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Chelle
Questions (16)
In what year did the historic divide of the shi'a and sunni take place
1 answer
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Which statement correctly assesses away, in which African countries can reduce the harmful impact that they experience from
1 answer
117 views
Which of the following best complete the sequence below 12,8,5,3,
3 answers
3,875 views
An urn contains white and green balls. Four balls are randomly drawn from the urn in succession, with replacement. That is,
1 answer
961 views
Need help setting this up!
A corner store has 54 pieces of candy. The number of gumdrops is six less than two times the number of
1 answer
508 views
Differentiate:
f(x)=(secx)/[1+sec(x)]
1 answer
357 views
differentiate:
g(t)=tˆ3cos(t)
1 answer
353 views
What is the derivative
(tˆ2)ˆ(1/3)+2(tˆ5)ˆ(1/2)
3 answers
427 views
What is the derivative of
R(x)=(√7)/(xˆ10)
1 answer
361 views
suppose y=√(2x+1), where x and y are functions of t.
a)if dx/dt=3, find dy/dt when x=4 b)if dy/dt=5, find dx/dt when x=12
1 answer
1,800 views
The length of rectangle is increasing at a rate of 8cm/s and its width is increasing at a rate of 3cm/s. When the length is 20cm
1 answer
998 views
Make a singn diagram for the derivative of the function f(x)= (x-1)^4
0 answers
392 views
"A recent study determined that the distance employees at a pharmaceutical company in New Jersey commute to work each way is
0 answers
546 views
The diagonal of a rectangle measures 26 cm the width of the rectangle is 24 cm find the length of the rectangle.
1 answer
929 views
How much foil is required to cover a rectangular box that is 4 in by 8 in by 5 in?
1 answer
401 views
What method of ethical oversight (such as a code of ethics, an ethics advisory board, oversight by the board of directors, or an
2 answers
1,131 views
Answers (69)
(5r - 6s + s2) (13r + 3s - 5s2) 5r x 13r = 65r^2 5r x 3s = 15rs 5r x -5s^2 = -25rs^2 -6s x 13r = -78rs -6s x 3s = -18s^2 -6s x -5s^2 = 30s^3 s^2 x 13r = 13rs^2 s^2 x 3s = 3s^3 s^2 x -5s^2 = -5s^4 Combined like terms: -25rs^2 + 13rs^2 = -12rs^2 -78rs + 15rs
Yes! That's correct! 1/5 of 120 1/5 * 120 120/5 = 24
(4j^2)^2 (4j^2)(4j^2) = 16j^4
(2x)^-6 (1/2x)^6 = 1/64x^6
Surface Area A = 2•pi•r^2 + 2•pi•r•h The radius is half the diameter 2(3.14)3^2 + 2(3.14)3•20 56.52 + 376.8 = 433.32 A = 433cm
Cost: $200 Selling Price: $275 275/200 = 1.375 Move decimal two places to right: 137.5 Or, Multiply by 100: 1.375 x 100 = 137.5 Next, subtract 100 from 137.5 137.5 - 100 = 37.5% Or, you can just subtract the cost from the selling price then divide answer
9x + y = 11 Solve for y 9x - 9x + y = -9x + 11 y = -9x + 11 Solve for x 9x + y - y = -y + 11 9x = -y + 11 9x/9 = -y/9 + 11/9 x = -y/9 + 11/9
(2,12)and(6,11) Slope Formula: m = y2 - y1 / x2 - x1 11 - 12 / 6 - 2 m = -1/4
1.(Y+5)(Y-7)=0 y+5=0 y-7=0 y=0-5 y=0+7 y=-5 y=7 2. 2n(n-20)=0 2n=0 n-20=0 2n/2=0/2 n=0+20 n=0 n=20 3.(2t-3)(3t-2)=0 2t-3=0 3t-2=0 2t=0+3 3t=0+2 2t=3 3t=2 2t/2=3/2 3t/3=2/3 t=3/2 t=2/3 4.(2u+7)(3u-1)=0 Follow above!
a = apples p = pears Two equations 2a + 3p = 345 3a + 5p = 555 Elimination Method 3(2a + 3p = 345) -2(3a + 5p = 555) 6a + 9p = 1035 -6a - 10p = -1110 ________________________ -p = -75 p = 75 2a + 3(75)= 345 2a + 225 = 345 2a = 345 - 225 2a = 120 2a/2 =
x = larger number y = smaller number Equations: x - y = 11 x/y = 2 + 4/y Get rid of fractions in second equation by multiplying by y. y(x/y = 2 + 4/y) x = 2y + 4 > plug this into the first equation. Solve for y and then x.
