# Posts by Angel

Total # Posts: 1,151

**HVAC**

Two HVAC/R technicians are discussing the tape used in HVAC/R repairs. Technician A says that cloth duct tape is preferred for use in attics. Technician B says that UL 181 tape is normally required for duct closing systems. Which one of the following statements is correct?

**Math**

Thanks! Neede that

**Math**

Simpilfy the radical expression by rationalzing the denoiminator? 3/sqrt15 a)sqrt45/15 b)sqrt15/5 c)5sqrt15*** d)sqrt3

**Math**

So am I right or wrong I suck at this

**Math**

My secon guess was C

**Math**

What are the solutions of the system? y=x^2+3x-4 y=2x+2 a) (-3,6) and (2,-4)** b) (-3,-4) and (2,6) c) (-3,-4) and (-2,-2) d) no solutions

**Science (soon if so) **

Thank's Student12!

**Science (soon if so)**

Over the years technology has gotten a) smaller**** b) heavier c) less complicated d) more expensive What is nanotechnology? a) Nanotechnology is engineering new elements by changing their atoms***** b)Nanotechnology is a way to lengthen radio waves and improve cell phone ...

**Pre- Algebra**

If you were to roll a fair number cube 120 times, how many times would you expect to roll a 4 based on theoretical probability

**geography**

Explain the effects of the poor service delivery. There must evidence that i actually investigate the poor service delivery physically where possible. Explanation must be with regard to social or Economic or Environmental problem

**Microbes and society **

In Chapter 9 of the Bible, in the book of Exodus, the sixth plague of Egypt is described in this way: “Then the Lord said to Moses and Aaron, ‘Take double handful soot from a furnace, and in the presence of Pharaoh, let Moses scatter it toward the sky. It will then ...

**Algebra **

Check my answer- Solve the system of equations algebraically. Show all of your steps. Y=x^2+2x Y=3x+20 My answer: X^2+2x+3x+20 X^2-x-20 (x-5),(x+4)=0 x=5, x=-4 y=35, y=8 Thank you!

**Maths**

the angles of of evolution of the top of a hill from the City centres of two towns on either side of the hill are observed to be 30Â° and 60Â° respectively. if the distance of hill of the top from the city centre of first is 9 kilometre find in kilometres ...

**Physics**

A 5g bullet is fired horizontally and hits an 8kg block of wood (initially at rest) which can move freely. The wood and the bullet move with a velocity of 0.50 m/s after impact. What is the initial velocity of the bullet?

**Physics**

A 5 gram bullet is fired horizontally and hits an 8 kilogram block of wood (initially at rest) which can move freely. The wood and the bullet move with a velocity of 0.50 m/s after impact. What is the initial velocity of the bullet?

**Math**

The pitch of a screw is the distance between its threads. With each complete rotation, the screw goes in or out a distance equal to its pitch. If the pitch of a screw is 1/17 inch, how far will it go into a piece of oak when it is turned 14 complete rotations clockwise?

**Math**

If a recipe calls for 4 eggs for 8 people how many eggs would it be for 32 people

**Calculus-derivatives**

At what points on the graph of f(x)=6x^2+4x-9 is the slope of the tangent line -2?

**Chemistry **

1.38 mol HCl and 2.9 mol NaOH react accord- ing to the equation HCl + NaOH ?? NaCl + H2O . If the limiting reactant is HCl, determine the amount of excess reactant that remains. Answer in units of mol.

**Chemistry **

1.38 mol HCl and 2.9 mol NaOH react accord- ing to the equation HCl + NaOH ?? NaCl + H2O . If the limiting reactant is HCl, determine the amount of excess reactant that remains. Answer in units of mol.

**Math**

My numerator is 2 less than my denominator I am more than 1/2 what fraction can i be?

**calculus**

define f(x)={x+a if x>2 {-1 if x=2 {ax+b if x<2. How to determine the values of a and b for which f(x) is continuous in the set of real numbers.

**math geometry**

Find the area of the triangle defined by the coordinates (-3, -4), (-7, 0), and (-3, 4).

