# Posts by Libby

Total # Posts: 118

Algebra
suppose a,b,c and d are different positive integers whose sum is 100, and a-c=5. what is the greatest possible value of ab-cd?

math
You and your friend are selling tickets to a charity event. You sell 7 adult tickets and 16 student tickets for \$120. Your friend sells 13 adult tickets and 9 student tickets for \$140. What is the cost of a student ticket?

Math
How many times greater is the value of the digit in 1 in 183,607 than the value of the digit in 1 in 362,105, can someone help

Crestwood
A bag contains 3 yellow, 4 white, and 8 blue marbles. How many samples of 2 marbles are possible?

Literature
12. When does the Narrative of Sojourner Truth take place? A. Before the Civil War* B. Right after the Emancipation Proclamation C. After the Civil War D. During the Civil War I think I got the answer - can you double check for me? Thanks!

ALGEBRA /116
Solve the inequality -5x/7-2>-1 1.x<4.2 2.x>4.2 3.x<-1.4 4.x>-1.4

algebra/116
Which set of points are on the line y=6x-6 1.{(0,-6),(12,3)} 2.{(0,-6),(3,12)} 3.{(-6,0),(12,3)} 4.{(6,0),(3,12)}

Fiance
If you take out an \$8,400 car loan that calls for 36 monthly payments starting after 1 month at an APR of 9%, what is your monthly payment?

math
Solve sec to the power of 2 times x minus 1 = 3, x such that [0,2pi).

math
yes

math
The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 165 and a variance of 9. The material is considered defective if the breaking strength is less than 157.8 pounds. What is the probability that a single, randomly selected piece...

chemistry
A mixture of ammonia and oxygen is prepared by combining 0.330 L of NH3 (measured at 0.710 atm and 22°C) with 0.200 L of O2 (measured at 0.740 atm and 51°C). How many milliliters of N2 (measured at 0.740 atm and 100. °C) could be formed if the following reaction ...

math
Give the probability in decimal form (correct to two decimal places). A calculator may be helpful. Last semester, a certain professor gave 15 As out of 396 grades. If one of the professor's students from last semester were selected randomly, what is the probability that ...

math
An oil-drilling company knows that it costs \$25,000 to sink a test well. If oil is hit, the income for the drilling company will be \$405,000. If only natural gas is hit, the income will be \$125,000. If nothing is hit, there will be no income. If the probability of hitting oil ...

science
if a man weighs 950 n on earth what would he weigh on allthe other planets in the solar stystem?

math
Evaluate the expression. 11! 6! 4! 2! 3! 1!

math
Tarot cards are used for telling fortunes, and in a reading, the arrangement of the cards is as important as the cards themselves. How many different readings are possible if five cards are selected from a set of nine Tarot cards?

math
The atmospheric pressure P in pounds per square inch (psi) is given by P = 14.7 e−0.21 awhere a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 11.11 psi, what is its altitude? (Recall that 1 mi = 5,280 ft.

math
Let U = {9, 10, 11, 12, 13, 14, 15}, A = {9, 10, 11, 12}, B = {9, 10, 13, 14}, and C = {11, 13, 15}. List all the members of the given set. (Enter your answers as a comma-separated list.) (A ¾ B) ¿ C

Math 221
2 5 - / - 9 12 /-means divided by What is the simplest form?

Math 221
What is the simplest form?

Math 221
2 5 - / - 9 12 / is divided by

Math 221
It should be 60%

Math 221
A chess club with 55 members is electing a new president. Ali received 33 votes. What percentage of the club members voted for Ali?

Math 221
How do simplify 0.05(0.3m + 35n) – 0.8(-0.09n – 22m)

Math 221
Can you break it down for me to understand it better

Math 221
How do I simplify 2w – 3 + 3(w – 4) – 5(w – 6)

Math 221
How do I simplify 2a(a-5)+4(a-5)

algebra
The perimeter of a rectangular painting is 354 centimeters. If the width of the painting is 79 centimeters, what is its length?

Math
The perimeter of a rectangular painting is 354 centimeters. If the width of the painting is centimeters, what is its length?

Math
An isosceles triangle has an area A, an apex angle 2 theta, and a height of h. Determine an expression for theta in terms of A and h.

Biology
In snapdragon plants, neither one of the petal colors is dominant to the other. The hybrids have a intermediate phenotype. If a homozygous red flower is crossed with a homozygous white flower, What will the offspring’s phenotype be?_____________________________ (Use C for...

