* -
## Math

A milk company unconditionally guarantees that an unopened, properly refrigerated container of its milk will be fresh for 5 days after the date stamped on the carton. The company's data shows that unopened containers remain fresh on average for 6 days,

*asked on May 19, 2018* -
## Math

A coin is tossed three times. Determine which of the following outcomes describe mutually exclusive events. a) A: all tosses are heads , B: all tosses are tails b) A: at least one toss is a tail , B: at least one toss is a head c) For both a) and b) find

*asked on May 8, 2018* -
## Math

I am currently doing a question in which the equation is dN1/dt= -N1 + 0.1N1*N2 However, I am able to follow until the step of -N1(1 - 0.1N2) after that I'm not able to follow to the step of (-1)N1 (1-N2/10) Can someone please explain to me how we went

*asked on April 24, 2018* -
## Psychology

Good morning , earlier I had specified that I needed help developing a concept for my essay that has to be written . Briefly I’ll rexplain what I had mentioned in a prior post . I have to write an essay based on a psychology concept . Based on the

*asked on April 17, 2018* -
## Psychology

I have to write an essay on a psychology concept and I was thinking about writing my essay on the concept of conformity. However, my professor prefers that we use media examples that occurred after the 28th of January. This example is to be used to explain

*asked on April 16, 2018* -
## physics

A rifle with a mass of 0.9 fires a bullet with a mass of 6.0 g (0.006 kg). The bullet moves with a muzzle velocity of 750 m/s after the rifle is fired. A. What is the momentum of the bullet after the rifle is fired? B. If external forces acting on the

*asked on April 12, 2018* -
## Chemistry

A solution is 0.20 M in Cd2+ and 0.20 M in Ca2+. NaOH solution is added slowly through a burette. Ca(OH)2 (s) Ca2+ (aq) +2OH (aq) Ksp= 5.5*10^-6 Cd(OH)2 (s) Cd2+ (aq) +2OH (aq) Ksp= 2.5*10^-14 Calculate the concentrations of hydroxide ion, calcium ion, and

*asked on April 5, 2018* -
## CHEMISTRY

A buffer was prepared by dissolving 0.40 mol of benzoic acid (Ka=6.3*10^-5) and 0.50 mol of sodium benzoate in sufficient pure water to form a 1.00 L solution. To this solution was added 30.00 mL of 2.00 M HCl solution. What was the pH of the new solution?

*asked on April 3, 2018* -
## social studies

what negative impact did gold and silver mining have in the west? A. Tent cities near the mines fostered criminals as long-term residents B. ghost towns were left behind after the mines stopped producing. C. mining camps were sources of many contagious

*asked on February 12, 2018* -
## physics

How much work in eV is required to bring three charges of 5.4x10-19C from a great distance apart to 3.76x10-8m from one another (at the corners of an equilateral triangle)?

*asked on January 29, 2018* -
## physics

How much work in eV is required to bring three charges of 6.8x10-18C from a great distance apart to 5.04x10-9m from one another (at the corners of an equilateral triangle)?

*asked on January 29, 2018* -
## Geometry

The captain of a boat is planning to travel to three islands in a triangular pattern where one side of the side island is 75 miles and the other side is 32 miles. What is the possible range for the number of miles round trip the boat will travel? Answer:

*asked on December 13, 2017* -
## Math

The minute hand of a clock is 6 cm long. How far does the end of the hand the hand of the hand travel in 35 minutes

*asked on November 21, 2017* -
## statistics

In a game of dice, the probability of rolling a 12 is 1/36. The probability of rolling a 9, 10, or 11 is 9/36. The probability of rolling any other number is 26/36. If the player rolls a 12, the player wins $5. If the player rolls a 9, 10, or 11, the

*asked on November 21, 2017* -
## Chemistry

At standard temperature and pressure (0∘C and 1.00atm), 1.00mol of an ideal gas occupies a volume of 22.4L. What volume would the same amount of gas occupy at the same pressure and 30∘C?

