# Posts by isaac

Total # Posts: 172

**math**

The sum of 8 and y is less than or equal to ?22 .

**Math**

How many positive integers less than 100 and divisible by 3 are also divisible by 4?

**physics**

Cylinder water tank 80cms height 1000liters what is its diameter

**Chemistry**

How Would You Classify The Oxides Of period3A Elemet?

**chemistry**

10.5g of potassium trioxonitrate(v) salt saturated 5g of solvent at 15°c. Calculate the solubility of potassium trioxonitrate(v) salt at that same temperature in: a)g/100g of solvents b)moles per dm^-3

**chemistry**

10.5g of potassium trioxonitrate(v) salt saturated 5g of solvent at 15°c. Calculate the solubility of potassium trioxonitrate(v) salt at that same temperature in: a) g/100g of solvents. b)moles/ dm^3

**Math- Sequences and Series**

Sn= N^2-4n, using this formula find the first 4 terms

**Math**

The width is 2/3x+10 and the height is 1/3x+5 and the next question asks if the perimeter was 90 what would x represent?

**Algebra**

X = 2 Y = -2.5 Slope = 1.250

**math**

The correct answer is D! We know this because 5 goes into 45 9 times, and 5 goes into 70, 15 times! When finding this fact, you can divide 45 by 9, and 70 by 15. If you get the same number, 5, you'll know it is correct!

**math**

C is correct! Like I said when I last helped you, if you divide 25 by 5, and 90 by 18, you will get the same number (5), so that's how you know it is correct!

**Chemistry Solutions**

Commercial Sodium hydroxide has a concentration of 19.4mol/L. How many milliliters of sodium hydroxide solution can be prepared from 59g or sodium hydroxide.

**Math**

The Sum Of Two Consecutive Number Is 39.What Is The Smallest Number

**newton**

the sum of the first 12 terms of an AP is 168.if the third term is 7,find the value of common difference and first term

**Budini ss chem**

Describe the preparation of sodium hydroxide in the school laboratory.

**Chemistry**

How much heat is produced by the complete reaction of 5.29 kg of nitromethane?

**Math**

A watch loses five seconds every one hour How many minutes will it loss in two days

**Math**

Determin x if f(g(x))=0 for the following f(x) = 3x-2 g(x) =5x+5

**Science**

Compare a desert ecosystem and forest ecosystem.

**Math**

Several models of a rectangular cabin are being studied the perimeter of each model is 26 inches the length of one model is 8 inches what is the width of the model

**English**

African slaughter rituals should be allowed in the suburbs?

**geography, math literacy, history and Business**

Which career can I choose

**check english answers please??**

I don't realy think i can answer dix question

**Life Orientation**

In my community there is a serious crime

**Calc 12**

Let f be the function defined by f(x) = (x^2 + 1)e^-x for -4≤x≤4. a. For what value of x does f reach its absolute maximum? Justify your answer. b. Find the x-coordinates of all points of inflection of f. Justify your answer.

**Math**

Elena jogs 7 kilometers west and then 5 kilometers down south. She stops and checks her time. How far is she from her starting point?

**Math**

What figure has six faces, and each face has the same surface area?

**Physics**

A body moving with a velocity at 10 ms collides with a stationery box of mass 100 kg.I f the body has a mass of 50 kg and the two move together after collision.Find their final velocity?

**Physics**

A body moving with a velocity at 10 ms collides with a stationery box of mass 100 kg.I f the body has a mass of 50 kg and the two move together after collision.Find their final velocity?

**basic technology**

a man 80kg carries a load of bricks of mass 20kg up a vertical ladder of length 6m what work has he done

**physics, vector**

three vector f1=2i-3j -4k, f2=3i+4j-0k,f3=3i-j+5k act on a body of mass 40g causing it to displace for 10sec from p1 ( 2,3,7 ) to p2 ( 3,6,7 ). (i) estimate the over all displacement vector. (ii) estimate the resultant force on the body . (iii) what is the distance from p1 to ...

**math**

Pls what is x i beg you

**math**

A square of lawn is surrounded by a path 0.5m wide,,the area of the lawn is 23m^2 bigger than that of the area of the path ,,find the side of the lawn

**math**

A square of lawn is surrounded by a path 0.5m wide,,the area of the lawn is 23m^2 bigger than that of the area of the path ,,find the side of the lawn.

**Science**

How much graphite carbon must be burned in oxygen gas to produce 2.2 grams of carbon dioxide gas

**Trig**

Sorry what do you mean by ^ ?

