All Questions ⁺⁰157875 Questions

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help plz

One day, Alexis decides to write down all the numbers from 1 to 999, inclusive.
a) How many digits did Alexis write, in total?
b) Alexis chooses one of the digits written down at random. What is the probability that the chosen digit is a 7? read more ..

Guest 4 hours ago

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help

Adult tickets to a basketball game cost $5. Student tickets cost $1. A total of $2,783 was collected on the sale of 1,235 tickets. How many of each type of ticket were sold?

Guest 6 hours ago

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Need help

The measures of two angles of an isosceles triangle are $3x + 4^{\circ}$ and $x + 16^{\circ}$. Find all possible values of $x$.

Guest 8 hours ago

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Consider the infinite series defined by

Consider the infinite series defined by
∞ ∑ (2n! /2^(2n))
n=1
(a) What is the value of r from the ratio test? read more ..

Guest 8 hours ago

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+205

Geometry Questions

1) In acute triangle ABC, we know AB = 7, BC = 8, and that CA is the shortest side. What is the smallest possible integer value of CA?

2) Two diagonals of a parallelogram have lengths 6 and 8. What is the largest possible read more ..

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Rudram592 9 hours ago

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+220

hElP

There are 30 men and 40 women in the Town Library Club. They wish to form a 7-person steering committee with 3 men and 4 women. In how many ways can they form the committee?

atlas9 9 hours ago

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+767

Base Stuff

How many two digit positive integers in the base-four representation are twice the two digit positive integers in the base-three representation?

A) 5
B) 6 read more ..

PartialMathematician 9 hours ago

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NEEDHLP

If a Canada goose completes a -mile migration in exactly days and hours, then what was her average speed for the whole trip in miles per hour?

Guest 10 hours ago

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+220

help :(

If 23=x^4+1/(x^4), then what is the value of x^2+1/(x^2)?

where do i even start? :'(

atlas9 11 hours ago

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Help Please

A researcher observes and records the height of a weight moving up and down on the end of a spring. At the beginning of the observation the weight was at its highest point. From its resting position, it takes 12 seconds for the weight to reach read more ..

off-topic

Guest Jan 26, 2020, 12:25 AM

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Help Please

A sine function has the following key features:
Period = π
Amplitude = 2
Midline: y=−2 read more ..

Guest Jan 26, 2020, 12:14 AM

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Help

Period = 4
Amplitude = 3
Midline: y=−1
y-intercept: (0, -1) read more ..

off-topic

Guest Jan 26, 2020, 12:04 AM

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Help Please!

I have 5 different history textbooks and 4 different science textbooks. In how many ways can I place the 9 textbooks on a bookshelf, in a row, if there must be a science textbook in the middle, and there must be a history textbook at each end? read more ..

Guest Jan 26, 2020, 12:01 AM

Jan 25, 2020

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What is the answer

What 10000000000000000 x 9999999999999999999999999999

Guest Jan 25, 2020, 11:43 PM

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In the diagram below, we have PQ = 2AP = 2QB and AR/RC = 2/3. Find the ratio of the area of triangle BCQ to the area of triangle CQR.

In the diagram below, we have PQ = 2AP = 2QB and AR/RC = 2/3. Find the ratio of the area of triangle BCQ to the area of triangle CQR.
read more ..

Guest Jan 25, 2020, 11:07 PM

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Draw an example of a parallelogram in which both the base and height are the sides.

Draw an example of a parallelogram in which both the base and height are the sides.

Guest Jan 25, 2020, 10:36 PM

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point estimate

Determine the point estimate of the population proportion, the margin of error for the following confidence interval, and the number of individuals in the sample with the specified characteristic, x, for the sample size provided.Lower boundequals0.293, read more ..

Guest Jan 25, 2020, 10:27 PM

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+220

help!

Given two real numbers 1 \(\frac{1}{p} + \frac{1}{q} = 1\) and , what is q?

I can't figure out how to do this.. i keep ending up only knowing what is, which is -9/2. was i supposed to go that way? read more ..

atlas9 Jan 25, 2020, 9:47:12 PM

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Please Help, ASAP!

The diagram below shows four circles. Let $A_1,$ $A_2,$ $A_3,$ $A_4$ denote the areas of the red region, yellow region, green region, blue region, respectively. These areas satisfy \[A_1 = \frac{A_2}{2} = \frac{A_3}{3} = \frac{A_4}{4}.\]Let $r_1$ denote read more ..

Guest Jan 25, 2020, 9:19:53 PM

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Multivariable polynomial factoring

Factor as the product of four polynomials of degree 1, each of which has a positive coefficient of .

So far, I've factored it out to be but how am I supposed to factor it so that way is always positive? Does anyone read more ..

Guest Jan 25, 2020, 8:58:08 PM

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help, confusion

Ten points are chosen on a circle. A line segment is drawn between every pair of chosen points.
Every time two line segments intersect inside the circle, that intersection point is marked red. What is the largest number of points that can be marked red? read more ..

Guest Jan 25, 2020, 8:33:18 PM

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Please help

Write a^4-3a^2+9 as a product of two monic quadratics with integer coefficients.

I don't understand how to do this
Thank you read more ..

Guest Jan 25, 2020, 6:25:15 PM

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help

The sun subtend an angle at 35degree from the centre of the earth whose distant from the centre of the earth is 382,100km. find the diameter of the sun

Guest Jan 25, 2020, 6:03:54 PM

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I need help

For how many ordered pairs of positive integers (x,y) does the 1/x + 2/y =1/3 equation hold?

Write a^4-3a^2+9 as a product of two monic quadratics with integer coefficients?

Thank You! read more ..

Guest Jan 25, 2020, 5:37:26 PM

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help

Charles has already broken 14 eggs, and he's breaking eggs at a rate of 12 per minute. Louis has already broken 22 eggs, and he's breaking eggs at a rate of 10 per minute. How many minutes will it take Charles to have broken as many eggs as Louis? read more ..

Guest Jan 25, 2020, 5:05:46 PM

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