**science **

Numerical problem : The dimensions of a certain water tank are 8m x 6m x 4m. What is the pressure at the bottom of the tank, if the tank is half filled?

**Math**

If the coefficient of sliding friction for steel on ice is 0.05, what force is required to keep a man weighing 150 lbs moving at constant speed along ice?

**Dynamics**

A level fight bomber flying at 300 ft/s releases a bomb at an elevation of 6400 ft. Approximately how long before the bomb strikes the earth?

**Dynamics of rigid bodies**

a stone is thrown upward with a velocity of 40m/s.Determine the time of the stone when it is at a height of 10m and is moving downwards.

**Chemistry AP**

How many mL of0.4M AgNO3 solution must be added to 200mL of0.4 M NaI in order to for 11.7 grams of AgI precipitate?

**Science**

A lead calorimeter with mass of 150g contains 200g of water. The calorimeter and water are in thermal equilibrium at a specific temperature. Two metallic blocks are placed into the water. One is a 50.0g piece of aluminum heated at 90 degrees celcius. The other has a mass of ...

**math**

Put the following decimals and fractions in order from greastest to least: 0.15, 2/3, 3/5, 0.25, 1 1/8

**Analytical chemistry**

Calculate the expected concentrations of vitamin B6 and caffeine in the stock solution assuming exactly 0.0506 g of pyridoxine hydrochloride (vitamin B6) and 0.1253 g of caffeine are dissolved in a 100 mL volumetric flask.

**Mathematics**

This wasn't there before Sorry But I have a test and I urgently need help

**Mathematics**

The area of one of the faces of the cube below is x^2+2x+1 cm^2. Find an expression in mixed radical form for the length of the interior design. plzzzzzzzzzzzzz helppppppppp on thisssss. On my previous question I even showed my work

**Math**

The area of one of the faces of the cube below is x^2+2x+1 cm^2. Find an expression in mixed radical form for the length of the interior design. Since no one looked at my previous work.................

**Math**

Okay That's makes so much sense. Thank you so much

**Math**

The area of one of the faces of the cube below is x^2+2x+1 cm^2. Find an expression in mixed radical form for the length of the interior design. My Work: Step 1: a^2 + b^2 = c^2 =(x-1)(x-1) x-1 equals to all the sides of the cube Step 2: a^2 + b^2 = c^2 (x-1)^2 + (x-1)^2 = c^2...

**French!**

1-Les images animes(accute accent on the last "e") sont crees(accute accent on all the "e") par les freres Lumieres. 2-Le portrait peint est remplace(accute accent on the last "e") par laphotographie. 3-Les premieres vues aeriennes sont realisees(...

**French**

1- ... sont comuniques(Accute Accent on the last "e") 3-...sont soumises 5-...est lancee(A.A on the second to last "e") 7-...sont perdues 8-...sont seduits

**Business Law**

Can anyone please help? Covenants not to compete (noncompete agreements) are generally legal in most states as a matter of employment contract law as long as: Choose All that APPLY: a. they are not excessive in the amount of time they run b. the hired employee has insisted on ...

**Geometry**

In Parallelogram PARK, angle P = (7x) degree angle A = (3x - 20) degree angle K = (5y - 10) degree. What is x + y?

**math**

Show me how to make $0.60 in two ways,without using quarters or pennies

**Analytical chemistry**

Calculate to four decimal places the mass of pure dry CaCO3 required to make 1 L of a 1000 ppm Ca stock solution.

**MATH**

A dietician is planning a snack package of fruit and nuts. Each ounce of fruit will supply zero units of protein, 3 units of carbohydrates, and 2 unitss of fat, and will contain 20 calories. Each ounce of nuts will supply 2 units of protein, 11 ...

**6th grade math**

If someone can please help me i keep re reading my mathbook I need help i tried I'm unsure: Is there a relationship between area and perimeter? (My answer : yes they both are meadurements one reads the outside and one inside.) Does changing one mean the other one always ...

**algebra**

write an explicit formula for the nth term an for 17,20,23,26

**Math**

Find the quotientshapes to the nearest hundreth. 5.8 divided by 30.8 Is this correct so I round 5.8 to 6 and 30.8 to 31 ?

