# Posts by Sara

Total # Posts: 4,580

**math**

Determine whether ?QRS is a right triangle for the given vertices. Explain. Q(18, 13), R(17, –3), S(–18, 12)

**History**

1. In the Lindisfarne Gospels, what symbol represents St. Mark? (The Winged lion?) 2. In the Lindisfarne Gospels, who is the only evangelist who is pictured facing the reader directly? (I think its John) 3.In the Book of Kells, how many evangelists are presented as actual men...

**math**

Determine whether ?GHI is a right triangle. G(-2, 1), H(3, -1), I(-4, -4). Can you please show the steps too? Thank you!

**history**

It says that Al-Andalus is another name for the Iberian peninsula

**history**

is it Al-Andalus?

**history**

is it Reconquista?

**history**

Which European country was controlled by Muslims throughout the Middle Ages, and what year did Christian rulers finally take power away from the Muslims?

**math**

The vertices of a triangle are L(1,3), M(4,0), N(-4,1) LO is a median of the triangle. What are the coordinates of point O? Explain.

**math**

Thank You

**math**

The value of Sara's new car decreases at a rate of 8% each year. 1.Write an exponential function to model the decrease in the car's value each month. 2.Write an exponential function to model the decrease in the car's value each week. 3.Write an exponential function...

**English**

How to re-word this please? The Emmett Till Unsolved Civil Rights Crimes Reauthorization Act of 2016 will be considered by the House on Wednesday, December 7. under the rules. S. 2854 was proposed on April 26, 2016, by Senator. Richard Burr Republican of North Carolina and ...

**English **

How can I re-word this to start my summary ? On Wednesday, December 7, 2016, the House will consider S. 2854, the Emmett Till Unsolved Civil Rights Crimes Reauthorization Act of 2016, under suspension of the rules. S. 2854 was introduced on April 26, 2016, by Sen. Richard ...

**Math**

Give the domain and range of the following functions: f(x) = 1?4x – 7 g(x) = 3x2+ 2

**math**

-2/5x-9<9/10

**Exponential and Logarithmic functions**

Thank you

**Exponential and Logarithmic functions**

A certain material decays at a rate of 1.9% per year. The sample is 260 grams. How much will be left in 11 years? How long will it take to have only a 100g sample left?

**Opreating System**

Hi, i need help with this opreating system homework. Part 1: you need your C program to do the following in order to achieve this desired output. (1) navigate the subfolders of the proc folder looking for those folders holding information about processes in the system. ...

**Opreating System**

Hi, i need help with this opreating system homework. Part 1: you need your C program to do the following in order to achieve this desired output. (1) navigate the subfolders of the proc folder looking for those folders holding information about processes in the system. ...

**Math**

For the following geometric sequence find the recursive formula and the 5th term in the sequence. In your final answer, include all of your work. {-4, 12, -36, ...}

**Biology **

What is a protein that transports ions across the plasma membrane without requiring energy or changing shape?

**math**

i used to take that material last year ,now i forgot it, sorry

**math**

its more physics than math, anyways, i guess but im not sure since patrick left after 30 min, u need to add 30 min on johns arrival time.

**math**

sorry john

**math**

velocity=distance/time to find the time patrick reached

**psychology**

does someone know a good website that includes b.f. skinner in behavioral approach ,or just inform about him?

**Math! Please Help It's Due Today!!!!!**

and then you substitute the point and u'll find b then m+b=* hope im correct

**Math! Please Help It's Due Today!!!!!**

i used to know but now i forgot but i guess i may help you on that if two lines are perpendicular their slope product = -1 line 1:y=-5/8 x-9 a1 x a2 =-1 -5/8 x a2 =-1 a2=8/5 line2: y= 8/5 x +b

**MATH**

A prism has a cross section that is a right angled triangle.its volume is 60 cm^3.What could the dimensions of prism be?

**maths**

Aprism has a cross section that is a right angled triangle.Its volume is 6 cm^3.What could the dimentions of this prism be ? .....cmby..........cmby.....cm(2)

**Physics**

an object of mass m is being weighed in an elevator that is moving upward with an acceleration a. What is the eesult if the weighing is done using a spring balance and a pan balance?

**Math**

How would I go about solving y - 6 is greater than or equal to = 12?