Math
If a an b are nonzero constant, simplify {√3 a sin (pi/b)}^2 + {√3 a cos (pi/b)}^2

Math
in triangle PQR, PQ=5.4, QR=3.6, and PR=6.2. to the nearest tenth, what is m<R?

Geometry
What translation rule can be used to describe the result of the composition of T<-5,-3>(X,Y) and T<-7,-1> (X,Y)? A. T<12,-4>(X,Y) B. T<-12,-4>(X,Y) C. T<2,-2>(X,Y) D. T<-4,-12>(X,Y)

Math
Use a translation rule to describe the translation of triangle ABC that is 8 units to the right and 2 units down.

Math
Find the circumcenter of angle EFG with E(4,4), F(4,2), and G (8,2).

Math
If triangle MNO is congruent to triangle PQR, which of the following can you NOT conclude as being true? A. line NO congruent to QR B. angle N is congruent to angle Q C. line MN is congruent to PR D. angle M is congruent to angle P

Geometry
Write an equation in slope-intercept form of the line through points S(-7,-6) and T(10,8).

math
what is 2/3 divided by 3

math
Thank You so much Miss Sue and Steve Have a Merry Christmas :)

math
Judy has 3/4 yards of yarn. For each scarf she makes, she needs 1/2 yards of yarn. Does she have enough fabric to make 2 scarfs? I say no because 3/4 divided by 1/2 = 1 1/2 am I right

science
why is Denver Colorado weather different then western new York?

math
thank you

math
Original Question is: how many 1/2 miles are in 12 miles? write the division question 12 divided by 1/2= 24 what multiplication question could the model also answer? 12 x 2 =24 This is the one I didn't understand Write the question given as a multiplication question?

math
There is a winter storm and the snow is falling at a rate of 4 inches/hour. Write 3 equivalent ratios associated with the following rate 4/inches/hour. How many inches will fall between 8pm and 12pm? I haven't a clue

math
5 CUPS EQUAL HOW MANY PINTS (x1pt/2c) I thought 10?

Math
Thanks every one :)

Math
WHAT WOULD 18/100 BE IN RATIO FORM, I THINKING 18:100 BUT NOT SURE?

Ok thank you this really helped sorry for all the questions!

So what would be a plan for converting all of the United States to metric as opposed to standard?

Also why don't we accept the Metric System as it in now used in other countries?

Science
Oh thanks this helped a lot!

Science

Science
Why can't companies make standard measured products to sell within the USA and make metric measured products to sell outside the United States?

Algebra
The perimeter of a rectangle equals the sum of its lengths of its 4 sides. If the width of a rectangle is 4 inches and its perimeter is 38 inches, find the length of the rectangle.

Geometry
Forest rangers use degree measure to identify directions and locate critical spots such as fires. A forest ranger at tower A observes smoke at a bearing of 149 degrees (clockwise from the north) while another forest ranger at tower B observes the same smoke at a bearing of 250...

Algebra
If a trend line has equation y = -2x + 5, what type of association would you expect the data to have?

Algebra
Need help rewriting this as a decimal. 5*10^3 + 2*10^2 + 4*10^-1 = If you can please show me how to do this that would be so helpful!

Math/Algebra
Need help rewriting this as a decimal. 5*10^3 + 2*10^2 + 4*10^-1 = If you can please show me how to do this that would be so helpful!

Math/Algebra
If the first term of a finite geometric sequence is .4 and its ratio is .3 what is the sum of the first 5 terms?

chemistry
What is the formula for barium chloride

Math
How many different arrangements of seven letters can you make if you have seven distinct letters

Math
I need help solving a problem, I am stuck on this one. Write 128 in each one of the following bases a.Five b. Two c. Twelve

Algebra
You invested \$1 0,000 on two stocks paying 8% and 10% annual interest, respectively. At the end of the year, the total interest fiom these investments was \$940. How much was invested at each rate?

Algebra
Two trains start from the same place at the same time. They travel i~ opposite directions. One averages 60 miles per hour and the other averages 80 miles per hour. After how long will they be 420 miles apart?

distributive property
5x+5y rewrite the expression as a product using parentheses

SUBSTANCE ABUSE COUNSELOR
Need some help to do an essay on substance abuse

science
A 6.90 kg penguin runs onto a huge sheet of frictionless Arctic ice. At t=0 it is at x=0 and y=0 with an initial velocity of 0.47 m/s along the positive x-axis. It slides while being pushed by the wind with a force of 0.49 N directed along the positive y-axis. Calculate the ...

