# Posts by davis

Total # Posts: 112

**math**

Simplify 4 to the 7th over 5 squared all raised to the 3rd power. 4 to the 10th over 5 to the 5th 4 to the 4th over 5 4 to the 21st over 5 to the 6th 12 to the 7th over 15 squared

**Math**

If you have a line intersecting at (3,6). What equation would represent both lines?

**Math**

you lave a line intersecting at (3,6) what would represent the two lines?

**Math 8th grade**

Corrected the question from earlier If you have a line intersecting at (3,6). what equation would represent both lines?

**Math 8th grade**

What is the equation for this problem

**Math 8th grade**

How would I set up this problem to solve it: Gene offers 30 mins. and 60 mins. driving lessons. He gave 8 lessons that lasted 7 hours. How many 60 minute lessons did he give?

**BIOTECHNOLOGY**

=1/2 [0.2x2x1*2 + 0.2x1x(-2)*2] =1/2 [0.4 + 0.8] =1/2 [1.2] = 0.6

**Government**

so correct answer is house

**Government**

I think it is ( C ) but not sure, can someone verify correct answer Which part of Congress was designed to be more responsive to the citizens? A) Senate B) House C) Both Senate and House D) Neither Senate nor House

**Government**

so is the correct answer ( D )

**Government**

Need help What is the difference between a member of the President’s cabinet and a czar? A)There is no difference. B)Czars are confirmed by the Senate but not cabinet members. C)The President appoints cabinet members but Congress appoints czars. D) Both are appointed by ...

**Gov**

Can state elections go into runoff?

**chemistry**

calculate the molar concentration of 0.1 " AgNO3

**Math algebr**

Desire which property is illustrated by the given statement Which property is illustrated by the equation 3/7 (-17) = - 17 ( 3/7) A. Commutative property of multiplication B. Associative property of addition C. Distributive property D. Associative property of multiplication E...

**english**

Research skills are primarily valued for which of the following reasons

**Physics**

A firefighter with a mass of 52 kg slides down a vertical pole with an acceleration of 3 m/s/s . The acceleration of gravity is 10 m/s/s. What is the friction force that is acting on him

**Science**

Connections here!

**math**

A chocolate cookie recipe that makes 24 cookies uses 3/4 cups of brown sugar. If John wants to make 72 cookies, how much brown sugar does he need?

**government**

3rd amendment?

**math**

a movng company wants to buy a new type of truck and needs to know the volume of the storage compartent before they can decide if they should purchase the truck. What is the volume of the storage compartment? 10ft, 18ft, 8ft, 2ft, 15ft.

**Physics**

A spring with a spring constant k=450.0 N/m is attached to a mass of m=8 kg and stretched -0.5 m from its equilibrium position and released. What is the speed of the block when it is at the equilibrium position?

**health**

people need to reread the question on the test they have because the answers may not be in the same order

**math**

help! what ia 1/4(sin4x)? just to jump start this proof

**AP Chemistry--to DrBob**

Thanks Dr. Bob!

**AP Chemistry--to DrBob**

How do I figure out the Pka value?

**AP Chemistry**

DrBob--How do I determine the Pka value?

**AP Chemistry**

Calculate the pH of a 75.0 ml solution containing 0.85 M lactic acid after the addition of 0.0225 moles NaL (assume a negligible volume change.)

**Chem!!!:/**

Calculate the ratio of NaF to HF required to creAte a buffer with pH=4.00.

**Chemistry**

Your answer is correct.

**PRECALCULUS**

solve: tantheta = sintheta

**psychology**

1.Who came up with the psychosexual stages? *Sigmund Freud Skinner Gardner Lada Gaga 2.Which psychologist tested classical conditioning with dogs? B. F. Skinner *Ivan Pavlov Igor Pavlov Sigmund Freud 3. Explain the difference between operant conditioning and classical ...

**physics**

what is nature of a graph of period against angle

**Chemistry**

Samples of three different compounds were analyzed and the masses of each element were determined. Compound Mass Mass N(g) O(g) A 5.6 3.2 B 3.5 8.0 C 1.4 4.0 If you were John Dalton and had never heard of a mole, which of the following would you think were possible sets of ...