*asked on October 19, 2017* -
## Math

What are the common and least common multiples of 8&12, 3&5, 7&11, 9&10, 24&36, 20&25, 42&14, 30&12?

*asked on September 8, 2017* -
## Math

What are the least common multiples of 8 and 12?

*asked on September 8, 2017* -
## Math

The expression 3 x n can be written 3n. Use n= 1,2,3 ..., 10 to evaluate the expression. Describe the set of ten numbers. Suppose the sequence continues ror values of n greater than 10. Do the numbers 12, 21, 30 or 210 appeae in the sequence?

*asked on August 28, 2017* -
## Geography

In southwest asia most people live?

*asked on June 6, 2017* -
## social studies

What role did yellow journalists play in the Spanish American War?

*asked on May 22, 2017* -
## Language Arts

All of the following sentences are complex EXCEPT A) Even though acid rain can have damaging effects, few people know much about it. B) Acid rain has been studied as an environmental issue by the government since the 1970s. C) Since they erode statues and

*asked on April 14, 2017* -
## Language Arts

Which sentence uses a participial phrase? A) The fence, which was broken and dirty, looked terrible. B) Shutting out their opponent, the other team celebrated in victory. C) Swimming in the pool all day is my favorite way to spend the summer. D) I am

*asked on April 14, 2017* -
## Geometry

M is the midpoint of AB and N is the midpoint of AC, and T is the intersection of BN and CM. If BN is perpendicular to AC, BN = 12, and AC = 14, then find CT. Diagram is at: goo.gl/j3cBCE

*asked on April 13, 2017* -
## Social grade 7

The Europeans, in order to be successful living in North America, relied heavily on First Nation people. This is best shown by the ...... A. Assistance Europeans received incurring scurvy B. Development of many skills to survive life in the Canadian

*asked on April 11, 2017* -
## Social grade 7

The Irish Potato Famine, unemployment, poverty, and the lack of farmland were some of the reasons why people immigrated to British North America. Thesee reasons are: A. Pull gators of immigration B. Push factors of immigration. C. All in a days work. D.

*asked on April 11, 2017* -
## math

Find the slope of the line through (-9,-10) and (-2,-5) A. -5/7*** B. 7/5 C. 5/7 D. -7/5

*asked on March 28, 2017* -
## Math

Surface area of a square pyramid 11in 13in and 9in 11 height 13 slant height 9 base edge I keep getting the wrong answer its not 328.62 or 294.93 Square area of a cone 15 slant height 12 height 6 base

*asked on March 17, 2017* -
## Math

Sorry for posting twice I have to round 7276.74 by two decimal places but I keep getting it wrong...

*asked on March 17, 2017* -
## Basic Math

Surface area of a square pyramid 11in 13in and 9in 11 height 13 side? 9 base edge I keep getting the wrong answer its not 328.62 or 294.93 Square area of a cone 15 side? 12 height 6 base It's not 365.99 or 417.62 I don't need anything rounded...help

*asked on March 17, 2017* -
## Math

James has set up an ordinary annuity to save for his retirement in 17 years. If his quarterly payments are $650 and the annuity has an annual interest rate of 7%, what will be the value of the annuity when he retires? 650(1+.07/4)^17-1 =.3430281149

*asked on March 6, 2017* -
## Math

Andy has set up an ordinary annuity to save for his retirement in 16 years. If his semi-annual payments are $250 and the annuity has an annual interest rate of 7.5%, what will be the value of the annuity when he retires? How do I solve this equation? What

*asked on March 6, 2017* -
## math

When sixty-five and fourteen hundredths is subtracted from eighty and forty-eight hundredths, what is the difference?

