All Questions ⁺⁰230410 Questions

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133

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help probability

The following cards are dealt to three people at random, so that everyone gets the same number of cards. What is the probability that everyone gets a red card?

[There are three red cards and three blue cards]

Guest Nov 17, 2022

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121

2

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 17, 2022

Nov 16, 2022

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94

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Equation

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

Guest Nov 16, 2022

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142

1

system

Find all solutions to the system
a + b = 14
a^3 + b^3 = 812 + a^2 + b^2

Guest Nov 16, 2022

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179

1

help plz

Jen's phone uses a simple algorithm to count the number of strides she takes. The algorithm looks at the phone's accelerometer measurements, and counts a stride each time the acceleration goes from below to above $3$ g. Based on the number of strides counted read more ..

Guest Nov 16, 2022

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132

1

Angle bisectors

Let ABC be a triangle, and let its angle bisectors be AD, BE, and CF, which intersect at I. If DI = 3, BD = 4, and BI = 8, then find the area of triangle ABC.

Guest Nov 16, 2022

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132

1

plz need help

Arrange the following numbers in increasing order (smallest first, biggest last):

A = 2*1/2*4*1/6
B = 12*128 read more ..

Guest Nov 16, 2022

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119

1

inequalities

Is 4400>v not the same answer as v<4400 or am i tripping? rearanging the numbers changes the entire inequality or is khan academy just being annoying

Guest Nov 16, 2022

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127

2

help with counting

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 16, 2022

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98

0

System

Find the ordered quintuplet (a,b,c,d,e) that satisfies the system of equations
a + 2b + 3c + 4d + 5e = 41
2a + 3b + 4c + 5d + e = 57
3a + 4b + 5c + d + 2e = 34 read more ..

Guest Nov 16, 2022

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94

0

need help

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 16, 2022

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123

1

help plz

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 16, 2022

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108

0

what is the difference between (4y^2+2y-6)-(-8y+5)?

what is the difference between (4y^2+2y-6)-(-8y+5)?

Guest Nov 16, 2022

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92

0

algebra

Find the largest integer k such that the equation
5x^2 - kx + 8 = 4x^2
has no real solutions.

Guest Nov 16, 2022

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133

1

counting

In a row of five squares, each square is to be colored either red, yellow, or blue, so that no two consecutive squares have the same color, and at lest three of the squares are red. How many ways are there to color the five squares?

Guest Nov 16, 2022

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134

1

how many times can 125 go into 733

how many times can 125 go into 733

Guest Nov 16, 2022

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141

1

What is the solution to this inequality?

What is the solution to this inequality?
4x+2<-14 or 3x-5>16
A. x<-4
B. x<-4 or x>7 read more ..

Guest Nov 16, 2022

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93

0

precalc

(a) In triangle ABC, angle BCA = pi/4, AB = 5, and AC = 6. Find the sum of all distinct possible values of BC If there are no possible values, enter 0.

(b) In triangle ABC, angle BCA = pi/4, AB = 6, and AC = 4. Find read more ..

Guest Nov 16, 2022

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138

1

Ellipse

The line 2y=3x intersects the ellipse x^2/8+y^2/16 = 1 at the points Q and R. What is the length of segment QR?

Guest Nov 16, 2022

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134

1

Probability

In Ms. Q's deck of cards, every card is one of four colors (red, green, blue, and yellow), and is labeled with one of seven numbers (1, 2, 3, 4, 5, 6, and 7). Among all the cards of each color, there is exactly one card labeled with each number. The read more ..

Guest Nov 16, 2022

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94

0

Algebra

Find all real values of x such that
(x^2 + 2x + 5 - x - 4)(3x^2 - x - 4 + 2x + 8) >= 0

Guest Nov 16, 2022

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103

0

Algebra question

In November's Math Meet, the Little Monsters of Beast Academy solved 1/3 of the problems. In March's Math Meet, they solved 2/7 of the problems. (There might be different numbers of problems asked in November and March.)
In total, the Little Monsters read more ..

Guest Nov 16, 2022

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175

1

+656

Please help with some earlier problems that were not answered

1. https://web2.0calc.com/questions/help-is-needed_7

2. https://web2.0calc.com/questions/pls-help-not-sure-if-impossible-or-if-it-s-a-number
read more ..

Keihaku Nov 16, 2022

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153

2

+656

Please help with another linear inequality problem

Find a linear inequality with the following solution set. Each grid line represents one unit.

(Give your answer in "standard form" or read more ..

Keihaku Nov 16, 2022

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