**SCIENCE!!!!!!!!!!!!!!111111**

A unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.

**chemistry**

Use the Molarity Formula Molarity= moles/liters of solution Molarity= moles/0.050 Liters To find moles you have to find the moles of each sample of KBr. SO 1.00M KBR times .025liters =.025moles And then 0.800M KBR times .075liters=.060moles. Then you add the moles of both ...

**science**

1meter=1X10^-9 nanometers 1meter=1X10^-6 micrometers 1meter=1X10^-10 Angstrom 1meter=1X10^6 MegaMeter

**math**

third one is true

**Algebra**

As time passes, the ticket sales get higher. Each time you plug in different values of X, the day tickets go on sale, your Y value increases.

**Algebra**

For D)..... Your parabola should be negative because of the -2X^2. SO the parabola when you graph it is a backwards U. The middle of the backwards "U" has a high maximum so your tickets should be at a peak during the middle of the sale.

**algebra**

I believe you get .0030864. solve what's in the parenthesis first then ^2. turn fractions into decimal format then add them and ^2.

**Trig**

Find the angle of the measure formed by the clock. 2:15

**basic chem**

1)an atom has a mass number of 27 and 14 neutrons. what is the atomic number of this atom? 2)The atomic number of fluorine is 9. What is the mass # of a fluorine atom with 8 neutrons?

**Chem**

oh okay i get it now, thank you! Why did you subtract 1.00 from the abundance though? how do you know?

**Chem**

(79.904)=(80.9163)(0.4931) + x(0.4931) 79.904=39.90 + 0.4931x 40.004=0.4931x x=81.13amu

**Chem**

My teacher said the answer is 78.92 amu and 50.69%. But i keep getting 81.13amu and i don't know how to get the percentage.

**Chem**

Bromine has two natural occurring isotopes (Br-79 and Br-81) and has an atomic mass of 79.904 amu. The mass of Br-81 is 80.9163 amu, and its natural abundance is 49.31%. Calculate the mass and natural abundance of Br-79.

**algebra**

Oh and then you put your equation in slope intercept form y=mx+b. and get -7y=-6x-42 and divide by 7. so your line will be y=6/7x +6.

**algebra**

you plug in zero for x and get 6(0)-7y=-42 and then you get-7y=-42 which is y=6. and then you plug in zero for y and get 6x-7(0)=-42 and then you get 6x=-42 which is x=-7. so your points are (-7,6) and then graph them.

**trig**

5sin^2 270degrees -3cos180degrees-tan(-180degrees) i got -2 but I'm not sure if i did it right?

**math**

That's not possible. But 10^-1 is. You move your decimal to the left for negative exponents and you move your decimal to the right for positive exponents. If you had a value of 1 X 10^-2 for example you would move your decimal two places to the left which would equal .01 ...

**trig**

oh okay! I get it now, thanks!:)

**trig**

How do you know by looking at them?

**trig**

Suppose that 0degrees<theta<180degrees. what is the sign of each of the following? a) cos theta/2 b)sin(-theta)

**Chemistry**

You would use gay-lussac's law. P1/P1 = P2/P2 SO you plug your values in and get... (660 torr)/(20celsius) = (? torr)/(40celsius) .... (26400 torr/celsius) = (20celsius)(? torr) then divide by 20 degrees celsius and then you get 1320 torr as your answer.

**Chemistry**

THE VOLUME WOULDN'T HAVE ANY EFFECT ON THE TEMPERATURE. FOR A GAS IN A CLOSED CONTAINER, WITH THE PRESSURE CONSTANT THE TEMPERATURE DOESN'T CHANGE THE VOLUME. WHEN TEMPERATURE INCREASES, PRESSURE INCREASES. THEY ARE DIRECTLY PROPORTIONAL.

**trig**

Use the appropriate identity to find tan(theta) given that cot theta =0.05.

**trig**

Use trigonometric identities to find sec theta, given that tan theta = Radical 5/ 3.

**trig**

Suppose that 0degrees<theta<180degrees. what is the sign of each of the following? a) cos theta/2 b)sin(-theta)

**Physical Science**

addition&subtraction= round to least number of decimal places multiplication&division=round to least number of significant figures present.

