All Questions ⁺⁰230427 Questions

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97

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Algebra

Find all real numbers x such that (3x - 27)^3 + (27x - 3)^3 = (3x + 27x - 30).

Guest Nov 14, 2022

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156

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Domain

What is the domain of the function f(x)=(x + 6)/sqrt(x^2-3x)?

Guest Nov 14, 2022

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99

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Fractions

Given the following list of numbers: \frac{3}{5}, \frac{5}{6}, \frac{1}{40}, \frac{2}{3}, \frac{9}{8}, \frac{19}{20} \frac{7}{9}, \frac{3}{4} what is the smallest number subtracted from the biggest number? Express your answer as a decimal.

Guest Nov 14, 2022

+1

172

4

+273

halp!

What is the smallest distance between the origin and a point on the graph of
Thanks!

TheEarlyMathster Nov 14, 2022

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102

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Algebra

Fill in the blanks to make the equation true.

___^3 * ____ * _____^2 = x^5*y^6
read more ..

Guest Nov 14, 2022

Nov 13, 2022

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127

1

Quadratic

If t is a real number, what is the maximum possible value of the expression -t^2 + 8t -4 - 3t^2 - 11?

Guest Nov 13, 2022

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96

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geometry

In triangle ABC, M is the midpoint of AB. Let D be the point on BC such that AD bisects BAC and let the perpendicular bisector of AB intersect AD at E If AB=44, AC=30 and ME=10 then find the area of triangle BMD.

Guest Nov 13, 2022

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93

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Derivatives

f(x)= 3e2x
now what is f 20 (0)

Guest Nov 13, 2022

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112

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Derivatives

f(x)= cos(e2x).
calculate f''(0.5)

Guest Nov 13, 2022

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93

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Rectangles

Two rectangles overlap, as shown below. Find the area of the overlapping region (which is shaded) if AB = BE = 2 and AD = ED = 4.

read more ..

Guest Nov 13, 2022

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160

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quadratic

a, b, and c are constants such that the quadratic ax^2 + bx + c can be expressed in the form 2(x-4)^2 + 8. When the quadratic 3ax^2 + 2bx + c(for the same values of a, b, and c) is expressed in the form n(x-h)^2 + k, what is h?

Guest Nov 13, 2022

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90

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what is the value of the expression ya'll?

What is the value of the expression?
(815+415)−(668−

Guest Nov 13, 2022

0

155

2

Angle bisector

Let AB be a diameter of a circle, and let C be a point on the circle such that AC=8 and BC=4 The angle bisector of ACB intersects the circle at point M Find CM.

Guest Nov 13, 2022

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129

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need help

If I give my brother 5 dollars, then we will have the same amount of money. If instead, he gives me 14 dollars, then I'll have three times as much money as he will have. How much money does my brother currently have (in dollars)?

Guest Nov 13, 2022

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141

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Algebra

Let c be a real number, and consider the system of quadratic equations
y = 6x^2 - 9x + c - x^2 - x
y = 5x^2 - 3x + x^2 + 2x

For which values of c does this system have:
(a) Exactly one real solution (x,y)
(b) More than read more ..

Guest Nov 13, 2022

0

127

2

need help

Dogs in the GoodDog Obedience School win a blue ribbon for learning how to sit, a green ribbon for learning how to roll over, and a white ribbon for learning how to stay. There are 100 dogs in the school.
* 62 have blue ribbons, 65 have read more ..

Guest Nov 13, 2022

+1

148

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counting problem

Find the number of positive integers that satisfy the following conditions:
* Each digit is a 1 or a 2 or a 3
* The sum of the digits is 10

Guest Nov 13, 2022

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129

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Sum

Explain how to calculate 75 + 72 + 69 + 66 + ... + 21 + 18 + 15 + ... + (-69) + (-72) + (-75) + (-78) + (-81) without a calculator.

Guest Nov 13, 2022

+1

134

1

Algebra

The real numbers x,y and z satisfy the equations x+2y+3z=950 and 3x+2y =1450 and y + 3z = 500. What is the average of x, y and z?

Guest Nov 13, 2022

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90

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Algebra

For a real number r, let s(r) denote the set of real numbers that can be expressed in the form
a1 r + a2 r^2 + a3 r^3 + ...
with an infinite number of terms, where ai in {0,1}
(a) Show that 1/2 an element in S(1/4)
(b) Show that 1/5 read more ..

Guest Nov 13, 2022

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148

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counting question

A certain club has 50 people, and 10 members are running for president. Each club member either votes for one of the 10 candidates, or can abstain from voting. How many different possible vote totals are there?

Guest Nov 13, 2022

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141

1

help algebra

Pearl writes down seven consecutive integers, and adds them up. The sum of the integers is euqal to 14 times the largest of the seven integers. What is the smallest integer that Pearl wrote down?

Guest Nov 13, 2022

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132

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Equation

Solve for x: (3x + 12)(x + 4) = (4x^2 + 8x + 8x^2)/(2x).

Guest Nov 13, 2022

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