# Posts by Steve

Total # Posts: 54,363

**Advanced Algebra**

Joanne and Bill are financing $305,500 to purchase a house. They obtained a 20/6 balloon mortgage at 5.75%. What will their balloon payment be? $206,311.68 $401,524.25 $152,285.77 $249,295.69 My answer is the 4th one.

**Math**

oranges/800 = 9/40 = 180/800

**Math**

.0175*68000 + .118x = .075(68000+x)

**math help asap**

the degree is the sum of the exponents. So, -x^4y^3 is degree 7 and yes, the 1st one is a monomial. polynomials have terms separated by + and - signs.

**Algebra**

D = 0.40A A = D+E = 0.40A+E so E = 0.60A N = 0.75E = 0.45A S = 5.2A N/S = 0.45/5.2 = 45/520

**Math**

since AD=15 and AB=12, I'd say you have A-12-B-3-D Now, if C is 4 to the left of B, we have A-8-C-4-B-3-D So, choice (D)

**Algebra 1**

There are lots of useful calculators online, such as this one: https://ncalculators.com/statistics/linear-regression-calculator.htm

**Algebra 1**

42

**Math**

Heck. Just draw any triangle, and label one side 5.6 I suspect there is more to this little problem ...

**Math**

Nah. Where did you get the 40? 50 * 5/6 = 250/6 = 125/3 so, you have a genuine GP, with a = 72 r = 5/6 So, S = 72/(1 - 5/6) = 72*6 = 432

**math**

I'd say 5 * 3/8 = 15/8 lbs or, ...

**maths**

since two sides are equal, you must have one of 4b=6b-2a+1 4b=a+2b 6b-2a+1=a+2b which can be simplified to 2b-2a = -1 a-2b = 0 3a-4b = 1 also, using the perimeter, 4b + 6b-2a+1 + a+2b = 28 12b-a=27 so, see how the perimeter equation can be matched with one of the others to ...

**Math**

312.5/625 = 0.5 = 50%

**Math**

5/8 + 1 7/9 + 3 45/72 + 1 56/72 + 3 4 101/72 5 29/72

**Math**

since f and g both have positive leading coefficients, f+g has degree 4. If a is positive, the same holds true. If a = -2, f+a*g has degree 3. So, f+ag can have max degree 4.

**Math**

across y=-5: (x,y)->(x,-5-(y- -5)) = (x,-10-y) across x=1: (x,y)->(1-(x-1),y) = (2-x) now just use them both; they are independent. Check using some graph paper.

**Geomery**

draw one line. Mark its midpoint. Draw the bisector through the midpoint. You have not said it is the perpendicular bisector, so the angle does not matter.

**Math**

311 km/hr * .625mi/km = ? mi/hr 347 euro * 1.25 $/euro = ? $

**Math**

well, she walks 3 trips of 600m each, so ...

**Math**

just calculate the interest on $x -- (.063/12)x = 250 Now just find x.

**Math**

packets of flour: 24*2000 / 500 = 96 packets of sugar: 36*1000 / 250 = 144 so, what next? Did they hand out packets of both as long as they had both, or did they just give one or the other to anyone?

**Further mathematics**

just divide successive pairs of terms. r = (-1/2)/1 = (1/4)/(-1/2) ...

**Further mathematics**

20 = 8+4d, so d=3 Now use that to find x,y,z.

**calculus**

f'(x) = -sinx e^cosx since e^cosx is never zero, f' has zeroes where sinx has zeros. I'm sure you remember enough trig to figure that out.

**math**

get all the x stuff on one side, by adding 4 to both sides of the equation: 3x+x = 32+4 Now collect all the x stuff into one term: 4x = 36 Now divide both sides by 4, to get x all alone: x = 9

**Trigonometric functions**

geez - you know how to draw a sine curve, right? So, draw your generic sine curve, but instead of -1 to 1 on d, label it -10 to 10 and on the t axis, instead of a period going from 0 to 2?, label the axis so it goes from 0 to 2. Sine curves all look the same. Just label the ...

**Trigonometric functions**

what don't you like about what I wrote?

