Saturday
August 2, 2014

Posts by Chol


Total # Posts: 76

Math
Shantle and Kwamie are planning to buy their first home. Although they are excited about the prospect of being homeowners, they are also a little frightened. A mortgage payment for the next 30 years sounds like a huge commitment. They visited a few developments and scanned the...

Math
Find the monthly payment. Mortgage amount Annual percentage rate 2. $146,800 5.25% 30 years 4. $113,400 5% 15 years 6. Find the interest paid the mortgage in exercise 2. 8. Find the total interest paid for the mortgage in exercise 4.

Math
In interviewing November's statement she notices that her beginning balance was $600 and that she made a $200 payment on November 10. She also charged purchases of $80 on November, 5, $100 on November 15, and $50 on November 30. She paid $5.27 in interest the month before...

Math
If you purchase a fishing boat for 18 monthly payments of $106 and an interest charge of $238, how much is the refund after 10 payments

Math
Find the discount (ordinary interest) and proceeds on a promissory note for $2,000 made by Barbara Jones on February 10, 2007, and payable to First State Bank on August 10, 2007, with a discount rate of 9%.

Math
Find the annual percentage rate on a loan of $1,500 for 18 months if the loan requires $190 interest and is repaid monthly.

Math
Malinda Levi borrows $12,000 on a 9.5% , 90 day note. On the 30th day, Malinda pays $4,000 on the note. If ordinary interest is applied, what is Malinda’s adjusted principal after the partial payment? What is the adjusted balance due at maturity?

Math
The finance charge on a copier was $1,778. The loan for copier was to be paid in 18 monthly payments. Find the finance charge refund if it is paid off in eight months.

Math
Alice Dubois was charged $455 in finance charges on a loan for 15 months. Find the finance charge refund if she pays off the loan in full after 10 payments.

math
Real Estate an office building purchased for $1, 200,000 is appreciating because of rising property values in the city. At the end of each year its value is 105% of its value at the end of the previous year. a. Use a recursive formula to determine what the value of the buildin...

algebra for business
(a) R = 15p (b) C = 55 + 4p (c) Revenue [5*15]= $75 Variable cost [5*4]= $20 contribution 55 fixed cost -55 Net profit. 0 (d) 15p = 55 + 4p 11p = 55 p = 5 pizzas break-even Profit = revenue - cost 15(500)-4(500)-55 = $5445 Sell 500 pizzas $5445 (e) profit = 15p -55-4p 1100 = ...

Math
2x-1 -2/(4x+1)

algebra
FV = 2800e^(.055*12) FV = 2800e^(.66) = 5417.42

statistics
Yes there is enough evidence to support---- T = (16-15.6)/(.3/sqrt(8)) df = n-1 df = 8-1 = 7 critical t value = 1.895

algebra
2.1(-1.2x+2.3y-1.1) = -2.52x + 4.83y -2.31

Probability
M C. D. Total Ma. 3. 6. 2. 11 Fe. 7. 4. 8. 19 Tot. 10. 10. 10. 30 P(Chim or Dog) = P(Chim) + P(Dog) -P(0) 10/30 + 10/30 -0 = 20/30 = 2/3

Probability
P(Casper) = .4 P(Denver) = .3 P(Casper u Denver) =0.27 P(Casper|Denver) P(Casper u Denver)/ P(Denver) = .27/.3 = 0.9

Math- averages
Three weeks is 7*3= 21 cars In week four is 11* 1 = 11 cars Add/n (21+11)/4 32/4 = 8

bussiness math
Let Angela needs n flower bulbs for an area measuring 230 square inches. n/230= 1/5 n= 230/5=46 Anglela needs 46 flower bulbs

statistics
z = (186.3-200)/(30/sqrt(9)) z = -1.37, you can use your table

Math Statistics
a. The standard error of the sample mean is 4.564/sqrt(36) = 0.7607 b. yes The mother's mean age student birth lie in interval (28.358, 30.928)

Math
315.10 -239.95 = $75.15

Math
a= x b = x+7 c = 13 x^2 + (x+7)^2 = 13^2 = x^2 + x^2 +7x +7x + 49 = 169 = 2x^2 + 14x + 49 = 169 = 2x^2 + 14x + 49 -169= 169-169 = 2x^2 + 14x -120 = 0 = x^2 +7x -60 = 0 (x -5)(x+12)= 0 x = 5 x = -12 ignored when it is negative a= 5 b = 12

geometry
For an inscribed n-gon, circle radius is r A = (r^2 *n sin(2pi/n))/2 For the circumscribed n-gon A = r^2 *n tan(pi/n)

math
(x+5)(x-7) = X^2-7x+5x-35 = x^2-2x-35

math
x^2+x(x-5)-x+7 = x^2 +x^2-5x-x+7 = 2x^2-6x+7

Math-probability
Down-hill =20% Cross-country =15% In down-hill and cross-country (20%)(40%) = 0.08

statistics
z = (300-300)/(39/sqrt(700)) z = (378-300)/(39/sqrt(700))

STATISTICS
There are 12C3 = 220 ways, group of 3 people from 12 There are 9C3 = 84 ways, none of the three oldest. 220-84 = 136 groups where at least one member is 3 oldest. 136/220 = 0..618

Algebra world problem
Let l be 2x -7 w = x A = lw 72 = (2x-7)x 72 = 2x^2 -7x 2x^2 -7x -72 =0 (2x+9)(x-8) = 0 x -8 = 0 x = 8 l = 2x-7 l = 2(8) -7 l = 16-7= 9 L = 9 m and w =8 m

