All Questions ⁺⁰230715 Questions

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polygon

Let B, A, and D be three consecutive vertices of a regular -gon. A regular heptagon is constructed on line AB with a vertex C next to A. Find angle BCD in degrees.

Guest Jun 3, 2023

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if 30 cents is 1 how much is 3$

if 30 cents is 1 how much is 3$

Guest Jun 3, 2023

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48

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sum

The sum $1^2 + 2^2 + 3^2 + 4^2 + \cdots + n^2 = n(n+1)(2n+1) \div 6$. What is the value of $21^2 + 22^2 + \cdots + 40^2 + 41^2 + ... + 100^2$?

Guest Jun 3, 2023

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need help quick

At a cafeteria, Mary orders two pieces of toast and a bagel, which comes out to $3.15. Gary orders a bagel and a muffin, which comes out to $3.50. Larry orders a piece of toast, two bagels, and three muffins, which comes out to $8.15. How many cents does read more ..

Guest Jun 3, 2023

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angles

In triangle $ABC,$ $\angle A = p + 2q$ degrees, $\angle B = 6p - 8q$ degrees, and $\angle C = 17p + 2q$ degrees. Find $p$ (in degrees).

Guest Jun 3, 2023

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+274

Help please!

Alex needs to catch a train. The train arrives randomly some time between 1:00 and 2:00, waits for 10 minutes, and then leaves. If Alex also arrives randomly between 1:00 and 2:00, what is the probability that the train will be there when read more ..

supremecheetah Jun 3, 2023

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Math Question

The equation $y = -6t^2 + 43t$ describes the height (in feet) of a projectile $t$ seconds after it is launched from the surface of Mars at $43$ feet per second. In how many seconds will the projectile first reach $77$ feet in height? Express your answer read more ..

Guest Jun 3, 2023

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Help asap with expected value

a) Suppose we have a bag with 10 slips of paper in it. Eight slips have 3 on them and the other two have 8 on them. How many 8's do we have to add to make the expected value equal to 6?
b) Suppose we have a bag with 10 slips read more ..

Guest Jun 3, 2023

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Help

Right triangle XYZ has legs of length XY = 12 and YZ = 6. Point D is chosen at random within the triangle XYZ. What is the probability that the area of triangle XYD is at most 24?

Guest Jun 3, 2023

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system

Need help with 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 = 15 read more ..

Guest Jun 3, 2023

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triangles

1. Find the area of triangle ABC if AB = 6, BC = 8, and angle ABC = 90 degrees.
2. If angle ABC = 135 degrees, and angle ACB = 30 degrees, what is angle BAC?

Guest Jun 3, 2023

Jun 2, 2023

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need help

Im having trouble with this
One ordered pair (a,b) satisfies the two equations ab^4 = 48 and ab = 72. What is the value of b in this ordered pair? (Note: you may have to use the Tab key to get your cursor into the middle answer box read more ..

Guest Jun 2, 2023

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bisectors

Help Im bad at geometry
In triangle AB, let the angle bisectors be BY and CZ. Given AB = 16, AY = 16, and CY = 16, find BC and BZ.

Guest Jun 2, 2023

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help me

In triangle ABC, point X is on side BC such that AX=13,BX=10,CX=10, and the circumcircles of triangles ABX and ACX have the same radius. Find the area of triangle ABC.

Guest Jun 2, 2023

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i need help

Plz help Im so confused
Find the number of ways of arranging the numbers 1,2 ,3, 4, 5, 6, 7, 8, 9 in a row so that the product of any two adjacent numbers is even.

Guest Jun 2, 2023

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plz help

I need to find the number of solutions
How many solutions are there to the equation
u + v + w + x + y + z = 7
where u, v, w, x, y, and z are nonnegative integers, and x is at most 2 or y is at least 3? read more ..

Guest Jun 2, 2023

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help help

Each unit square of the 4x4 grid below is to be filled in with the number 1, 2, 3 or 4, so that:
Each row contains the numbers 1, 2, 3, and 4 in some order,
Each column contains the numbers 1, 2, 3, and 4 in some order, and
Each square read more ..

Guest Jun 2, 2023

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help me with digits

Sophie's favorite number is a two-digit number. If she reverses the digits, the result is 36 less than her favorite number. Also, one digit is 3 more than double the other digit. What is Sophie's favorite number?

Guest Jun 2, 2023

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+4

Can someone help me figure this out

Kaitlen has $2.25 in nickels and dimes. The number of dimes is 5 less than twice the number of nickels. Find the number of nickels.

ksitzmann Jun 2, 2023

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+4

I have no clue how to solve. Plz give answer

Find a polynomial of degree such that both of these properties hold: f(x) is divisible by x^3. f(x)+2 is divisible by (x+1)^3. Write your answer in expanded form (that is, do not factor f(x)).

mynameissudevighosh Jun 2, 2023

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rate problem

I drove to the beach at a rate of 40 miles per hour. If I had driven at a rate of 36 miles per hour instead, then I would have arrived 20 minutes later. How many miles did I drive?

Guest Jun 2, 2023

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