John1

8 markers 3/8 times 2/7 since there is no replacement.. choosing from 7 and we have to assume that we got a red the first time which leaves 2 red.

9 years ago

there are 13 of each type. order doesn't matter combination 4 13 13!/(9!4!) or how many ways can we get 4 spades out of 660 6 diamonds out of 13 13!(6!7!) 1 club would only be 13 ways 2hearts 13!/(11!2!) Multiply all of these answers together to get the n...

9 years ago

Make a rectangle and draw two overlapping circles. in the intersection put the 8 subtract 8 from the 20 and put 12 in one of the pieces of the circle. Then subtract 8 from 13 and place 5 in the other open part of the circle Put the 9 in the rectangle, but...

9 years ago

Always remember when there is an overlap, you have to subtract that overlap from the other numbers.

9 years ago

C. because a high specific heat means that it will take a lot of sunshine to raise the temperature of the water. The water won't get too hot for the fish.

9 years ago

Entropy is the randomness of the molecules. Freezing no Condensing goes from a gas to a liquid. Gas is the most entropy of all 3 states of matter. Looks like it could be B.

9 years ago

30% s the substance and 70% would be the water.

9 years ago

Yes...it is products over reactants.

9 years ago

Is this a right triangle? If so, where is the right angle?

9 years ago

Looks right to me.

9 years ago

b = 3j b = 24 + j 3j= 24 + j 2j = 24 j = 12 b = 36

9 years ago

2000 = 20 x 100 so it is 100 times bigger.

9 years ago

Density = mass/volume suppose: mass = 20 volume is 5 density = 4 volume is 10 density = 2 if the volume is larger than the density gets smaller. However,the question might be asking something different - every object has its own given density and changing...

9 years ago

I do know that similar taxes were already in use in England. It was quite common. I also know that the British were protecting the territories won in the war with the French. I am thinking a and c, but it might be "b" also.

9 years ago

Interest = princ x rate x time I = 24.89 - 15 = 9.89 9.89 = 15 (r) (4) 9.89/60 = rate = .1663 or 16.63% The annual return would be 16.63 divided by 4.

9 years ago

Yes.

9 years ago

How many colors are on the spinner. You have 1/6 chance of getting a two on a six-sided cube. If there are 4 colors on the spinner you would have a 1/4 chance. Multiply the two fractions to get 1/24

9 years ago

1/2 chance of getting a tail 5, 6, 7, or 8 on the spinner that is 4chances out of 8 4/8 or 1/2 Multiply the two fractions 1/2 times 1/2 = 1/4

9 years ago

Use their electronegativies. Cl-Cl would be nonpolar because they will share the electrons equally. C-Cl should be polar.

9 years ago

2/5 two vowels out of five letters 1/4 one vowel out of four letters multiply the two fractions to get your answer.

9 years ago

A triangle: 180 degrees right angle = 90 degrees. 180 = 90 + 11x + 4x 180 = 90 + 15x 90 = 15x Find x and then substitute into 11x and 4x to find the size of the angles. Check your work by adding these two angles to 90 to see if it adds to 180.

9 years ago

10 times .30 = $3.00 10 times .45 = down 4.50 10 times .25 = 2.50 2.50 + 3.00 = 5.50 5.50 - 4.50 = 1.00 buy it.

9 years ago

-3x-3 + 4y + 4 You need a negative on that 3 also, not just the 3x -3x + 4y + 1

9 years ago

Math??

9 years ago

150^2 + 200^2 = c^2 62,500 = c^2 displacement is 250

9 years ago

(17 -8)/3 9/3 = 3 m/sec/sec a) (initial vel - final vel)/time b) distance = avg vel x time

9 years ago

170/6 = distance/60 60(170)/6 = distance 1700

9 years ago

An isosceles triangle has equal sides so they shouldn't be in the ratio of 3:2.