**Trig**

A ship leaves port at 6 am and heads due east at 20 knots. At 10 am, to avoid a storm the ship changes course to N 47° E.. (47° east of north). Find the ships distance from port at 4 pm.

**business statistics**

A sample of 900 items is taken from a population with standard deviation 15. The mean of the sample is 25. Test whether the sample has come from a population with mean 26.8. Take a=5%

**pioneer math**

last year mr smith's rectangular garden has a width of 4 meters and an area of 24 square meters this year he wants to make it three times as long and twice as wide

**Algebra**

a car salesman works for a monthly wage of $1000 and 10% of his cars sold. Using m for his total monthly income and c for the value of the cars he sells in a month, the equation that shows this is m=0.10c+1000 A. What would the equation be if, instead, he earned 9.5% for every...

**Chemistry**

If I did those two, how would I show the two ions coming to make (NH4)2SO4?

**Chemistry**

Give an example of one polyatomic cation and one polyatomic anion. Show how these ions combine to make a compound. My thinking: Cation-ClO Anion-K How they form, I don't know?

**Chemistry**

So it's used to create a mass for a molecule that doesn't exist, if what I am getting is correct. So by using the ratio between the two elements, especially those in an ionic compound such as NaCl, it's there to give a value to something that never had a value.

**Chemistry**

When is the term, formula unit, useful? Is it when trying to figure out the empirical formula?

**Englishmen**

in 300 word write an essay Nigeria is my country

**mathematic**

Pleasea help me out am stock

**math**

Roger just got a puppy for his birthday. He and his mother will build a fence around an area in the backyard for the puppy to play in. The play area will be 24 square feet. What dimensions could the play area be? Which dimensions would require the least amount of fencing?

**phy 111**

B a d c a a c c d b b a b a d d

**mathematics**

a+2d=14

**AP Calc**

The curve y=x^3 intersects the line y=7x-6 at three points, (-3,-27), (1,1), and (2,8). Find the total area bounded by y=x^3 and y=7x-6.

**AP Calc**

The curve y=x^3 intersects the line y=7x-6 at three points, (-3,-27), (1,1), and (2,8). Find the total area bounded by y=x^3 and y=7x-6.

**Lusaka business and tecnical college**

A uniform rod AB is 2m Long. The rod, which exerts a downward force of 60N at its center, is placed on a knife edge support positioned 0.8m from A. Determine the vertical downward force required at A to prevent rotation.

**math 4th grade**

Lance wants to find the total length of 3 boards. He uses the expression 3 1/2 + (2+ 4 1/2). How can Lance rewrite the expression using both the Associative and Commutative Properties of Addition?

**trig**

two ships p and q left a port at the same time. q sailed on a bearing of 150 while p sailed on the north side of q. after a distance of 8km and 10km by pand q respectively, their distance apart was 12km. find the bearing of p and r

**math**

Explain how to write 3 x 3/8 as the product of a whole number and a unit fraction.

**5th grade science**

what does the statement "the properties of salts are different from the properties of the elements"mean.

**Math**

84

**math**

I spent 2/3 of my money at store A. I spent 1/3 of my money at store B. When I left store B I had $4. How much money did I have when I entered store A?

**Physics**

The horizontal surface on which the block of mass 5 kg slides is frictionless. The force of 29 N acts on the block in a horizontal direction and the force of 58 N acts on the block at an angle(top Right). What is the magnitude of the resulting acceleration of the block?

**chemistry**

state four differences between acid-base indicators and universal indicators

**4th grade math**

Danielle received $32 for her birthday. Three years ago, she received 1/4 as much. How much did Danielle receive three years ago?

**Physics**

A truck on a straight road starts from rest and accelerates at 2.8 m/s^2 until it reaches a speed of 16 m/s. Then the truck travels for 16s at constant speed until the brakes are applied,stopping the truck in a uniform manner in an additional 3.6 s. How long is the truck in ...

**Physics B**

A car, moving along a straight stretch of highway, begins to accelerate at 0.0261 m/s2. It takes the car 48.6 s to cover 1 km. How fast was the car going when it first began to accelerate? Answer in units of m/s Couldn't find a formula for this :(

**Algebra**

A smart phone is on sale for 25% off its list price. The sale price is $149.25. What expression can be used to represent the list price of the phone.