*asked on March 5, 2017* -
## alegbra

what are the next three terms in the sequence? 5,-9,19,-37,75, ___, ____, ____

*asked on January 30, 2017* -
## Algebra

what are the first three terms of the sequence represented by the expression n(n-1)-4? n=1

*asked on January 30, 2017* -
## algebra

Given the function rule f(x)=x^2-5x+1, what is the output of f(-3)

*asked on January 30, 2017* -
## trig

Reiny 2+1/3*tan(theta)=2 How do you get 0? Thanks for your help.

*asked on January 24, 2017* -
## Trig

2+1/3tan(theta)=2 I know that tan=0 0,180 But i don't know how to figure it out. Please help.

*asked on January 24, 2017* -
## Trig

4=5+cos(theta)

*asked on January 24, 2017* -
## Trig

Thank you Steve for all your help.

*asked on January 24, 2017* -
## Trig

Solve equation for 0 less than or equal to theta less than 360. 3-1/5*tan(theta)=16/5

*asked on January 24, 2017* -
## Math (6th grade)

How do I find the answer to 234 divided by 89 + 53 x 72

*asked on January 11, 2017* -
## precalculus

show the correct notation for “The limit of x^2 - 1 as x approaches 3.

*asked on December 21, 2016* -
## precalculus

Show an example where For n odd, the sign of the y-ters differ: (+) for the first expansion, (-) for the second. (For n even, the signs are the same.)

*asked on December 17, 2016* -
## precalculus

Can you give an example as to how The expansion of (x + y)n and (x - y)n are different?

*asked on December 17, 2016* -
## precalculus

How is the expansion of (x + y)n different to the expansion of (x - y)n ?

*asked on December 17, 2016* -
## precalculus

How do you form the the rows of Pascal’s triangle?

*asked on December 17, 2016* -
## precalculus

can you check my answer? Find the coefficient of the term a6b3 in the binomial expansion of the expression (a - 4b)9. ________________________________________ 5,376 344,064 -5,376 -344,064 answer: b

*asked on December 16, 2016* -
## precalculus

Can you check my answers? 1.Find the 5th term in the expansion of the binomial. (2x - 4)8 -458,752x3 286,720x4 458,752x3 35,840x4 answer: d 2.Find the 3rd term in the expansion of the binomial. (x - 2y)12 264x10y2 1760x9y3 -264x10y2 -1760x9y3 answer:a

*asked on December 16, 2016* -
## precalculus

Can you check my answers? 1.Use the Binomial Theorem to expand and simplify the expression. (2 - 3x)3 -27x3 + 104x2 - 36x + 8 -27x3 + 54x2 - 36x + 8 -27x3 + 8 -27x3 + 54x2 - 18x + 8 answer:b 2.Find the 5th term in the expansion of the binomial. (2x - 4)8

*asked on December 16, 2016* -
## precalculus

can you check my answers? 1.Find the binomial coefficient. 12C3 1320 17740800 48 220 answer:d 2.Find the binomial coefficient. (10/7) 720 120 240 172800 answer:b 3.Which of the following is equivalent to 10C6? 6C10 16C10 10C4 10C10 answer:c

*asked on December 16, 2016* -
## precalculus

How would you describe a proof by mathematical induction?

*asked on December 16, 2016* -
## precalculus

Is my answer correct? Which of the following shows the correct first step to prove the following by mathematical induction? 3 + 11 + 19 + 27 + … + (8n - 5) = n(4n - 1) ________________________________________ 3 + 11 + 19 + 27 + … + (8 • 1 - 5) = 1(4

*asked on December 15, 2016* -
## precalculus

Is my answer correct? Find Pk + 1 if Pk = 7 + 13 + 19 + ...+[6(k - 1)+1] + (6k + 1) ________________________________________ 7 + 13 + 19 + …+[6(k - 1) + 1] + (6k + 1) + [6(k + 1) + 1] 8 + 14 + 20 + …+[7(k - 1) + 1] + (7k + 1) 7 + 13 + 19 + …+(6k + 1)