9 years ago

order of operations You work left to right... but do anything in ( ) ist then multiplication/division then add/subtract 5*14 - 48 divided by 12 70 -4 =66

9 years ago

First one looks like there is a difference of 6 so the first number is 6 keep adding 6 to get to 24

9 years ago

2t + 5b = 19 1t + 4b = 14 or t = 14 - 4b 2t + 5b = 19 2(14-4b) + 5b = 19 28 - 8b +5b = 19 can you finish from here? Once you get b... substitute that answer into one of the equations to find t.

9 years ago

Substitute the points into each equation and see if you get a true statement 3(0) -2(-1) = 2 0 + 2 = 2 true now check the second one 5(0) -5(-1) = 2 False. That isn't the point. Keep checking until you find the point that works in each equation.

9 years ago

y = mx + b slope = m = 7 y-intercept = b = -1 y = 7x -1

9 years ago

y = mx + b 5 = 3(1) + b 2 = b and m =3 y=3x + 2

9 years ago

D polar bond. metallic bond forms between metals hydrogen bond forms between hydrogens an ionic bond would form in something like NaCl. polar bond is where they share electrons unevenly. covalent bond is when they share electrons equally.

9 years ago

Correct. Nice work.

9 years ago

substitute in the values given and take the square root of your answer. That will give you the max. safe velocity.

9 years ago

I am not sure what you are looking for? Hours x 12.15 he week day Hours x 12.15 x 1.5 for Saturday hours x 12.15 x 2 for Sunday

9 years ago

She isn't if it said 5/6 and she is doing 2/3 because 2/3 is the same as 4/6 which is different from 5/6

9 years ago

You keep the base and add the exponents in the numerator (x/2)^7 in the denominator it looks like you are raising a power to a power.. so you keep the base and multiply the two powers denominator should be (x/2)^6 I don't know where the 5 is coming from i...

9 years ago

I answered above.. but this is clearer... keep the base and add the powers when multiplying (x/2)^7 When raising a power to a power keep the base and multiply the 2 powers. (x/2)^6 Again when dividing, keep the base and subtract the exponents. I still get...

9 years ago

Can you tell us what you think. Rational numbers are perfect square roots like sqrt of 4 = 2 Rational numbers are fractions Rational numbers are decimals that end or decimals that repeat. We can say anything that can be written as a fraction so the number...

9 years ago

Now... you want to leave only one number to the left of decimal point.. 1.53 x 10^4 It goes to the 4th because I made the number smaller to get into standard form.. so I have to compensate with the exponent. If you had something like... .25 x 10^ 3 the an...

9 years ago

Since both equations = y then they must be equal to each other. x^2 - x-1 = 2 - 3x To solve, you need all terms on one side and zero on the other. x^2+2x -3=0 Factor (x+3)(x-1) = 0 so x = -3 and x = 1 now to find y.. substitute -3 for x in each equation a...

9 years ago

All I did was copy your question and put it into a google search and I got the answer in less than 1 second. You might want to try that when no one is answering here. Try it and see if you get c.

9 years ago

I think I did this one a few minutes ago. Check below.

9 years ago

This is like looking for a common denominator. 1/12 + 1/9 your lowest common denominator would be 36 because both numbers go into 36 If the lowest common multiple is 36 then the other number could be 9.

9 years ago

.004(-300)+.996(46)

9 years ago

x+ y = 9000 .07x + .04y =540 x = amt at 7% and y= amt at 4% x + y = 9000 7x+4y = 54000 -7x -7y =-63000 -3y = -9000 y=3000

9 years ago

12x11 =132 sq. ft 24 inches = 2 feet tiles are 4 sq. ft. 132/4 = number of tiles you will need.