x^2-x-12=0 (x - 4)(x + 3)= 0 x - 4 = 0 x = 0 + 4 x = 4 x + 3 = 0 x = 0 - 3 x = -3
Equations: Substitution x + y = 30 x = y - 2
Equations: Substitution y = 2a + 3p = 345 y = 3a + 5p = 555
d = desk c = chair Equation: d + c = 200 d = 4c
d = dimes q = quarters Equations: 10d + 25q = 285 d + q = 15 Solve by substitution or elimination Substitution: 10d + 25q = 285 d = 15 - q Elimination: 10d + 25q = 285 -10(d + q) = -10(15)
Set up two equations a = adults c = children 70a + 40c = 27750 a + c = 450 Solve by substitution or elimination Substitution: 70a + 40c = 27750 a = 450 - c Elimination: 70a + 40c = 27750 -70(a + c) = -70(450)
3 dozens = 36 Markup is 30% of selling price Original selling price of each camcorder? 100% + 30% = 130% Change 130% into a decimal, then multiply by 5040 5040 x 1.30 = 6552 Now divide 6552 by 36 6552/36 = 182 Each camcorder cost $182.00
-5y - 9 = y - 1 -5y - y - 9 = -1 -6y - 9 + 9 = - 1 + 9 -6y = 8 -6y/-6 = 8/-6 y = -4/3 Are you sure you have the right equation? If the equation said: 5y + 9 = (y + 1), y would equal -2 5y - y + 9 = 1 4y + 9 - 9 = 1 - 9 4y = -8 4y/4 = -8/4 y = -2
You have four colors to choose from, with black and green being the highest. So I added those two and subtract from the total amount of marbles. If you was to pick one of each color, you still have one pick left, guaranteeing two of the same color. Right?
1/3x + 1/4y = 7 1/3x - 3/4y = -9 Make one of the equations negative to eliminate the x's. -(1/3x + 1/4y) = -(7) -1/3x - 1/4y = -7 1/3x - 3/4y = -9 ____________________ -y = -16 y = 16 Now solve for x. Use either equation. 1/3x + 1/4(16) = 7 1/3x + 4 = 7
Order Of Operation: 1. Parenthesis 2. Multiplication 3. Subtraction 72 - 5(13 + 2)* 5 (15) 5(15)* 5 75 * 5 375 72 - 375 = -303
Equation: d = denominator n = numerator d = 2n - 4 Plug in numbers for n 2*3-4=2 2*6-4=8 2*9-4=14 2*12-4=20 n = 12 d = 20 Fraction: 12/20
Thanks, Ms. Sue! Now I see!
4 divided by 2/3 4 _______ 2/3 Rewrite so you can see it better. 4 over 1 divided by 2 over 3. 4 2 ___ / ____ = 1 3 Take the reciprocal 2/3 4 3 12 ___ x _____ = ______ = 6 1 2 2 Answer: 6 Check: 2/3 of 6 2 6 12 __ x ___ = ___ = 4 3 1 3
x = larger number y = smaller number x = 3y x - y = 60 Substitution Method: 3y - y = 60 2y = 60 2y/2 = 60/2 y = 30 Solve for x x = 3(30) x = 90 90 - 30 = 60
(8,-2) and (4,-4) are on the line Find slope: m = y2 - y1/x2 - x1 -4 - (-2)/4 - 8 = -2/-4 = 1/2 m = 1/2 Use either point to find y-intercept. y = mx + b -4 = 1/2(4) + b -4 = 2 + b -4 - 2 = 2 - 2 + b -6 = b y = 1/2x - 6
slope=4, y-intercept=-3 y = 4x - 3 slope=2/5, (10,3) is on the line y = mx + b 3 = 2/5(10) + b 3 = 4 + b 3 - 4 = 4 - 4 + b -1 = b y = 2/5x - 1
2a+2b _______ = 5c z 2a + 2b = (z)5c 2a = -2b + 5cz 2a/2 = -2b/2 + 5cz/2 a = -b + 5cz/2
Just put the x and y values into the expression. 4(6)+5(17) 4 x 6 + 5 x 17 24 + 85 = 109
x = games won y = games lost Write two equations: x + y = 96 x = 2y Substitute the second equation into the first equation: 2y + y = 96 3y = 96 3y/3 = 96/3 y = 32 Solve for x. Put y value in either equation: x = 2(32) x = 64
6,12,9,18,15,30,60 6 x 2 = 12 9 x 2 = 18 15 x 2 = 30 30 x 2 = 60
Yes!