**6 grade math**

Find the area of the figure at right in at least two different ways. Explain how you get your answer with diagrams and remember to label them with the correct units. So the image is a 10cm by 15cm and smaller box attach to the side. Like an London shape . I think I should just...

**Algebra**

Find all points on the line x = 3 that are 8 units from the point (10,-10).

**Statistics**

Can anyone help me with this? Which of the following statements is true about a 99% confidence interval? a. The interval contains 99% of the population. b. The probability that the population mean is in the interval is 99%. c. The interval is wider than a 95% confidence ...

**English**

When summarizing the of a plot, one should notice the key ideas about how the conflict builds.

**English**

Which are features of myths? Check all that apply. supernatural gods or animals fantastic settings humorous elements that entertain the reader an attempt to explain the origin of the universe characters found in everyday life conflicts between worlds, beings, self, or natural ...

**Math graphs,dot,ven**

I did a bar graph I think it is easier than dot and ven diagram. Am I correct because ven diagram there are no similarities and dot is to long.the problem asks as follows. Display the data using a dot plot,bar graph or vennot diagram.decide which data displays best for ...

**Trigonometry**

find an equation of the line passing throug (2,6) and is inclined at an angle 60 degrees counterclockwise from the horizontal

**analytical chemistry**

Calculate the concentration of the initial nitrate stock solution (in ppm) if exactly 0.361 g of KNO3 is dissolved in a 1 L volumetric flask with distilled water. Here I want the concentration of nitrogen in ppm.

**analytical chemistry**

Calculate the concentration of the initial nitrate stock solution (in ppm) if exactly 0.361 g of KNO3 is dissolved in a 1 L volumetric flask with distilled water.

**math**

How many centimeters would represent 40 kilometers if you were using a scale of 1 cm = 1 m? 1 cm = 1 m 40 km = X x = 1 x 40 x = 40 cm

**math**

Thank you!

**math**

What distance on the ground does 5 inches on a map represent if the scale is 1 in. = 1.5 mi.? 1 inch = 1.5 miles 5 inches =X x- 1.5 x5 x= 7.5 miles

**geometry**

if one of the two vertical angles has a measure of 3x and the other has a measure of 5x - 80. Find the measure of each.

**physic**

Somehow two students managed to open two windows at the library. Student A is 17 m above the ground and Student B is 23.5 m above the ground. At the same time that Student A drops a ball, Student B throws a ball straight down at an initial speed of 7.36 m/s. At what height ...

**physic**

Somehow two students managed to open two windows at the library. Student A is 17 m above the ground and Student B is 23.5 m above the ground. At the same time that Student A drops a ball, Student B throws a ball straight down at an initial speed of 7.36 m/s. A. At what height ...

**Math**

5x -7(2-4x)

**Accounts**

Owner Started a business investing $11,000 and $7,000 equipment. how do i record this

**math**

two numbers are reciprocals of each other and whose sum is 3

**chemisrty**

an object has a mass of 123 g and volume of 17cm3. calculate the density of the object

**algebra**

The denominator of a fraction is 2 more than the numerator.If 1 is subtracted from both numerator and denominator,the result in fraction has value of 1/2.Find the original faction.

**math**

how to put 2/3,1/2,4/5 and 7/30 in ascending order

**Math**

A balloon 150 meters from the observer is rising vertically at constant rate. After 1 minute the angle of elevation is 28 degrees and 29 minutes. What is the angle after 3 minutes?

**math**

Sam has two bags of nuts; one with 77 % peanuts, and the other with 29 % peanuts. To make a 9 lb bag of 44 % peanuts, how much of each should Sam use?

**management**

what are the 10 most otstanding businesses in the philippines? who are the 10 most outstanding managers in the philippines? contributers of management?

**Reading**

The answer is D.

**math**

Using the formula, compute the true annual interest rate. Loan amount = $9,500 Monthly payments = $227.50 Time of loan contract = 5 years True annual interest rate (to the nearest tenth) = _____.

**math**

Ashley is having a pizza party she invited 11 friends. She has 1 3/4 of a pizza. How much pizza will each friend get?