Pre Calculus
Its actually 3 people, we need help with our hw , please and thank you

Pre Calculus
FACTOR COMPLETELY 1) x^8-y^8

Law
, list two pros and two cons of Uniform Crime Report (UCR) data and two pros and two cons of self-report data.

algebra
As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. a. The sales representative here tells you they also have two floor plans available, but they only have 38 homes still for ...

algebra
1. Imagine you are in the market for a new home and are interested in a new housing community under construction in a different city. a. The sales representative informs you that there are 56 houses for sale with two floor plans still available. Use x to represent floor plan ...

physics
A proper lifetime of a certain particle is 100.0ns. a) How long does it live in the lab frame if it moves at V=0.960c? b) How far does it travel in the lab during that time? c) What is the distance travelled in the lab frame according to an observer moving with this particle.

physics
A proper lifetime of a certain particle is 100.0ns. a) How long does it live in the lab frame if it moves at V=0.960c? b) How far does it travel in the lab during that time? c) What is the distance travelled in the lab frame according to an observer moving with this particle.

Science

Algebra
there are 3 corners in a triangle. one is 44 degrees, another is 4x degrees, and the other is (2x+16) degrees. find the value of x

what is the word equation for ... The reaction between iron metal and oxygen gas making soild iron oxide ?

Enthalpy Chemistry
THANK YOU! yes, i got 11180, i see what I did wrong.

Enthalpy Chemistry
Can someone make sure I did this write! What is the molar change in enthalpy when 100 g of ice is heated from -18.2 C to -72 C (Cp = 37.4 J/K*mol) 100g of ice = 100 g/-18.2 C = 5.56 mol 5.56 mol * 37.4 J/K * mol * 53.8 K = 1118 J

trig
Find all values of [theta] in the interval 0°<=X<= 360° that satisfy the equation cos2[theta]-cos[theta]=0

algebra
Find a common denominator, that is, multiply all fractions by x/x, then put the like terms together, and simplify:)

math/trigonometry
halve the middle term, then square it, then balance the equation by adding it to one end of the = side and subtracting it from the other. Then get everything over to the left side so you have 0 left again on the right side, simplify, and factor. After factoring, take the two ...

chemistry
okay so its (710)(500)/(303)=p2(27)/1073 then i multiply?

chemistry
im confused on what numbers need to be plugged into the equation

chemistry
An ideal gas is contained in a cylinder with a volume of 5.0 102 mL at a temperature of 30.°C and a pressure of 710. torr. The gas is then compressed to a volume of 27 mL, and the temperature is raised to 800.°C. What is the new pressure of the gas?

chemistry
An ideal gas is contained in a cylinder with a volume of 5.0 102 mL at a temperature of 30.°C and a pressure of 710. torr. The gas is then compressed to a volume of 27 mL, and the temperature is raised to 800.°C. What is the new pressure of the gas?

science
why are the hydrogen atoms in a water molecule are attracted to Cl− ions in sodium chloride (NaCl)?

chemistry
How many moles of carbon are needed to react with 5.01 mol SO2? How many moles of carbon monoxide form at the same time that 0.255 mol CS2 forms? How many moles of SO2 are required to make 125 mol CS2?

chemistry
How many moles of chlorine are needed to react with 3.30 moles of aluminum?

math
for ax^2 + bx + c with gradient 4x + 2 and a stationary value of 1 find a b and c and nature of point i think that its a minima and that its 2x^2 + 2x +2 but im not sure can someone check this please

chemistry/physics Urgent!!
how do i calculate the substrate concentration needed relative to Km to produce a rate relative to Vmax which is 0.1 x Vmax ?? I think i need to manipulate the michaelis menton eq but when i do it im left with [s] in the amount please help lib

organic chemistry
is an α,β-Unsaturated ester CH2=CHCO2Et more or less reactive than an CH2=CHOEt in electrophilic addition and where do the two slot into the reactivity order of CH2=CH2 < CH2=CHMe < CH2=CHBr i think CH2=CHOEt is more reactive than the Br equivalent but im not ...

intermediate algebra
its given coordinates which are in the form of (x,y) for the equation given ie x=5 and y = 1 so for q 2 if x= -3 y = 4-(3x(-3)

math
how do i simplify this further x^2/sqrt(x^2+y^2)+y^2/sqrt(x^2+y^2)

geometry
Katie is 100 cm tall and is standing so that her mother's shado covers her shadow. She is 90 cm from her mother and her mother's shadow is 225cm long. How tall is her mother?