9 years ago

m = (y2-y1)/(x2-x1) m = (-6-(-4))/(7 -4) m = (-6+4)/3 = -2/3

9 years ago

replace x with x+h first (x+h)^2 -4(x+h) minus (x-h)^2 -4(x-h) first - second one divided by h x^2 + 2xh +h^2 -4x -4h -x^2 +2xh-h^2 +4x -4h (4xh-8h)h = 4x-8

9 years ago

Kyd 12/52 chance of a face card or 3/13 chance of any other card is 10/13 (3/13)(4)+(10/13)(-3) North same except change the signs on the 4 and 3. Complete the math and see who gets the higher expected value.

9 years ago

Yes

9 years ago

from noon to 4 is 4 hours 4 x 3 = 12 degrees dropped. 75-12 =

9 years ago

Ratio is 3/2 3/2 = boys/6 boys = 9 3/2 = 21/girls girls = 2/3 times 21 = 14

9 years ago

2L + 2W = P 2L + 2W = 60 L = 2W -3 2(2W-3) + 2W = 60 4W -6 + 2W = 60 6W = 66 w = 11 Can you find L?

9 years ago

csc = 1/sin or 1/csc = sin 15/ sqrt 5 multiply numerator and denominator by sqrt of 6 15 sqrt 5 divided by 5 reduces to 3 sqrt 5

9 years ago

(92 -100)/16 = z-score/ -8/16 =-.5 Now you either have to use a z-table to find the values below -.5 I used a Ti-84 calculator and got .3085. See if you can get this answer.

9 years ago

There are formulas to use to calculate the least squares regression line. I am sure the formulas (long and short cut) are in your text. However, if you are allowed to use a TI-83 or 84 calculator, it will do these calculations for you by using the STAT fu...

9 years ago

D = S -30 5D = 2S S = 5D/2 D = 5D/2 -30 2D = 5D -60 -3D = -60 D= 20 S = 50

9 years ago

Say that you have 5980 divided by 347 Estimate by using 6000/300 = 20 So, I now know my first digit will go into the 10's place or 57890 divided by 34 that is 60,000 divided by 30 = 2000 my first digit goes into the thousands place.

9 years ago

margin of error = z( s/sqrt n) me^2 = (z^2)(s^2)/n n = (z^2)(s^2)/me^2 n =(2.33)^2 ( 10.5)^2 /3^2 n = 5.43(110.25)/9 n = 66.5 so you need 67 people repeat the problem using 1.28 for z.

9 years ago

n + .08n = 11.99 tax = 8% 1.08 n = 11.99 11.10=n tax is .89 lets say the is 6% 11.31 = n tax is .68 they are proportional. The proportion is the tax. try dividing the tax by the n in each case to see that the answer is the sales tax we used.

9 years ago

I did a problem up the page from here and you would do it the same way.

9 years ago

It would increase by 4000. 52,000 + 4000 + 4000 divide by 2

9 years ago

Are you writing inequalities. I am not sure what you are asking y + 4 <1 -5<y<-3 -3<y <5 Can you do the rest

9 years ago

K = 480 + J K= 220 + J + T J = 80 + T J-80 = T K = 220 + J + T substitute from above 480 + J = 220 + J + J -80 480 + J = 140 + 2J 340 = Jack Tim is 80 less or 260 Kevin is 480 more than Jack or 820 Add up the 3 values to get the cost of the present.

9 years ago

5) Study plan is more planning when you are going to study which subjects. 9) Look for main ideas 10) words that begin with the same letter. When looking for information BOLD, maps and diagrams are really important. I agree with all of your other answers.

9 years ago

are you taking the 4th root of what is in the ( ) and then squaring that result? If so, a 4th root and a square results in a square root.

9 years ago

3w + 2c + t = w + c + 5t 2w = 4t -c 2c +t =25 c = 10 so 2(10) + t = 25 t = 5 2w = 4(5) -10 w = 5

9 years ago

No. You have to set this equal to zero. 16t^2 -250t + 500 = 0 Now, this isn't factorable. You have to use the quadratic equation to solve for t to the nearest hundredth. Quadratic x = opposite of b (plus or minus) the square root of( b squared minus 4ac)....