*asked on December 15, 2016* -
## precalculus

Is my answer correct, I am confused by this question? Find the second difference for the sequence. 7, 6, 7, 10, 15, 22, …. 1 2 3 5 answer: 2

*asked on December 15, 2016* -
## precalculus

can you check my answer? 2.Which of the following shows the best next step to prove the following by mathematical induction? n!>2^n, n≥4 1. When n=1 the formula is valid because 4!>2^4 24>16 2.Assuming that k!>2^k show that (k+1)!>2^k+1 (k+1)!=k!(k+1)

*asked on December 15, 2016* -
## precalculus

Can you check my answers? 1.Which of the following shows the best next step to prove the following by mathematical induction? 3^n>n*2^n, n≥1 1.When n=1, the formula is valid because 3^1 1*2^1 3>2 2.Assuming that 3^k>k*2^k a.3^k+1>k+1*2^k+1

*asked on December 15, 2016* -
## precalculus

Can you check my answer? Which of the following shows the best next step to prove the following by mathematical induction? 1+4+7+10 + + (3n-2)=n/2(3n-1) 1.When n=1, the formula is valid because (3*1-2)=1/2(3*1-1) (3-2)=1/2(3-1) 1=1/2(2) 1=1 A. You must

*asked on December 15, 2016* -
## precalculus

Can you check my answers? 1.Which of the following shows the best next step to prove the following by mathematical induction? 3^n>n*2^n, n≥1 1.When n=1, the formula is valid because 3^1 1*2^1 3>2 2.Assuming that 3^k>k*2^k a.3^k+1>k+1*2^k+1

*asked on December 15, 2016* -
## precalculus

Are my answers correct if not which are right? Find the second difference for the sequence. 7, 6, 7, 10, 15, 22, …. 1 2 3 5 answer:a Find first differences for the sequence in order from a1 to a5. Determine whether or not the series is quadratic or not.

*asked on December 14, 2016* -
## precalculus

Find Pk + 1 if Pk = 7 + 13 + 19 + ...+[6(k - 1)+1] + (6k + 1) 7 + 13 + 19 + …+[6(k - 1) + 1] + (6k + 1) + [6(k + 1) + 1] 8 + 14 + 20 + …+[7(k - 1) + 1] + (7k + 1) 7 + 13 + 19 + …+(6k + 1) 7 + 13 + 19 + ...+[6(k - 1) + 1] + (6k7 +1) + (6k + 2)

*asked on December 14, 2016* -
## precalculus

Find a quadratic model for the sequence. -4, -4, -3, -1, 2

*asked on December 14, 2016* -
## precalculus

find Pk + 1 if Pk=2K-1/k!

*asked on December 14, 2016* -
## precalculus

Find a quadratic model for the sequence with the indicated terms. 3, 3, 5, 9, 15, 23, ...

*asked on December 14, 2016* -
## precalculus

Prove the inequality for the indicated integer values of n. n! > 2n, n ≥ 4

*asked on December 14, 2016* -
## precalculus

Find Pk + 1 for the given Pk. Pk = 1 + 6 + 11 + … + [5(k - 1) - 4] + (5k - 4)

*asked on December 14, 2016* -
## Problem solving

Place a counter over the children. Draw the counter. Dont not what im suppose to do though.

*asked on November 10, 2016* -
## Science PLEASE PLEASE HELP

Which of these statements about saltwater is correct? Saltwater freezes at a lower temperature Saltwater freezes at a higher temperature Saltwater does not freeze at any temperature Saltwaters freezing point depends on the temperature of the ocean

*asked on November 8, 2016* -
## Probability & Stats

The probability that Pete will catch fish on a particular day when he goes fishing is 0.8. Pete is going fishing 3 days next week. 1. The probability that Pete will catch fish on exactly one day is: a. .008 b. .096 c. .104 d. .8 Please show work

*asked on November 2, 2016* -
## Math PLEASE HELP!

4^2-(2•2^4) i got -16 if i'm wrong please explain. i also got -240 doing it a different way, PLEASE help!