**Trigonometric functions**

I can't see the figure, but if A and B are both 10 cm from the center line, then the maximum value of d is 10. This is the amplitude of the sine function desired, so since the period is 2 seconds, d = 10sin(?t)

**Maths**

so? Is there a question here somewhere? This is the surface area of a cylinder.

**Algebra PLEASE HELP!!**

I assume you mean what is P' ? P' = {5,6,7,8} That is, whatever is in U bot not in P. Or, U-P.

**maths**

once you know d=3, just subtract it 3 times from 49: 49-3*3 = 40

**math**

they are just asking whether 3 divides 138435

**algebra**

1.16p = 40.60

**Math**

correct

**Math-Geometry**

yeah, the lack of pictures makes it impossible, unless you somehow describe the figures. Also, your copy/paste on 3-5 mangled all the special characters. Better try using normal ascii codes, with things like < for angle ° for degrees etc. The characters are easy to find...

**math - impatient much?**

reposting the same thing won't get you help any faster, and only wastes time.

**math**

8 ÷ 1/7 = 8 * 7/1 = 56 Think of it this way. A whole unit has 7 sevenths. You have 8 units, so that's 8*7 sevenths, or 56/7.

**Math**

It is as I wrote it. Sorry I forgot the # sign ...

**Math**

#7. 9x+2 = 38 10. 25+20x <= 425 #1. 3.25x + 1.5 = 14.5 First off, 14.5-1.5=13, not 13.5 Now divide by the size of each batch, to get the number of batches.

**math**

20 * 3^9 - 20 not sure what you want to "answer" I assume your calculator can do the required operations ... google and other online calculators certainly can.

**Dosage Math and Pharmacology**

the numerator is the amount of the blood type the denominator is the total number For example, type O: 8/18 and so on

**English**

extra credit: why? I assume you are studying gerunds ...

**Math**

the function has the same degree as the expression. 2x^3 + 4x^2 -5x + 10 See what you can do with the graph and zeroes.

**Maths**

Drop a perpendicular from D to AB, meeting it at P. Then AP = 6 (Pythagorus) Since we know nothing about BC, x can be anything from 0 to 8. The area is (x+14)/2 * 8 = 4(x+14) If the trapezium is isosceles, then x=2, but without some further knowledge, There's no way to pin...

**Math**

400mg/8hr * 24hr/day * 1oz/28349mg = ? oz

**Math**

34/45 If you want it as a fraction, that's the answer. If you want a decimal approximation, then you can use 0.75555 which you can see is 7/10 + 5/90 = 68/90 = 34/45

**math**

6934 - 4589 = 2345 what? That's not what you wanted? Then you need to provide a little more information about these boxes and circles and how they relate to each other.

**American Government**

Why was it a problem that Congress did not have the power to tax under the Articles of Confederation? a. Congress wanted to provide more services, but it could not afford to without taxes. b. Congress could not regulate trade between the states. c. Congress had to print its ...

**Science**

A and C are both wrong. The degrees can be measured along the equator, though.

**Math**

you are correct

**math**

1.50^2 * (5*7)

**Grammar**

yes, Writeacher's sentence is correct. Yours, however, is not. You only capitalize it if it's a name, not just the kind of relation it is. Wold you write this? On the way to visit my Sister in California, we crossed the Golden Gate Bridge.

**Math**

just unfold the sides and add up the areas of the rectangles.

**Math**

12/x = 8/6 since 12 = 8*3/2, 12/x = 12/9 x=9 or, you can cross-multiply to get 12/x = 8/6 12*6 = 8x x=9

**Geometry**

your answer here, by the way, is correct.

**Calculus @Reiny**

x^2-2xy+y^2+4x-8y+24=0 2x-2y-2xy'+2yy'+4-8y'=0 y' = -(2x-2y+4)/(-2x+2y-8) = (x-y+2)/(x-y+4) so far, so good. For y'=0, we have y=x+2 x^2-2x(x+2)+(x+2)^2+4x-8(x+2)+24=0 x=3 so, y=5 Looks like you missed a minus sign somewhere there. A peek at the graph at ...