Accounting
Direct labor rate variance (AR-SR)AH (11.6-12)(7500) = $ 3,000 favorable

algebra
=24x^6/4x^3- 12^3/4x^3 = 6x^3. -3

math
I = prt I = 6510(0.0325)(5)

Accounting
Past year units 6552000/(600-444) = 42000 units Coming year units 655200/ (600-450) = 43680 units

Accounting
Margin units = 32-20 = 12 Fixed cost = 240000 break-even = 240000/12 = 20000 Margin units = 36-20 = 16 Fixed cost = 240000 New break-even = 240000/16 = 15000 20000 units and 15000 units

Accounting
60000/(105-70) 60000/35 = 1714.29 0r 1714 units

Calculus
f(x) = 3e^x -2x^2 + c 10 = 3e^0 -2(0)^2+ c 10 =3-0+ c 7= c F(x) = 3e^x -2x^2 + 7

alg2 check
-2 = (-2/3)(-6) + b -2 = 4 + b -2-4 = 4-4 +b -6 = b m = -2/3 y = mx + b y = -2x/3 +(-6) y = -2x/3 - 6

alg2 check
y = mx + b m = -2, b = -6 y = -2x +(-6) y= -2x-6

math
If 3x^y 2. -24x^2+y

math
1. 1/x^2 y

algebra
= 2x -y +14x^2-7xy +10x = 14x^2 +12x -y -7xy

math
= x + 2y + 6x^2-12xy+8x = 6x^2 +9x + 2y -12xy

math
=(-2)^2 y^1 * (3x^3) = 4(3)y^2 x^3 =12y^2 x^3

Math - MAD
mean = (6+15+7+14+11+ 13 + 15 +15)/8 = 12 Median: arranged number from smallest to largest 6 7 11 13 14 15 15 15 Median: (13+14)/2 = 27/2 =13.5 Mode: 15

algebra
=3(8x^2 +14x +5) =3(2x + 1)(4x +5)

algebra
3(8x^2 + 14x +5) = 3(2x + 1)(4x + 5)

algebra
-(6x-1)(36x^2 +6x +1)

algebra
=5√3 - √49*2 + √16*3 + 6√2 =5√3 -7 √2+ 4√3+ 6√2 = 9√3 - √2

algebra
5√3 -7 √2+ 4√3+ 6√2 9√3 - √2

algebra
√25*2 = 5√2

Math
y = -x +2 x^2 + (-x +2)^2 = 34 x ^2 + x^2 -2x -2x +4 = 34 2x^2 -4x + 4 = 34 2x^ -4x + 4 -34 = 34-34 2x^2 -4x - 30 = 0 2(x^2 -2x -15) =0 2(x-5)(x+3) =0 x -5 =0 x =5 x+ 3 = 0 x =-3 y = -3 ,5 (5,-3), (-3,5)

Accounting
Break-even = 250000/(125-73) = 250000/52 = 4808 units

Accounting
(300000-30000)/(31-22) = 30000 units

alg2 help
16x^2 /9y^2

Accounting
12500

Accounting
Income from operation $78,000

Accounting
a) Sales =$ 1,800,000 Variable costs = 1,080,000 Contribution margin = $720,000 contribution margin ratio = 720000/1800000 = 40% b) sales = $900,000 contribution margin ratio 32% contribution margin = 288000 less fixed cost = 210000 Income from operation = $7800

Accounting
a) unit margin =110-80 = 30 Fixed cost =345000 Break-even = 345000/30 = 11500 units b) new break-even = 345000/40 = 8625 units

Accounting
a) unit margin = 80-55 =25 break-even = 740000/25 = 29600 units b) (740000+140000)/25 = 880000/25 = 35200

MATH
y-intercept of the linear regression is 2.07.

alg2 check?
1. (2)(3)x^1+3 = 6x^4 2. (4)^3 x^1*3 y^2*3 = 64x^3y^6

Calculus
y' = -2x*e^(-x^2). At x = 2, that the slope of the tangent line is: y' = (-2)(2)e^[-(2)^2] = -4e^(-4) = -4/e^4. tangent line is: y - 1/e^4 = (-4/e^4)(x - 2) y = (-4/e^4)x + 9/e^4.

Calculus
f'(x) =e^x -(e^-x))/2

math
800(1.05)^40

algebra 2
y = kxz 8 = k(-2)(4) 8 = -8k k = -1 y = -3x 12 = -3x x = -4 Answer is A

statistics
z = (65-76)/6 z = -1.83 z = (90-76)/6 z = 2.33

Math
(2/25 +13/25) - (2/5 - 14/15) = 15/25 - (-8/15) = 15/25 + 8/15 (45+40)/75 = 85/75 = 17/15

algebra
r = .62(216)^1/3 r = .62(216)^1/3 r = .62*6 = 3.72

math
Given, Age of manoj after 12 years = 3 × Age of Manoj 4 years ago (x + 12 ) = 3 (x – 4) x + 12 = 3x – 12 x -x + 12 = 3x-x -12 12 = 2x -12 12 + 12 = 2x -12 + 12 2x = 24 2x/2 = 24/2 x = 12 Thus, present age of manoj is 12 years.

statistics
78.4-+ 1.96*11/sqrt(36)) (74.81, 81.99)

Math
x + r = 90 x + r- r = 90 -r x = 90-r

math
A = 73000(1+ .08/2)^11*2 A = 73000(1.04)^22

math
Total = 55 + 5 + 20 = 80 P( green) + P( yellow) - P(green and yellow) ( 55 + 5)/80 -0 P = 60/80 = .75

algebra
P(A) + P(B) - P(A and B) 35/90 + 40/90 -10/90 = 13/18

algebra2
4x^2 -2x + 11 -40/x+4

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