*asked on October 20, 2016* -
## Algebra 2

Describe the graph of y=1/2x-10 -3 compared to the graph of y=1/x

*asked on October 17, 2016* -
## Algebra2

Does the relation in the table represent direct variation inverse variation or neither? If it is a direct or inverse variation, write an equation to represent the relation. (x,y) (5,2) (10,1) (15,2/3) (20,1/2)

*asked on October 17, 2016* -
## Physics

A 54100 kg space ship has completed two thirds of its journey from the earth to the Moon. At this position, what magnitude force would the ship's engines have to supply to be the equilibrant? Assume the mass of the moon is 7.35E + 22 kg and the distance

*asked on October 10, 2016* -
## Math

[(8^2 - 4) - 6] / 6 = ?? i think it's 59?? idk what the brackets mean. can someone PLEASE explain this to me???

*asked on October 3, 2016* -
## physics

A bullet leaves a rifle with a muzzle velocity of 553 m/s. While accelerating through the barrel of the rifle, the bullet moves a distance of 0.648 m. Determine the acceleration of the bullet (assume a uniform acceleration).

*asked on September 22, 2016* -
## math

a lighthouse is 30m high. the angle of elevation from a ship to the top of the tower is 17 degrees. what is the horizontal distance from the ship to the lighthouse?

*asked on September 20, 2016* -
## Pre cal

Fine a third degree polynomial function f(x) with real coefficients that has 4 and 2i are zeros and such that f(-1) =-50 4 21 -2i (x-4)(x-2i)(x+2i) (x-4)(x2+4) x3-16+4x-4x2 (x3-4x2+4x-16) -50=a(-1-4-4-16) -50=.25 a=2 Not understanding, please help

*asked on September 4, 2016* -
## algebra

The area of a rectangle is 72 cm². The length. l, of the rectangle is 6 cm longer than the width, w. What is the width of the rectangle? 10 cm 8 cm 6 cm 2 cm

*asked on August 26, 2016* -
## math

What is x on a 45,45,90 triangle if the hypotenuse is 145?

*asked on August 24, 2016* -
## physics

An infinitely-long wire with resistivity 2.0*10^-8 ohm*m initially has 1.5 A of "conduction" current flowing through it. When the emf connected to the wire is turned off, this current stops in time of .6ns. Estimate the amount of displacement current

*asked on July 20, 2016* -
## Physics

An infinitely long, solid insulating cylinder with radius a has positive charge uniformly distributed throughout it with a constant charge per unit volume p. a) using Gauss's law, derive the expression for the electric field inside the cylinder ra c)

*asked on June 15, 2016* -
## ALGEBRA

Create a rational function with a linear binomial in both the numerator and denominator. Part 1. Graph your function using technology. Include the horizontal and vertical asymptotes and the x- and y-intercepts on your graph. Label the asymptotes and

*asked on June 9, 2016* -
## Algebra

Create a system of equations that includes one linear equation and one quadratic equation. Part 1. Show all work to solving your system of equations algebraically. Part 2. Graph your system of equations, and show the solution graphically to verify your

*asked on June 9, 2016* -
## Algebra

Scores on a statewide standardized test are normally distributed with a mean of 12.89 and a standard deviation of 1.95. Certificates are given to students whose scores are in the top 2% of those who took the test. This means that they scored better than

*asked on June 9, 2016* -
## History please help!

Who were the first four caliphs? A)rulers who had a personal connection to Muhammad. B) a group of wealthy traders C) five gods D) missionaries to Africa I pick A. Please help!

*asked on May 26, 2016* -
## Walk Two Moons

Has anyone read the story walk two moons? If so, please help. where does Sal BEGIN to realize that her mother is really not returning? A) Lake Michigan B) Madison Wisconsin C) Pipestone Minnesota *** D) Sioux Falls, South Dakota please help, I've read the

*asked on May 14, 2016*