**physics**

Draw a diagram, where the train starts at (0,0). The speed makes it easy to convert from minutes to km. The final location is (40,0)+(10?2,10?2)+(-50,0) = (10?2-10,10?2) So, just convert that location to distance and bearing from (0,0).

**Math - impatient much?**

reposting ten minutes later does not get help any faster, and just wastes everyone's time.

**math**

Call A the point 12km from B, where the ship turned west. Then the angle BAC is 65°. Now just use the law of cosines to find BC: BC^2 = 12^2 + 20^2 - 2*12*20*cos65°

**science,**

first, write the balanced reactions, then convert everything from grams to moles, work out the right amount in moles, then convert back to grams or molecules.

**Math**

Nope. Ax+By=C has slope -A/B You found -B/A to see, stop trying to take shortcuts and just work it out 9x-3y = 15 3y = 9x-15 y = 3x-5 see?

**Math**

1 hour is 4/3 as much as 3/4, so it will have covered 4/3 * 2/7 = 8/21 of the lawn. or, using a ratio, 1/(3/4) = x/(2/7)

**Math**

if cot > 0 and cos < 0, then you are in QIII cot? = 3 cos? = -3/?10 sin ?/2 = ?((1-cos?)/2) = ?((1+3/?10)/2) Note that since ? is in QIII, ?/2 is in QII, and so sin? is positive.

**Math**

for negative values, the smallest (most negative) has the largest absolute value -- it is farthest from zero. It's true, even without the vulgarity, obscenity, or profanity.

**math**

you have to know that the factors will be (2x-?)(x+?) where the ?'s must be divisors of 10. So, the only possible factors are (2x+10)(x-1) (2x-10)(x+1) (2x-5)(x+2) (2x+5)(x-2) (2x+2)(x-5) (2x-2)(x+5) (2x-1)(x+10) (2x+1)(x-10) With some practice, you can soon learn to find ...

**math - impatient much?**

asking again under a different name will not get you any faster help, and it just wastes time for everyone involved.

**Math**

Clearly there were equal numbers of sugar and ginger cookies. So, if there were x of each to start with, and y sugar cookies were eaten, then y = .20x 1600-y = .60x Now just solve for x, and there were 2x cookies to start with

**Calculus**

If you are using a limit of 16, then you must be integrating on x, so using discs of thickness dx, v = ?[0,16] ?r^2 dx where r = y = ?(16-x) v = ?[0,16] ?(16-x) dx = 128? Or, you could use shells of thickness dy, where v = ?[0,4] 2?rh dy where r=y and h=x = 16-y^2 v = ?[0,4] 2...

**Math ASAP**

I assume you mean x/50 = 16/25 since 50=2*25, that gives you x/50 = 32/50 or, doing the cross-multiply method, 25x = 16*50 x = 16*2

**Maths**

You know that the perimeter is 28, meaning 4y + 6y-2x+1 + x+2y = 28 x-12y = -27 Since the triangle is isosceles, you also need one of these equations: 4y = 6y-2x+1 4y = x+2y 6y-2x+1 = x+2y So, just work your way through the possibilities, and you wind up with (x,y) = (3,5/2) (...

**algebra**

The factors will be found among (22y±?)(y??) (11y±?)(2y??) a little investigation shows that this works: (11y-5)(2y+7)

**Math**

Take a look at this one https://www.jiskha.com/display.cgi?id=1515438184 and see whether enough work is done by the cue stick.

**math**

<------C-----------D------> is a line extending in both directions C-----------D------> is the ray CD <------C-----------D is the ray DC

**math**

the line CD

**Math**

can't do it as a ratio. There's nothing to compare it to. You might as well ask how to write 3 feet 2 inches or 6 lbs 4 oz as a ratio. It's just a value.

**math**

-12x+13y=-10 13y = 12x-10 y = 12/13 x - 10/13 Now, why do you think it's called the slope-intercept form?

**Math**

r = 1/2 t * t/2 * t/4 = 64 t^3/8 = 64 ...

**Chemistr**

check your periodic table ...

**arithmetic mean**

Not sure what the "shortcut method" is, but if you can see that the data are symmetric about a middle value, that value is the mean. Clearly, the first set has mean=7. So, what about the 2nd set? 5,15,30,40,45,55,60 Hmmm. Not so clear. Better explain what your method...

