# Posts by marco

Total # Posts: 250

**Math**

What is the area between z=0 and z=2.95

**Math**

Natalie had some marbles. She gave 1/3 of them to her brother, who kept 12 marbles for himself and gave the rest to 5 friends. If each friend received 7 marbles, how many marbles did Natalie have at first? solve

**GRE Question **

the average of 937, 762 and 941 is what percent of their sum?

**algebra word problem**

One year, Shannon made $288 from two investments. $1100 was invested at one yearly rate and 1800 at a rate that was 1.5% higher. Find the two rates of interest

**algebra word problem**

One year, Shannon made $288 from two investments. $1100 was invested at one yearly rate and 1800 at a rate that was higher. Find the two rates of interest.

**Math**

How can you use the doubling strategy for 7x3

**quimica**

In assessing 20.0ml of NaOH 0.175M , calculate how many ml of 0.200M HCl must be added to obtain a pH of 12.55

**Math**

Rachel gave 1/4 of a pie to each of 5 friends how many pies did she give to her friends in all

**Math**

I have no idea

**Chemistry**

Imagine that you have a stock solution with a concentration of 4.6 M glucose (C1). You want to use the stock solution to prepare a diluted solution of 0.22M glucose (C2). You need a total volume of 10mL of 0.22M glucose (V2). What volume of water you need to use for making 0....

**Biology**

Imagine that you have a stock solution with a concentration of 4.6 M glucose (C1). You want to use the stock solution to prepare a diluted solution of 0.22M glucose (C2). You need a total volume of 10mL of 0.22M glucose (V2). What volume of water you need to use for making 0....

**Grammar**

Yes please, I've been struggling with these due to having a developmental disability so any help would be greatly appreciated.

**Grammar**

Can someone correct my answers, please? I really need help! (Underlined words have parenthesis over them, and anything with asterisks by them means that's what I believe the answers are.) 6. Choose the function of the underlined word in the sentence. Call (me) before ...

**Algebra**

Your math test scores are 68 78 90 and 91 what is the lowest score you can iron on the next test and still achieve an average of at least 85

**Statistics**

answer

**Social Studies help**

I don't know if this helps but the answer is C. The book she wants you to read is "Johnny Tremain"

**Math**

The function rule n=0.69p relates the population "p" and the number of "n" these people who used the internet. The number of people who used the internet was 202 million. What was the population? I am so confused, please help me with atleast the first step...

**Chem Lab Help**

Put the mixture in a separatory funnel containing pH9 aqueous solution and Et2O. This way will selectively carry benzoic acid into the water phase, while leaving both amine and aldehyde in the ether phase. Split the 2 phases and work on them separately. Organic phase: add an ...

**Math**

Pat and Kelly went hiking in the mountains. They started at 9,100 ft. They climbed 1,200 ft the first day, descended 900 ft the second day, and climbed 1,000 ft the third day. On the fourth day they descended 800 ft. What was the average altitude at which they hiked?

**math**

Use a graph of f or some other method to determine what, if any, value to assign to f(a) to make f continuous at x = a. HINT [See Example 2.] (If there is no such value, enter NONE.) f(x) = x2 − 18x + 81 x − 9 ; a = 9

**???**

These were kind of confusing.. Steve / Damon, help, again, please?

**Ms. Sue pleeease help**

2.) Line FG contains points F(3,7) and G (-4, -5). Line HI contains points H(-1, 0) and I (4, 6). Lines FG and HI are A. Parallel B. Perpendicular C. Neither 3.) The equation of line GH is y=4x-3. Write an equation of a line perpendicular to line GH in slope-intercept form ...

**Ms. Sue please help**

Line AB contains points A (-8, -4) and B (1, -5). The slope of line AB is A. -7 B. -1/7 C. 1/7 D. 7

**math algebra**

Find the equation in slope-intercept form of the line having m = -2 and b = 4.

**math**

Find an equation in standard form of the line passing through the points (8, -5) and (-6, 2).

**Physics**

d = Vo*t + 0.5a*t^2 = 6 m. 0 + 0.5a*4^2 = 6 8a = 6 a = 0.75 m/s^2. Fnet=m*a Fnet=25*0.75=18.75 N Fnet=Fap-Ff Fap=Fnet+Ff Fap=18.75+3.8=22.55 N W=Fap*d W=22.55*6=135.3 J

**science**

A nonnative species of animal is introduced into a healthy ecosystem. In its new environment, this species has no predators, although it preys on several native animals in the ecosystem. Make a prediction about the biodiversity and health of this ecosystem in the future? A....

**science**

A biologist studying a desert ecosystem observes that the population of a lizard species increases following a particularly hot, dry period that causes a snake population to decline. What could the biologist hypothesize about the roles of these two species? A.The lizard preys ...

**science**

Okay its A? Thank you!

**science**

Thank you that helps a lot! If you can tell me which one it is that would be great!

**science**

I am thinking it is ether A or B. Am I correct?

**science**

which of the following would help decrease the human ecological footprint? A.using bottled water instead of tap water B.using public transportation instead of riding in a car C.buying books instead of borrowing from the library D.using hot water instead of cold water to wash ...