9 years ago

71/100 = x/67 this is called the is over of method Write the % as 71/100 set that equal to is over of We would say 71% of 67 is what? since 67 follows "of" that is on the bottom then the is would be x.

9 years ago

(-2,9) (0, -1) I chose two points (x,y) first I will find the slope: (-1 -9)/(0 - (-2)) = -10/2 = -5 use m = -5 (0, -1) -1 = b y = -5x -1 Check a couple other points to make sure they work.

9 years ago

b = 35-a

9 years ago

1 cm = 10 mm multiplying by 10 is correct. 1000 mm = 1 m it has to be 1000 times bigger 1,000,000,000

9 years ago

You are welcome.

9 years ago

A. 38.50/350 is cost per square foot. divide 825/350 and round to the next higher gallon. square feet / coverage in square feet = gallons needed.

8 years ago

When you round to the thousand that is think about 1000 You want to end up with a number that you could get if you counted by 1000 so think about 1000 2000 3000 4000 5000 6000 When you round to the hundreds place, you would get an answer that is attainabl...

8 years ago

x^2 = 40000 x =200 It is a square so you have 800 feet. g(x) = 800(2.50) + 50 complete the math to see the cost.

8 years ago

m =3h g = m + 35 g-7 =5h g =3h +35 g = 5h + 7 5h+7 = 3h +35 2h =28 h =14 m = 42 g =77

8 years ago

correct.

8 years ago

16/34 or 8/17

8 years ago

9 gallons filled 4/6 or 2/3 12 gallons = filled had 2 gallons

8 years ago

a) 1500/22 b)1500/21 c) (1500 - 22)/1500 can you finish from here? I will check back to see your answers.

8 years ago

y = mx +b 47.72 = 1.75(24) + b 47.72 - (1.75)(24) = b solve for b Then replace m in y = mx + b with 1.75 and the b with your solution from above.

8 years ago

80 - 8h = T h = hour and T = temp

8 years ago

16 crayons per box is less than 24 crayons per box.

8 years ago

Can't see the table.

8 years ago

5-4 divided by 4 1/4 = .25 or 25% Now, check your answer. 1/4 of 4 = 1 added to 4 gets the 5.

8 years ago

I think you are crossing BB with bb each time you will get Bb and since b is recessive, you cannot get a red cow.

8 years ago

Water molecules in liquid would be moving a lot slower than those in water vapor. To be a vapor, the molecules have more energy. Based on this information and the fact that the molecules move around randomly... can you write the short essay about dancing?

8 years ago

Given that he is male means you have to choose from the male column Total in the male column is 4709 does not have a Master's degree. I would assume the other 3 degrees would be okay.... 2023+2225+45 4293/4709 =.9116 or you could find 416/4709 = .08834 wh...

8 years ago

64 -[3 + 28] 64 -31 = 33 Correct do the Mult and the division within the grouping symbols and then the addition before subtracting from 64.

8 years ago

The water evaporated due to the heat.

8 years ago

Direct: y = kx As x increases, y increases distance = rate(time) y/x = k miles/time = rate 100, 5 200, 10 400, 20 800, 40 Inverse xy = k As x increases, y decreases As pressure increases on a gas, the volume decreases. 100 2 200 1 400 1/2 800 1/4

8 years ago

6 + 11 =17 now 3 years from now 9 + 14 = 23

8 years ago

Multiply the 2nd equation by -4 so the y's will eliminate when you add the two equations together. 3x + 8y = - 5 8x -8y = -72 11x = -77 x = -7 find y by substituting into one of the original equations.

8 years ago

w = 3d d = 10 so wife = 30 Man is 4 years older = 34 His daughter was born 10 years ago so he must have been 24.

8 years ago

5x^2 -23x + 12 =0 (5x - 3)(x - 4) = 0 5x -3 =0 x -4 = 0 Can you solve each of these for x?

8 years ago