**science**

The intermoleculer forces of water are greater than of methylated spirit

**algebra with pizzazz**

h Egg wvvvwvs by ye b a lot of fun to watch. I will be able, and the other day I was a good idea, but it would be great. The only way to the next day. The only

**life orientation**

the road users and risk they face

**Life orientation**

identify three human rights violations or discrimination and explain in an introductory paragraph why you choose the specific human right violation or discrimination

**Algebra**

Justine earned $26,000 during the first year of her job at city hall. After each year she received a 3% raise. Find her total earnings during the first five years on the job.

**grade 7 mathematics**

A bag contains 14 green tiles, 10 red tiles, and 16 blue tiles. What is the theorectical probability that you will randomly select a blue tile?

**History**

What are two important ways in which the mind and behavior of the non-conventional white-collar criminal are similar to the mind and behavior of the conventional street criminal, and what are two important ways in which they are different?

**math**

A 10-foot ladder is leaning against a wall. The base of the ladder is 2 feet from the base of the building. How far up the building does the ladder fall?

**Math/Precal**

Given sinA=3/5 and cosA=5/13, find sin2x

**Math**

This is similar to a question i seen below but how do i write cos^2 4-sin^2 4 as a single trigonometric function? And 1-2sin^2 3

**Social Studies**

Hawaii island

**Chemistry**

Are these isotonic hypertonic or hypotonic. 1.5% w/v NaCl 5.0% w/v glucose 0.55%w/v NaCl And why??

**4grade math**

Hmmm, are there any multiple choice answers for this question or is it an essay question?

**Science**

Seriously, all you have to say is "Nope"? No explanation or anything to help me? I am so sick of this and the fact that it took someone 5 hours and 20 minutes to answer my questions is freaking messed up! But, luckily I got a 17/19 and my essay questions need to be ...

**Science**

When are tides in earth's oceans the highest? A. during the moon's waning gibbous phase. B. during the moon's waxing gibbous phase C. when the moon is at a right angle to the sun*** D. when the sun, Earth, and moon are in line

**Georgia state history**

Clark you are not dumb. People make mistakes, lol. I agree that it's B

**Math look for patterns**

Marvin counts six $5 bills. Write each value that he counts. What patterns do you see in the ones digits of the values he counts?

**Language arts .**

Yea, I chose "The Maze runner for mine. Choose something that excites you or really gets you interested.

**Language Arts**

Thank you

**Language Arts**

What is the main message of the words that the Statue of Liberty speaks in "The New Colossus" by Emma Lazarus? Key: *** is my answer A. I am a tired, old woman, but I am still strong. B. Welcome to needy immigrants in search of a new home.*** C. America is a beacon ...

**History**

What are the various philosophies on the growth of organizations during the late 19th century? with utilization of workers and farmers

**math**

at a local sports event students paid $3.00 each and non students paid $5.00. There were 120 more students at the event than non students. if the total receipts were 2960 how many tickets of each were sold?

**Physics**

An airplane flying horizontally 1000 meters above the ground at 200 km per hr drops a bomb on a target on the ground. Determine the acute angle between the vertical and the line joning the airplaod and target at the instant when the bomb is released.

**5th grade math**

Which digit is 1/100 of the value of the underline digit in 45,258 (4 is underline)? I think it is 40thousand

**5th grade math**

The value of technology digit 9 in 794,256 is__________ times the value of 9 in 12,276,459. (Think it is : 90,000×12,276,459) Is this right I tried multiplying I get crazy numbers though

**Math**

What numberhas a place value of 3 that is 100 times the place value of 3 in 12,583? Circle all the answers that apply : 2,385 or 3, 257 or 13,548328 or 7, 385 . (I think it's 7, 385 because it moves forward I'm not understand correctly the question)

**Math**

1.Celeste ran 2 1/4 mile on Tuesday and 1 1/2 mile on thursday. How many mIles did she run in all. ( I think it's adding the fractions? ) 2. Mr.Sam took 5/8 of a box of snaks and shared with 4 students.what fraction of the box of snake was shared by the students. ( is it ...