**Math**

y + 5 is equal to or greater than 7 Is y less than or greater than 12? Please check, and help correct.

**Math**

x/4 + 1 = -6 I'm not sure the process to solve the equation, could I have help?

**physics**

If 335 g of water at 65.5 °C loses 9750 J of heat, what is the final temperature of the water? Liquid water has a specific heat of 4.18 J/(g.°C). °C (Answer a number only, no units. Round to the tenth place). This is an example of an endothermic or exothermic ...

**algerbra**

can someone check my work for this question? the question is to graph the function of square root of x plus 2 with the plus 2 not being in the square root my x values were 0,1, 4, 9, and 16 my y values were 2, 3, 4, 5, and 6 the next part says to write the domain and range. ...

**algerbra**

can someone check my work for this question? the question is to graph the function of square root of x plus 2 with the plus 2 not being in the square root my x values were 0,1, 4, 9, and 16 my y values were 2, 3, 4, 5, and 6 the next part says to write the domain and range. ...

**math**

yes, that's what I have. Thank you for checking my work!!

**math**

The question is: the table below lists the total cost for parking for a period of time on the street in NYC. The total cost for any time up to and including the hours parked. For example, parking up to and including 1 hour would cost $1.25; for 3.5 hours parking would cost $5....

**Algebra**

Ms. Sue, I'm sorry! I got these answers for those problems. :\ I didn't post the choices and my answers cause I thought it'd be too much work... 1. x^2 - 12x + 1 2. -4x^2 - x + 15 3. 2x^2 + x + 9 5. m^2 - 2m - 9 6. 14t- 8 9. 64^50 10. x^7 11. 4^36 12. 4^48 14. 1/27...

**Algebra**

I have a few of these questions that I need help on, please help me! 1. 16x^2 + 2 + 2x - 15x^2 - 1 + 14x 2. 2x^2 + 8 8 - 4x + 3x - 6x^2 + 7 3. 2x^2 = 6x - 7x +8 - 3x^2 + 1 5. (m^2 - m - 4) + (m - 5) 6. (5x^2 + x - 3) - (-2x^3 + 4) 9. 64^10/64^5 10. x^11/x^4 11. 4^3 x 4^12 12. ...

**math**

On the set of axes below, graph the function represented by y=cubed root of x-2 for the domain -6< or equal to x< or equal to 10. x column I did -6, 1, 2 , 3 ,10 y column I did -2, -1, 0, 1, 2 Then I plotted these points. Is this correct? Thanks for checking over my work.

**Math**

An employee earns $200 for 14 hours work. Assuming he is paid by the hour, how much will this employee earn in 35 hours?

**math**

my watch is twelve minutes slow .the bus for which I am waiting should have arrived at 3.49pm but it is five minutes late. What time would my watch show when the bus arrives?

**geometry**

Find the lateral area of a regular square pyramid whose slant height is 20 and whose base has an edge length of 7

**statistics**

Recent studies, as summarized, for example, in E. Mortensen et al. (2002). The association between duration of breastfeeding and adult intelligence. Journal of the American Medical Ass o ciation , 287 , 2365–2371, suggest that breast-feeding of infants may increase their...

**Math**

If <1 and <2 are supplementary, then <1 and <2 form a linear pair

**Math**

If <1 and <2 are supplementary, then <1 and <2 form a linear pair

**statistics**

The professor teaching a large introductory class gives a final exam that has alternate forms, A, B, and C. A student taking the exam using Form B is upset because she claims that Form B is much harder than Forms A and C. Discuss how percentile point data might be useful to ...

**math**

ok, corrected is 2x^2+4x+4x+8-4=28 2x^2+8x+4=28 2x^2 +8x-24=0 none of them still work

**math**

This is a multiple choice question. What is the solution of the equation 2(x+2)^2-4=28 1)2 only 2)6 only 3)-2 and 6 4)2 and -6 I did (2x+4)(2x+4)-4=28 4x^2+8x+8x+16-4=28 4x^2+16x+12=28 4x^2+16x=16 This is where I get stuck, can you help? thank you

**math**

thank you so I got 45.95, so approx. 46mph, which is still over the speed limit. Thank you for taking the time to check my long involved problem.