**math**

just change all fractions to decimals. For example, 5/6 = 0.833 1/8 = 0.125 2/5 = 0.400 Now it's easy to order (2) as you want.

**math**

6x > 660 ...

**mathematics**

you know that x^4 > 0 has solutions x < 0 or x > 0 So, since 11/2 is midway between 4 and 7, just shift right and you have 4-11/2 = 3/2 7-11/2 = 3/2 so, (x - 11/2)^4 > (3/2)^4 see http://www.wolframalpha.com/input/?i=(x+-+11%2F2)%5E4+%3E+(3%2F2)%5E4 and scroll down...

**Math**

add up the total points... 88+83+x = 3*86

**Math**

I find it hard to believe that in the several days you have been posting this question, you have made no headway on its solution... James: 8 Ryan: 5 We have to assume that Simon and Nick each sang 6 or 7 songs. So, start playing around with the playlists. I get JRN: 2 JNS: 4 ...

**Mathematics @dean**

you did (f*g)(x), not (f?g)(x) = f(g(x))

**Mathematics**

(g*f)(3) = g(3) * f(3) = (3^2-1)*(2*3+5) = ...

**jkr school , physics**

The distance traveled in .01 second at time t is 4.9(t+0.01)^2 - 4.9t^2 = 4.9(.02t+.0001) So, if it fell 2m in that time, 4.9(.02t+.0001) = 2.0 t = 20.4 So, it had been falling for 20.4 seconds when it reached the window. Now just figure how far it fell in that time.

**Algebra**

oops: did you catch my typo?

**Algebra**

just add up the amounts of acid present. If there are x oz of 80% solution, then the rest (50-x) is 90%. That means that the final concentration c is found via 80x+90(50-x) = 50c 4500-10x = 50c So, letting c(x) be the final concentration, c(x) = 90-c/5 So, if x=0 (all 90% ...

**math**

(b) h(0) is the height at time 0: when the ball was hit (c) so, 0.6 <= h(0) <= 1.5 (a) Since most balls are hit at a fairly low trajectory, I'd say that since the max height of the ball occurs at roughly 71 meters, that might be a good estimate for the height of the ...

**Busines Math**

So, assuming August's share of capitalization is unchanged at 50, then 1:2:3 = 50:100:150 That shows how much the others need to invest.

**mathematics**

it grew by a factor of 125/84 = 1.488 in 15 years. That is an annual rate of 1.488^(1/15) = 1.02685 So, if t is the number of years after 1990, the population can be found using P(t) = 8400 * 1.02685^t To find when P(t) will be 20000, just solve for t in 8400 * 1.02685^t = ...

**MATH**

midway between 4 and 7 is 11/2 Since f(x) = x^4 > 0 is satisfied by all x<0 or x>0, just shift that a simple quartic shifted down would be x^4 - (11/2)^4 > 0 a more involved one shifted right is (x - 11/2)^4 > 0 16x^4 - 352x^3 + 2904x^2 - 10648x + 14641 > 0

**math**

4P4 = 4! This is just the number of permutations of 4 things.

**math**

just multiply the two amounts. For each main (12), you can choose the appetizer 8 ways.

**Maths**

250/1200 = 0.208333 = 20 5/6 %

**math**

3 ways from a to b now, for each of those ways, there are 5 from b to c. so, just multiply the two sets of ways.

**math**

v = lwh = lhw v/(lh) = w

**Maths**

he gave 1/3 + 2/5 = 11/15 away. So, now we have 4/15 x = 24000 x = 90000

**Math**

wow. That copy/paste doesn't work too well, eh? If I can figure it out, we have 3e^x tany dx + (1+e^x)sec^2y dy = 0 (1+e^x)sec^2y dy = -3e^x tany dx sec^2y/tany dy = -3e^x/(1+e^x) dx 1/(siny cosy) dy = -3e^x/(1+e^x) dx 2csc(2y) dy = -3e^x/(1+e^x) dx ln(tany) = -3ln(1+e^x...