All Questions ⁺⁰188174 Questions

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number theory questions

Find all ordered pairs (m,n) of integers such that

(m^2 -4 ) (n^2 -4) +m+n =2021

Guest Jan 23, 2021

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Write 2020^2021 -2020^1011+2020 as a sum of two perfect squares

Write 2020^2021 -2020^1011+2020 as a sum of two perfect squares

Guest Jan 23, 2021

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43

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can you help me with this question

•Hamdah works mowing lawns and babysitting. She earns $8.90 an hour for mowing and $7.20 an hour for babysitting. How much will she earn for 7 hours of mowing and 1 hour of babysiting

Guest Jan 23, 2021

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109

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solid mensuration

The volume of the apple juice in a glass whose shape is an inverted frustum of a cone is 1176π mm³. The depth of the juice is 18mm.
Find the radius of the lower base if the product of its radii is 60 mm². *

a.5 mm read more ..

Guest Jan 23, 2021

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60

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am very stuck

Let $n$ be a positive integer greater than or equal to $3$. Let $a,b$ be integers such that $ab$ is invertible modulo $n$ and $(ab)^{-1}\equiv 2\pmod n$. Given $a+b$ is invertible, what is the remainder when $(a+b)^{-1}(a^{-1}+b^{-1})$ is read more ..

Guest Jan 23, 2021

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+110

right angle trig question

ABCD is a regular tetrahedron (right triangular pyramid). If M is the midpoint of line CD, then what is tan(angleAMB)?

geoNewbie21 Jan 23, 2021

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93

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solid mensuration

The volume of a conical frustum is 2401π cu. cm. If the radius of the lower base is 14 cm and the altitude is 21-cm.
Calculate the lateral area of the conical frustum. *

a.1452 sq. cm read more ..

Guest Jan 23, 2021

+1

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help math

A square sheet of paper ABCD is folded such that B falls on the midpoint M of CD. In what ratio does the crease divide BC?

Guest Jan 23, 2021

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math help

Math help: An international food festival charges for admission and for each sample of food. Admission and 4 samples cost $ 6.75. Admission and 9 samples cost $ 11.75. Write a linear function rule read more ..

Guest Jan 23, 2021

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+6

PLEASE I NEED HELP

In the triangle ABC,m(∠BAC)=85∘, AD⊥BC,D∈BC,(AM)≅(MC),M∈(AC) Lines AD and BM intersect in P. If the triangle ABP is an isosceles triangle and BD=1/2 AC find the measures of angles B and C

PlzHelpMeOut Jan 23, 2021

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57

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+269

Tony and his grandma's hike

Tony and his grandma went hiking together. Grandma was slow but steady and maintained the same speed throughout. Tony accompanied grandma at her pace forthe first 30 minutes. Then he walked ahead for the next 20 minutes at 4 miles an hour. And the next read more ..

Potatobird Jan 23, 2021

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x-y coordinates

Two sides of a square lie on the straight lines:-
\[2x+3y+7=0\]
And
\[2x+3y+11=0\]

What is the area of the square?

Guest Jan 23, 2021

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54

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+269

John's Family trip

San Francisco is approximately 60 miles from San Jose. John’s family travelled from San Francisco to San Jose averaging 40 miles per hour, but on the way back, due to heavy traffic, they only averaged 24 miles per hour. What is the average speed of the read more ..

Potatobird Jan 23, 2021

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44

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How many rectangles are in this figure? Each angle is a right angle.

How many rectangles are in this figure? Each angle is a right angle.

Guest Jan 23, 2021

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61

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help with algebra

Rationalize the denominator of $\frac{1}{\sqrt{2} + \sqrt{5} + \sqrt{7}}$.

Guest Jan 23, 2021

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77

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I don't know how to solve :<

The volume of the apple juice in a glass whose shape is an inverted frustum of a cone is 1176π mm³. The depth of the juice is 18mm.Find the radius of the lower base if the product of its radii is 60 mm².

Guest Jan 23, 2021

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Please help :(

The volume of a conical frustum is 2401π cu. cm. If the radius of the lower base is 14 cm and the altitude is 21-cm.Calculate the lateral area of the conical frustum.

Guest Jan 23, 2021

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57

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help help

The pink circle with center D is tangent to the blue, green and red semicircles with centers B, C and A respectively as shown above. If the blue and green semicircles have radii 2 and 1 respectively, find the radius of the pink circle.
read more ..

Guest Jan 23, 2021

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Help! Algebra - Factoring Trinomials

1.) 2z^2 - 7z + 5

2.) 9y^2 + 30yw + 25w^2
read more ..

Guest Jan 23, 2021

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61

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trapezoid

A isosceles trapezoid has a base of length 12 and a top of length 4 . Find its height (length of the red line) if $ AC \perp BD $.

read more ..

Guest Jan 23, 2021

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40

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please help

Points $E$, $F$, $G$, and $H$ lie on a line in that order. If $EG=\frac{5}{3}EF$ and $HF=5FG$, then what is $\frac{EF}{HG}$?

read more ..

MooMooooMooM ●

Guest Jan 23, 2021

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help with algebra

Solve the equation: ${ 2 }^{ x }+{ 2 }^{ x+1 }+{ 2 }^{ x+2 }+{ 2 }^{ x+3 }=\frac { 15 }{ 2 }$.

Guest Jan 23, 2021

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+145

Number theory help

An integer is said to be square-free if the only perfect square that divides is . How many positive odd integers greater than 1 and less than are square-free?

Jmaster10 Jan 23, 2021

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regular octagon

What fraction of the regular octagon is shaded blue?

Guest Jan 23, 2021

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