**science**

use conversion factor. 3.5in X 1cm _____ = 1.4 cm 2.54 in. round to two significant figures. answer is= 1.4cm

**english**

Which of the following sentences contains an error? A) The student's attitude did not help her succeed. B) How many students are you planning to hire? C) Student's need to work hard if they want to receive good grades. D) Students' votes are important in ...

**english**

John gave Samuel his hockey stick. In this sentence, Samuel is the ____.

**english**

What is the compound subject of the following? Tamara and Janet served soup and salad at the luncheon.

**english**

Which of the following pronouns shows possession? they - them - her - its

**english**

What is the subject of the following sentence? Please help me figure this out! a. Please b. help c. me d. You (implied)

**english**

Identify the indirect object in the following sentence: Fernando read Miguel a bedtime story.

**math**

(-4)(5)=

**math**

-2-6

**math**

2+3x+4 input x=3 and output y=6

**math**

Can some one please help me I had developed jello brain today. Can some one explain to me why the line x = - 2 is avertical line. and what the slope would be for the line. and why its diffenrence for y = -2 . what would the slope be for y = -2. Please I am sinking here.

**math**

I need to see if i worked this problem right. -8 - -7 =-15 -8+-7=-15 do i add this together aredo i subtract and get -1

**math**

Can any one help me with this problem am having trouble with coming up with the answer. 7-(-1)/3(2)-9/(-3)

**math**

can I trouble any one with this que stion. I got jello brain right now. 7-(-1)/3(2)-9/(-3)

**math**

(-8)2 – 8(2 )= I need help with this problem i have wrecked my brain and havnt came up with the answer

**math**

The ã61 (square root of 61) is between what two whole numbers?I am a little bit losed when coming up with the answer can I trouble you for some help.

**math**

I am having problems coming up with the answer to this problem. Could you kindly help me. It took Amanda 3 hours and 20 minutes to drive from her home to a friend’s house. She then drove to the beach which took her 4 hours and 25 minutes. It only took Amanda 5 hours and ...

**math**

find the median and mean of this numbers 95,75,86,96,70,68,76,81,95,76,69,83,93,88,94 Is the median 83and the mean 83 if i arrange the numbers in ascending order

**math**

- 2.3 – (- 8.9) does it equal -6.6 or x= 2/3=4/6=6/9 x=8/9-6/9=2/9

**math**

11. Place the following set of numbers in ascending order. 20, –7, 5, –5, 12, 4, 15

**math**

Find the five-number summary of the following set of numbers: 349, 243, 119, 363, 246, 505, 263, 221, 324

**math**

Find the median of the following set of numbers. 45, 21, 55, 22, 65, 61

**math**

4-(-3)+1/2-2/(-2)

**math**

16?(-2)+(-4)/2^3+4 How would i work out this problem to get to the soultion

**math**

(-9)(5)/-3

**math**

(-6)^2-4^2 How wouLD I WORK THIS PROBLEM OUT

**math**

-1/2-(-5/8)

**math**

-3.4-(-7.6)

**math**

(-6)2 (-4)2

**math**

soltion for -3( -6)+(4)(-2)

**math**

-9--4

**math**

3/7-6/7,1/7,-1/2,2/7

**math**

1/3+(-5/6)+-1/2=

**math**

What is the population of Europe in 2000? (b) What is the total area of Europe?

**math**

how would you use the concepts from chapter 8 in real life situation? Decribe how these concepts might be useful

**math**

How would you use the concepts from Chapter 8 in a real-life situation?

**math**

Carol has 22% of her pay withheld for deductions. If she earns $680 per week, what amount is withheld?

**math**

. Which pair of fractions is proportional?0.8/0.4=3.2/2.4 or 0.8/0.4=4/2.4 or 0.8/0.4=3.2/2.4 or 0.8/0.4=4/2.4

**math**

Carol has 22% of her pay withheld for deductions. If she earns $680 per week, what amount is withheld?

**Chemistry II**

Answer in Minutes = 63 minutes. Thanks

**Chemistry II**

Spec heat of ice: 2.09 j/(g*deg C) Spec heat of liq water: 4.18J/(g*deg C) Enthalpy of fusion: 334 J/g Enthalpy of vaporization: 2250 J/g