**physics**

A car traveling at 3.2 m/s accelerates at the rate of +0.68 m/s2 for an interval of 8.0 s. Find vf.

**Calculus**

You are creating a rectangular garden and want to surround it with brick edging. You also are going to divide it into two halves with the edging so that your vegetables and herbs are on one side and flowers are on the other. You only have 120 ft worth of brick edging and want ...

**math**

longest multipcation combination for 120 180 and 210

**English**

Thanks. Better? The 1967 film, Guess Who’s Coming To Dinner shows that racial prejudices are very much alive and represent a microcosm of society’s attitude towards interracial relations.

**English**

Is this a good thesis about the film guess who is coming to dinner? The 1967 film, Guess Who’s Coming To Dinner at initial viewing shows that racial relations have come a long way, however, close scrutiny of the film reveals that racial prejudices are very much alive and ...

**Finance**

If I base my decision on present values I’d go with Option B. The PV of Option A is $10,000 as it’s year one and we have $10,000 in hand. If I elect to go with Option B than I receive $20,000 at the end of ten years, assuming 6% discount rate. Via the formula below, ...

**Science --**

If you mixed 25.00g of salt in 100.00mL of water and it all dissolved, what would the concentration be in g/mL?

**Math**

Solve 3cosx+1=2secx

**History**

I have a social studies report that I am working on with other classmates and we are studying about life for teens in the 1920's. and how the use of alcohol was used by teeens. i I have to find a type of journal they may written or how this had affected family life when ...

**History**

Hi can you help me find a website for teens in the 1920's and a journal on it.

**Math**

3x^2(2x-2) I don't know the answer can you help me?

**Science**

If you mixed 25.00g of salt in 100.00mL of water and it all dissolved, what would the concentration be in g/mL?

**Math**

Find product and write answer in scientific notation (3 x 10^6). * (2 * 10^12) I got .6 x 10 ^19 Is this right?

**Math help**

Can you help me with this

**Math**

Find the product write answer in scientific notation (3 x 10^6) * (2 x 10^12) I got. .6 x 10^ 9

**Math 10**

A water sprinkler sprays in a circular a distance of 10 ft. What is the circumference of the spray? I got 31.4 ft. Is that right??

**Math 9**

2 planes leave the airport at the same time. Minutes later plane A is 70 miles due north of the airport. Plane B is 168 miles due East of the airport. How far apart are the 2 airplanes. ? I think 98 miles apart. Is that right?

**Math 5**

A rectangular yard is twice as long as wide the perimeter is 120ft. What are the yards dimensions? W : L : I got. W : 10. And ll: 50 Is that right ?

**Math 4**

Karen is buying wallpaper border for her bedroom Which is 12ft by 13ft. If the border is sold in rolls of 5yards each how many rolls will she need to purchase? 156ft. Divide by 3 is total 52 yrds. So divide by 5 yd 10 for 50 yard.karen would need at 11 rolls is that right?

**Math 8**

A rectangular field is to be fenced completely. The width is 28yd. And the total area is is 1960ydsquared. What is the length of the field ? I got: 70 yd Is that right?

**Math quest3**

The formula for the surface area of a sphere is 4(3.14)r^2. What is the surface area of a ball with a diameter of 6 inches round? Round to nearest inch. I got. 113.04 Rounded is 113 inch

**Math quest 2**

If a triangular sail has a vertical height of 83 ft. And horizontal length of 40 ft, what is the area of the sail? I got area : 3,320ft squared

**Math word problem**

A fire and rescue squads places a 15 ft ladder against a burning building. If he ladder is 9ft from the building how far up will the ladder reach? I got 17.5 ft Is that right?

**math**

During the dinner rush, a certain restaurant cooks about 25 pounds of spaghetti per hour. How many grams of spaghetti do they cook per second?

**Math - Discounts**

A tv is advertised as 20% discount. If the original price is 450.00 what is the new price? Help please

**Math**

A 20 meter ladder is leaning against a house.The bottom of the ladder is 15 meters away from the house. How far, to the nearest tenth, is the top of ladder from the ground? Do I multiply 20,x 15? I don't know how to do the problem

**Math**

A 20 meter ladder is leaning against a house.The bottom of the ladder is 15 meters away from the house. How far, to the nearest tenth, is the top of ladder from the ground? Do I multiply 20,x 15? I don't know how to do the problem

**math**

-10,40,-160

**Math word problem**

Ryan collected 43 candy bars on Halloween he gave 15 of them to his father andhe gave his mother ten less candy bars than he gave his father. Then Ryan ate 4 of the candy bars . Hwo many Andy bars does he have left ? I got 19

**physics**

A pelican flying along a horizontal path drops a fish from a height of 4.7 m. The fish travels 7.7 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s

**physics**

A pelican flying along a horizontal path drops a fish from a height of 4.7 m. The fish travels 7.7 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s

**Word problem math**

Word problem. You cut a 2 m long board into 2 pieces . One piece is 10 cm shorter than the other. How long are each boards.? I got. 1 pc at 80!cm. the other 1pc at 100 cm Is this right ?