**math**

can u place give pointers on how to draw the graphs of y=2^ and y=-2^ on the same set of axes (4 marks) this new to me

**history**

augustus ruled from__ to___. Where did he rule

**science HELP ASAP!!!!!!!**

100% yay

**Science (please check my answers)**

7. potential energy 8.reducing the friction between the wagon wheels 9.21 10.The wheelbarrow supplied 87.5 J of work.

**Algebra**

factor 4x cubed - 32

**physics**

the length of copper and iron wire is 500m at 0°c. determine the difference in their length at 30°c

**geography**

uoluo

**geometry**

-2

**vector and geometry**

Given that;r-1=6i-8j=2k, r2=4i=5j=7k, r3=2i=j=6k. Find r1,r2.

**Pyhsical Science**

Actually she was being pretentious saying "It's actually D" Giving the guy the wrong answer. I Thank the anonymous user for sharing the facts so i get the right answer.

**Calculus**

How can I prove this series alternating series converges(this is the answer)? (-1)^2*(2/3)^n I tried it this way: an = (2/3)^n, then i just broke it down. 2^n/(3^n) and i took the ratio of it and got 2/3 which does not equal to one which would mean the series diverges.. but ...

**math**

tap a was turned on to till a rectangular tank of 50cm by 40cm by 28cm with water at a rate of 6 liters per minute. after 2 minutes, tap b was turned on to drain water from the tank at a rate of 2 liters per minutes. 6 minutes after tap b was turned on, both taps were tuned ...

**math**

tap a was turned on to fill a rectangular tank of 50cm by 40cm by 28cm with water at a rate of 6 liters per minute. after 2 minutes, tap b was turned on to drain water from the tank at a rate of 2 liters per minutes. 6 minutes after tap b was turned on, both taps were tuned ...

**Calculus**

The question is find the area of the reagion that is bounded by the curve y=arctan x, x=0, x=1, and the x-axis. So I've drawn the enclosed region. To find the area would I use the Disc/shell method? If so the formula that I came up with looks like this: If area = pi(r)^2 ...

**Calculus**

= 1/(3x+5)*d/dx (3x+5) =3/(3x+5)

**Calculus**

There is this improper integral problem I've been given. I've completed most of it but still don't understand what I'd get, I don't quite get what it means to go from 'e' to 'infity'. What would I get? -ln(x)+1/x from 'e' to '...

**physics**

a particle a of mass 2kg and particle b of mass 1kg are connected by alight elastic string c, and initially held at rest 0.9m apart on a smooth horizontal table with the string in tension. they are then simultaneously released . the string releases 12j of energy as it ...

**physics**

s = vt s=3×15 s=45m

**inorganic chemistry**

silt is an example of ........ Hydride

**Math**

Here is the work 10/3x + 4/3 = (7+x)/2x Multiply both sides by 6x: 2*10 + 8x = 3(7+x) 20 + 8x = 21+3x 8x-3x = 21-20 = 1 5x = 1 X = 1/5.

**Math**

It's C

**Arithmetic**

three numbers in an arithmetic sequence sum up to six. if you add 1 to the first number, 2 to the second number, and 5 to the third number, what are the orginal three numbers?

**English**

No its C. I go to Connections academy and just did that test!

**Math**

When M+N=8 and 2R+N=8, what is the value of R? A.16 B.4 C.-4 D.-8 E. It cannot be determined from the information given.

**math**

3 not on the beach

**math**

At a lake, 40 people are water skiing or on the beach. Nine of the 12 people on the beach decide to swim. How many people are not on the beach?

**Ratio**

Ratio in simplest form

**Chem 1**

How can you prepare 2M of 200 ml HNO3 solution from 63% stock solution of HNO3 which has a density of 1.4 g/ml?

**Chemistry**

Molecules of H2: 3 molecules. Nitrogen atoms present: 3 atoms Moles of NH3 formed: 2 moles

**AP Physics**

v=vo +at vo=v v-at vo=9.81m/s - (6.24m/s^2(.3s)) vo=9.81m/s - 1.872m/s vo= 7.44m/s

**Please**

The War of the Roses placed the __________ on the English throne. Lancasterists Tudors Sheffields Bosworths Normans

**History**

well he made plays on this topic so True?

**Math**

The temperature at the top of Mt. Washington one morning was -10 degrees Fahrenheit. With the conversion formula C=5/9(F-32). What was the temperature in degrees Celsius (to the nearest degree)?

**Math**

A=p+prt. Solve for p and t

**Math**

Solve for y and x. x(y+2)=z Please Explain for me

**equations**

decide whether each equation is true or false.For each true equation,write the number property shown by the equation.0+6=6