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158

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Help with parallelogram
In the diagram below, PQRS is a parallelogram with a perimeter of 26 and an area of 28. What is the perimeter of rectangle OSTQ? Include an explanation of how you solved the problem.

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Guest Apr 17, 2023

130

Help I need it

I have no idea here
Sam writes down the numbers 1, 2, 3, ..., 99
(a) How many digits did Sam write, in total?
(b) Sam chooses one of the digits written down, at random. What is the probability that read more ..

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Guest Apr 17, 2023

152

Please help as fast as you can. Thanks.

What is the area of a octagon with a side length of 12cm. This octagon also has an apothem of 14.49cm.

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Guest Apr 17, 2023

132

Angle bisectors

Help please help help
In triangle AB, let the angle bisectors be BY and CZ. Given AB = 16, AY = 16, and CY = 16, find BC and BZ.

Guest Apr 17, 2023

153

Speedy answers pls

After a long hot, dry spell, the water level in Malik's swimming pool is getting so low that his pool pump is in danger of starting to suck air. He needs to top the level up by 8 cm. He runs a hose into the pool from his house cold water supply. The read more ..

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Hullo Apr 17, 2023

173

Speedy answer please

A small radio transmitter broadcasts in a 54 mile radius. If you drive along a straight line from a city 71 miles north of the transmitter to a second city 66 miles east of the transmitter, during how much of the drive will you pick up a signal from the read more ..

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Guest Apr 17, 2023

157

can anyone help me here?

For the triangle below, let x be the area of the circumcircle, and let y be the area of the incircle. Compute x - y.

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Guest Apr 17, 2023

116

+20

Pythagorean Words and Shapes Homework

Braden would have to drive due north to get to his parents' house and due east to get to his grandparents' house. I is 15 miles fron Braden's house to his parents' house and a straight-line distance of 17 miles form his parents' house to his granparents' read more ..

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LM2027 Apr 17, 2023

164

Help needed

How do I do this
What is the smallest distance between the origin and a point on the graph of y = 1/2*(x^2 - 18)?

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Guest Apr 17, 2023

157

help i need help

How many solutions are there to the equation u+v+w+x+y+z=10
where u, v, w, x, y, and z are nonnegative integers, and x is at most 2?

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Guest Apr 17, 2023

138

max

When doing laundry it takes 30 minutes to do a wash, 60 minutes to dry and 10 minutes to fold. Enter an integer that represents the maximum length of time, in minutes, that can be saved by pipelining these tasks if you have four loads of laundry to do. read more ..

Guest Apr 17, 2023

136

What is the smallest integer $b > 3$ for which the base $b$ number $23_b$ is a perfect square?

What is the smallest integer for which the base number is a perfect square?

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Guest Apr 17, 2023

158

Irrational numbers

How can I prove that a number is irrational?
Let r be a root of x^3 - 2x + 5 = x^3 - x^2 + 9. Show that none of r, r^2, or r^3 is irrational.

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Guest Apr 17, 2023

161

HELP!

In triangle ABC, AB = 15, BC = 20, and AC = 20. Find the length of the shortest altitude in this triangle.

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Guest Apr 17, 2023

156

Interpret quadratic

Genesis kicks a football. Its height in feet is given by h(t)= -16t^2+48th(t)=−16t 2 +48t where tt represents the time in seconds after kick. What is the football’s greatest height?

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Guest Apr 17, 2023

170

+62

A sample of a radioactive substance is left alone for 100 days. After these 100 days, it is observed that only 80% of the original sample i

A sample of a radioactive substance is left alone for 100 days. After these 100 days, it is observed that only 80% of the original sample is left. What is the half-life of the substance?

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Tacoflea Apr 17, 2023

163

plz help plz

In the diagram below, SR = PQ = 20 and RT:TS = 2:13. Find UV.

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Guest Apr 17, 2023

128

i need help with this

Let n be a positive integer. Let k be a positive integer.
(a) Using a counting argument, show that C(n - 1, k - 1) + C(n - 1, k) = C(n,k).
(b) Using a counting argument, show that C(n,0) + C(n,1) + C(n,2) read more ..

Guest Apr 17, 2023

140

plz help i need help

Determine the number of ways of choosing three points from the grid below, so that they form an isosceles right triangle.

Guest Apr 17, 2023

136

Help quick

plz help!
In triangle PQR, M is the midpoint of PQ. Let X be the point on QR such that PX bisects angle QPR, and let the perpendicular bisector of PQ intersect AX at Y. If PQ = 36, PR = 22, QR = 26, and read more ..

Guest Apr 17, 2023

154

Altitudes

I need help with altitudes
Triangle ABC has altitudes AD, BE, and CF. If AD = 12, BE = 18, and CF is a positive integer, then find the largest possible value of CF.

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Guest Apr 17, 2023

141

help angles

Angle bisectors AX and BY of triangle ABC meet at point I. Find angle C in degrees, if angle AIB= degrees.

Guest Apr 17, 2023

148

plz help help

I am stuck on this:
In square ABCD, P is on BC such that BP = and PC = , and Q is on CD such that BQ = and QC = . Find sin angle PAQ.

Guest Apr 17, 2023

155

+132

PreCalc Help Please!

Let $\mathbf{A}$ and $\mathbf{B}$ be matrices, and let $\mathbf{x}$ and $\mathbf{y}$ be vectors such that neither is a scalar multiple of the other satisfying \[\mathbf{A} \mathbf{x} = \mathbf{y}, \mathbf{A} \mathbf{y} = \mathbf{x} + 2\mathbf{y}\]and \[\mathbf{B} read more ..

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Saphia1123 Apr 17, 2023

All Questions ⁺⁰237784 Questions

Need help fast

Help I need it

Please help as fast as you can. Thanks.

Angle bisectors

Speedy answers pls

Speedy answer please

can anyone help me here?

Pythagorean Words and Shapes Homework

Help needed

help i need help

max

What is the smallest integer $b > 3$ for which the base $b$ number $23_b$ is a perfect square?

Irrational numbers

HELP!

Interpret quadratic

A sample of a radioactive substance is left alone for 100 days. After these 100 days, it is observed that only 80% of the original sample i

plz help plz

i need help with this

plz help i need help

Help quick

Altitudes

help angles

plz help help

PreCalc Help Please!

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