**math**

The equation d=0.12v^2 + 2.1v models the distance d in feet it takes a car traveling at a speed of v miles per hour to come to a complete stop. Graces car was able to stop after 350ft on a highway. If the speed limit in the area was 35 miles per hour, was she speeding? Justify...

**Math**

Michael can travel at 166.35mph in his Ferrari. How far can he travel in 5 hours?

**Math**

Colin lived in Scotland and was going to take his caravan on holiday to France. On the first day he travelled 472.87 miles to Portsmouth. He got a ferry which travelled 73.92 miles. He then got off the ferry and drove 134.56 miles to the camp site. How far did Colin travel to ...

**9th grade English**

Thank-you. I guess I shouldn't complain but I want to challenge myself

**9th grade English**

Sam had to mix __________ parts of the two chemicals for the experiment. a. equaled b. equitably c. equal d. equate f. equation I pick C This seems to easy am I missing something?

**Story section**

Imagine you are an old ragged doll.You have just been thrown away by your owner.Tell the story of what happens to you. Please at least write 4 or 5 sentences to make a start Thank you

**Logic**

Thanks

**Logic**

Which of the following is not like the others? A. 1 B. 22 C. -2 D. 50 E. -94

**Logic**

Thank you

**Logic**

Which of the following is not like the others? A. Mars B. Venus C. Asparagus D. Potatoes E. Computers F. Cheeses G. Chairs H. Pasta

**Maths **

A boy spends 1/4 of his money on sweets and 1/3 on computer games. What fraction of his money does he not spend?

**Trigonometry **

The first three terms of an arithmetic progression are 1/2, x, 25. The first three terms of a geometric progression are x+1/4, 32 1/2, and y, where x and y are positive numbers. Find the value of X and the value of Y.

**MATH**

Jenny is running an experiment for organic chemistry class. She needs exactly 100 ml of 70% hydrochloric acid, but the lab only has 90% and 40% solutions. How much of each solutions does she need to mix in order to obtain 100 ml of 70% hydrochloric acid solution?

**Math**

What is 7 to the nearest hundred?

**MATH!!**

There are two numbers whose sum is 50. Three times the first is 5 more than twice the second. What are the numbers?

**math**

15(5^x-2)=8^2x+1 extraneous root sorry for the re post, i typed it wrong

**math**

given f(x) = x^2 and g(x)= squar root x+4. determine the following compostions and their doamin and range a) f(g(x)) b) g-1(superscript) (f(x)) c) g(f(x)) +g-1(superscript)(f(x))

**math**

log(subscript)2 (x+5) + log(subscript)2 (x-1) =4 find the extraneous root

**math**

The pH or acidity of liquid is measured in pH, where pH is given by the equation pH=- log C, with C being the concentration of [H+] in multiples of M=1mol/L. Suppose you are given a solution of hydrochloric acid with a pH of 1.7 and asked to increase the pH solution by 1.4. ...

**math**

opss i typed it wrong 15(5^x-2)=8^2x+1

**math**

15(5x-2)=82x+1 solve the extraneous root

**math**

A polynomial function function is defined by the equation p(x)=3x3+ax2+bx+7, where a, bE/. If p(-2)=5 and p(1)=14 then the value of a+b is...

**Advanced Functions**

4cos2x - cosx-3 =0 0 to 2pi

**chemistry **

The pH or acidity of liquid is measured in pH, where pH is given by the equation pH=- log C, with C being the concentration of [H+] in multiples of M=1mol/L. Suppose you are given a solution of hydrochloric acid with a pH of 1.7 and asked to increase the pH solution by 1.4. ...

**Advanced Functions**

the compound interst forumla is A= P(1+i)^n. consider the function in the form of y= 100(1+x/2)^20, where y is the compound amount. a) determine the required annual interest rate of investment to the nearest tenth of a percentage of 10 years that will give an amount of $300 b...

**statistics**

the percentage increase in price of four items from what they did a year earlier is 72,108,36 and 96 what is the average percentage increase in price of the four items

**physics**

suppose a car is driven from town A to town B from town B to town C and from town C to town D which have equal distances at average speeds 20km/hr,60km/hr and 120km/hr respectively,what is the average speed for the whole journey

**Advanced Functions**

assume the function f(x) and its inverse f-1(x) are both defined for xer. give a geometric interpretation of the composite function y=f(f-1(x))

**Percentage**

If Safia have 10 percent more cookies than Rohit, how many percent fewer cookies does Rohit have than Safia?