**Algebra inequality**

I have to choose a variable and write inequality For less than or equal to I'm using these keys <| Cuz I don't Jon how to show when I type 1. A van can hold a maximum of 8 passengers I wrote V <| 8 V is less than or equal to 8 2. To apply for a job you need to ...

**algebra**

X-5/3 =1 Or X - 5 = 1 ______ 3 I'm trying to type and tell you it's x-5 over 3 equals 1 I don't know how to do I think I have to do reverse operation which is multiply

**algebra**

Word problem. You cut a 2 m long board into 2 pieces . One piece is 10 cm shorter than the other. How long are each boards.? I got. 1 pc at 80!cm. the other 1pc at 100 cm Is this right ?

**algebra**

Ok. I get it know 3/1 *x-5/3. = 1*3 Leaves X-5 = 3 +5 = 3+5 X= 8 So next time I should do what I think which multiple. I just got thrown off cuz of x-5 Thank you

**algebra**

X-5/3 =1 Or X - 5 = 1 ______ 3 I'm trying to type and tell you it's x-5 over 3 equals 1 I don't know how to do I think I have to do reverse operation which is multiply

**ALGebra**

Thank you

**ALGebra**

Can you check 2x + 3 (x-2) -3 (x-6) I got 2x+3x-6 -3x+18 2x+3x-3x= 2x -6+18 =12 Final answer : 2x+ 12

**Algebra. .**

I'm sorry your right I added instead of multiply 60x30=180/2= 90 Dumb mistake. And I had symbol, to multiply originally but I added. Thank you

**Algebra. .**

Can you check 2/3 k = 60 I got:: 3 2 k = 60 * 3 = 90 ________________ 2 3 1 2 = 2 K = 90/2 K = 45

**Algebra pls check**

Sorry should be -2w + 60 = -6w -2w. = -2w 60/-4 = -4/-4w -15= w Is it right now ?

**Algebra pls check**

Is this right ? -2(w-30) =-6w -2w -60 = -6 w +2w =+2w -60 = -4w _____________ -4 = -4 15 = w

**math repost**

name two numbers with decimal hundredth that round to the same whole number but different tenths.

**math 5**

name two numbers with decimal hundredth that round to the same whole number but different tenths.

**math**

name two numbers with decimal hundredth that round to the same whole number but different tenths.

**social studies**

what happenswhen its time to launch the hot air balloon

**math**

16

**Algebra can u help**

Word problem. You buy 6 lb turkey 3 lb coleslaw 4 lb cheese 4 lb turkey 2 lb coleslaw 3 lb cheese. Define and use variables to represent total cost I got.; 6 t + 3t + 4c + 4t +2s + 3c * x Is this right ??

**Algebra**

I don't know how

**Algebra**

Can you check 2z - 3y -8z + y I got : 2z-8z-3y +y = -6z -4y =. -2y

**Pls check math**

3+2(4)-3+4(-3)= I got -4 3+4-2-5+3-6-8= I got I can't figure out I got -17 4-3(2+6) = I got. -20 10/5 + 8+(-3) /5 -4= I got -1

**Math. Algebra**

For. 1. I got. -4 For 2. I can't figure out For. 3. I got. -20 For 4. Igot -1

**Math. Algebra**

3+2(4)-3+4(-3)= I got 4 3+4-2-5+3-6-8= I got -17 4-3(2+6) = I got. -21 10/5 + 8+(-3) /5 -4= I got -1

**Soc studies**

What are the differences between the 1st and 2nd continental congress and their outcome?

**Math**

Can u o Pls help

**Math**

I need to identify property. For r (l) = r Would this be inverse property for multiplication?

**math word problem**

Can you pls help

**math help can someone check**

Can someone. Check

**Declaration of indepen**

In first to paragraphs of declaration. Where do governments get their powerf? I wrote they get their power from the consent of the governed people. Is this correct?

**Declaration of independence**

In first 2 paragraphs. Of declaration. Why are governments set up? Governments are set up to secure the rights of people. Is this correct

**Social studies**

Learning about the declaration of independence The. First two paragraphs. Question 1. What did the colonist feel was. Necessary? I wrote: the colonist felt they must breah their political ties with Britain

**Soc studies declaration of independence**

Why are governments set up? I wrote governments are set up to secure the rights of people. Is. This right answer

**Soc studies declaration of independence**

Can you help what rights cannot be denied? Would it be pursuit of life,libert, pursuit of happiness?

**Algebra**

2 * 7 - 10 / 9 - 4 = I got 7. Is that ok?

**physics**

What is the radius of a communications satellite’s orbital path that is in a uniform circular orbit around Earth and has a period of exactly 24.0 hours (86,400 seconds). (Measurement is from the center of Earth.) G = 6.67 × 10-11 N.m2/kg2 ME = 5.98 × 1024 kg 1...

**Number sequence**

9,3, 1

**Number sequence**

Find the next 3 numbers of this sequence 243, 81, 27.