4x+2-3x=4+1 4x + 2 - 3x = 5 4x + -3x = x x + 2 = 5 x + 2 - 2 = 5 - 2 x = 3
(3*((-5)+7))+((19-7)/4) (-5+7=2) (19-7=12 > 12/4=3) 3 * 2 + 3 = 9 Yes!
x - 5/6 = 1/10 30(x - 5/6) =30(1/10) 30x - 25 = 3 30x - 25 + 25 = 25 + 3 30x = 28 30x/30 = 28/30 x = 28/30 x = 14/15
-3 + 8x - 8 = -8 -11 + 8x = -8 -11 + 11 + 8x = -8 + 11 8x = 3 8x/8 = 3/8 x = 3/8
(3^-2) ___________ p 1/3^2 ___________ p 1/9 _______ = p 1/9 _______ = p/1 Take the recipical 1/9 * 1/p = 1/9p
LCM Solve by writing the multiples. 8 > 8,16,24,32,40,48,56,64,.... 10 > 10,20,30,40,50,60,...... Solve by prime factorization. 8 10 / \ / \ 2•4 2•5 \•/\ 2•2•2 2•2•2•5 = ?
f = father g = Gustav Write two equations. f = 7g f - 1 = 9(g - 1) Substitute first equation into second. 7g - 1 = 9g - 9 7g - 9g -1 + 1 = 9g - 9g - 9 + 1 -2g = -8 -2g/-2 = -8/-2 g = 4 Substitute g value in either equation. f = 7(4) f = 28 Check: One year
t(6) = -3 t(11) = -13 -3 - (-13) = 10 10/5 = 2 Go one term back from last term to find term 1. t(10) = 10(2) + -13 = 7 t(1) = 7 Now you can find term 0 7 + 2 = 9 t(0) = 9 Common difference is: d = -2 Equation: tn = -2n + 9 t(1) = 7 t(2) = 5 t(3) = 3 t(4) =
x = larger number y = smaller number Write two equations, then do the substitution method. x + y = 53 x = y + 13 y + y + 13 = 53 2y + 13 = 53 2y + 13 - 13 = 53 - 13 2y = 40 2y/2 = 40/2 y = 20 Now solve for x. You can use either equation. x = 20 + 13 x = 33
1/4 + 3/4 + 7/15 = ? 1/4 + 3/4 = 4/4 4/4 = 1 1 + 7/15 = 15/15 + 7/15 = 22/15 22/15 = 1 7/15
y = 1/2x + 3 Slope: m = 1/2 y-intercept is when x = 0 y = mx + b y = 1/2(0)+3 y = 0 + 3 y = 3 y-intercept is 3 x-intercept is when y = 0 0 = 1/2x + 3 > move 1/2x to the left and change sign. 0 -1/2x = 3 -1/2x = 3 > divide on both sides by -1/2 x = -6
(-1,4) (-5,2) Slope: m = y2 - y1/x2 - x1 2 - 4 / -5 - (-1) = -2/-4 m = 1/2 Equation: y - y1 = m(x - x1) y - 4 = 1/2(x - (-1)) y - 4 = 1/2(x + 1) y - 4 + 4 = 1/2x + 1/2 + 4 y = 1/2x + 9/2
-5x - 4y = -11 10x = -6 - y For the second equation, move -y to the left side and change sign to positive. -5x - 4y = -11 10x + y = -6 Now you are either going to eliminate the x's or y's first. If it is x's, then multiply the first equation by 2. If it is
The difference of a number and ten (x - 10) The product of three 3 x (x - 10) Is 15 3 x (x - 10) = 15 3(x - 10) = 15 3x - 30 = 15 +30 +30 __________________________ 3x = 45 ____ ____ 3 3 x = 15
-3(4 - 2g)- 6 -12 + 6g - 6 -18 + 6g or 6g - 18
1.) f(x) = -2x + 1; {-6, -2, 0} -2(-6) + 1 = 13 -2(-2) + 1 = 5 -2(0) + 1 = 1 range: {13, 5, 1} 2.) f(x) = x^3 + 1; {-2, -1 3} -2^3 + 1 = -7 -1^3 + 1 = 0 3^3 + 1 = 28 range: {-7, 0, 28}
2(x-3) = 2x 2x - 6 = 2x Move 2x to the left side and change sign. Then put zero after the equal sign. 2x - 2x - 6 = 0 2x's cancels out. 0 = 6 No Solution ________________________________ 3(y - 3)= 2y - 9 + y 3y - 9 = 3y - 9 Move 3y to the left and -9 to