**help math!**

Elisabeti bikes from home to the grocery store and back to pick up in- gredients. On the way to the store, she averages 15 mph. Encumbered by groceries, she averages 10 mph on the way back. What is her average speed for the whole hour?

**help with math!**

Morwen bikes around his neighborhood for an hour. He averages 15 mph for the first 40 minutes, but then he tires and averages 10 mph for the last 20 minutes. What is is his average speed for the whole hour?

**MATH 2**

Elisabeti bikes from home to the grocery store and back to pick up in- gredients. On the way to the store, she averages 15 mph. Encumbered by groceries, she averages 10 mph on the way back. What is her average speed for the whole hour?

**MATH**

Morwen bikes around his neighborhood for an hour. He averages 15 mph for the first 40 minutes, but then he tires and averages 10 mph for the last 20 minutes. What is is his average speed for the whole hour?

**math**

Find two fractions in lowest terms with unequal denominators whose difference is 2/7?

**math**

Sasha is a female my mistake

**math**

In one minute, Sasha takes 43 steps. It takes her 301 steps to travel from her house to the shops. If she leaves home at 10:24,at what time will he reach the shops if he walks steadily?

**Advanced Functions**

The number of bicycles, n, sold at one store in a week is a function of the price, p, in dollars. So n(p) for p > 80. The storeÃ¢â‚¬â„¢s cost, c, in dollars for each bike is a function of the number of bikes the store sells each ...

**math- factoring**

Thank you. I was getting thrown off since the bx is +bx and since x=-13 I wasn't sure if you would change the sign to +13 since the bx was positive.

**math- factoring**

The question is ax^2+bx+c=(2x-7)(x-3) for all values of x, What is the value of b? The teacher went over and said the answer is -13, but I am not sure how she got that. Can you please explain. Thank you! I did the first part (2x-7)(x-3) 2x^2-6x-7x+21 2x^2-13x+21 here x=-13 but...

**Advanced Functions**

Nadia collected the data in the table on the left using a CBR after a ball was dropped. (a) Enter the data into L1 and L2 using a TI-83 Plus. Graph the relation. (b) Without looking at the graph, how do you know that the relation is not linear? (c) Use regression to find the ...

**Linear algebra**

Let L1 be the line passing through the point P1=(?1, ?1, 8) with direction vector ?d1=[1, 0, ?3], and let L2 be the line passing through the point P2=(7, ?11, 14) with direction vector ?d2=[1, 2, ?3]. Find the shortest distance d between these two lines, and find a point Q1 on...

**Algebra**

I have found d, my problem is finding Q1 and Q2 and if you don't want to help it's better not to say anything at all I know how to google thanks!

**Algebra**

can somebody please help me with this question I've spent more than 3 hours on this, still nothing Let L1 be the line passing through the point P1=(2, ?4, ?6) with direction vector ?d1=[1, 0, 2]T, and let L2 be the line passing through the point P2=(?2...

**Calculus**

A bowl is created with circular cross sections so that its radius (in cm) is a function of height (in cm) according to the equation r=4sqrt(h+1). Find the volume of soup that fills the bowl if the bow is 2 cm high.

**Physics**

A thin-walled sphere rolls along the floor. What is the ratio of its translational kinetic energy to its rotational kinetic energy through its center of mass?

**MATH**

1. Show, from the definition, that if A:B::C:D and C:D::E:F then A : B :: E : F.

**HELP MATH**

Mr. Kwon has just enough money to buy only 20 mangoes or only 30 oranges. If he wants to buy equal numbers of mangoes and oranges together, how many of each type can he buy with the money?

**Math**

Mr. Dinkelspiel bought $32.56 worth of stamps. He bought 20 more 19-cent stamps than 50-cent stamps. He bought twice as many 32-cent stamps as 19- cent stamps. How many of each kind did he buy?

**Math**

Mr. Kwon has just enough money to buy only 20 mangoes or only 30 oranges. If he wants to buy equal numbers of mangoes and oranges together, how many of each type can he buy with the money?