All Questions

282

quadratic

The equation y = -16t^2 + 28t + 180 describes the height (in feet) of a ball tossed up in the air at 28 feet per second from a height of 180 feet from the ground. In how many seconds will the ball hit the ground?

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Guest Oct 24, 2022

262

Solve X

(2+2) x (4/1) = X

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Guest Oct 24, 2022

285

Containers A and B have leaks. Container A has 800ml of water and is leaking 7ml per minute. Container B has 1200ml and is leaking 12ml per

Containers A and B have leaks. Container A has 800ml of water and is leaking 7ml per minute. Container B has 1200ml and is leaking 12ml per minute. After how many minutes will the two containers have the same amount? What is that amount?

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Guest Oct 24, 2022

263

+96

We have two squares. The ratio of the perimeter of the big square to the perimeter of the little square is 5 : 2. What is the ratio of the a

We have two squares. The ratio of the perimeter of the big square to the perimeter of the little square is 5 : 2. What is the ratio of the area of the big square to the area of the little square?

I don't know where read more ..

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coolkidslovemath1982 Oct 24, 2022

215

Number Theory

How many different positive integers divisible by 4 can be formed using at least one of the digits 1, 2, 3, 4, and 6 exactly once and no other digits? For example, 12 counts, but 512 does not.

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Guest Oct 24, 2022

192

sinusoidal function

Write a sinusoidal function that has a period of 4pi, amplitude 2, and passes through (pi, 2).

Guest Oct 24, 2022

-1

260

factoring

how would i factor this? x^2+16x=22. is the gcf x^2 or 2

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Guest Oct 24, 2022

186

Quadratic equations

Find the largest possible value of x in the simplified form x=\frac{a+b\sqrt{c}}{d} if 5x/6 +1= 3/x - 1 + 5 + 2x/3, where a,b,c, and d are integers. What is acd/b?

Guest Oct 24, 2022

232

Help is much appreciated

60 bricklayers began a 16-day project to build a castle. After five days, five of the bricklayers quit the job. If they work the same amount each day, how many extra day(s) (beyond the original estimate of 16) will the remaining bricklayers need? read more ..

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Guest Oct 24, 2022

184

quadratic

One of the five quadratics below has a repeated root. (The other four have distinct roots.) What is the repeated root?

-x^2 + 18x + 81
3x^2 - 6x + 9 read more ..

Guest Oct 24, 2022

192

Algebra

The real numbers x, y and z satisfy the equations x + 2y + 3z = 950 and 3x + y = 1450 and 2y + z = 1880. What is the average of x, y and z

Guest Oct 24, 2022

225

counting

Six children are each offered a single scoop of any of 3 flavors of ice cream from the Combinatorial Creamery. In how many ways can each child choose a flavor for their scoop of ice cream so that each flavor of ice cream is selected by at least two children? read more ..

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Guest Oct 24, 2022

276

help geometry

Two rectangles overlap, as shown below. Find the area of the overlapping region (which is shaded) if AB = BE = 2 and AD = ED = 4.

read more ..

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Guest Oct 24, 2022

261

الواجب السادس

س -3 = -4

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Guest Oct 24, 2022

274

Algebra

Sam and Ella each drive the same number of miles per year.
Sam switches from a car that gets 26 miles per gallon to a car that gets 36 miles per gallon. Ella
switches from a car that gets 12 miles per gallon to a car that gets 34 miles per read more ..

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Guest Oct 24, 2022

201

complex number

Let z be a complex number satisfying 2z + 3 \overline{z} = -25 - 2i + 3z - 8 \overline{z}. What is the value of z?

Guest Oct 24, 2022

194

Algebra

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

Guest Oct 24, 2022

200

algebra

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 Oct 24, 2022

290

Find the inverse.

find the inverse of f(x)=8(x-1)

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Guest Oct 24, 2022

205

algebra

Let's take a look at (x + y)^2 (x - y)^2 and (x^2 + y^2)(x^2 - y^2). While Beeker believes that these two expressions are equal for all real numbers x and y Clod believes they are not! Let's get to the bottom of this!
a) Evaluate read more ..

Guest Oct 24, 2022

185

plz help

Consider the two expressions (6x^3 + 9x^2 + 4x + 7 - 17x^2 - 8x + 8)/(2x + 3 - 7x - 11) and 4x^2 - 7 + 1/(2x + 3 - 7x - 11)
a) Show that the two expressions represent equal numbers when x = 10
b) Explain why these two expressions do not represent read more ..

Guest Oct 24, 2022

271

Algebra

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

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Guest Oct 24, 2022

184

Algebra

Let c be a real number, and consider the system of quadratic equations
y = 6x^2 - 9x + c - x^2 - x
y = 5x^2 - 3x + x^2 + 2x

For which values of c does this system have:
(a) Exactly one real solution (x,y)
(b) More than read more ..

Guest Oct 24, 2022

280

help

The height (in meters) of a shot cannonball follows a trajectory given by h(t) = -4.9t^2 + 14t - 0.4 at time t (in seconds). For how many seconds is the height of the cannonball at least 6 meters?

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Guest Oct 24, 2022

204

Find the length of $\overline{AB}$ . A triangle A C E. Sides A C and C E contain points B and D respectively. A segment

Help me find the answer plzzz .Find the length of $\overline{AB}$ . A triangle A C E. Sides A C and C E contain points B and D respectively. A segment connects points B and D such that line segment B D is parallel to side A E. Line segments B C labeled read more ..

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Guest Oct 24, 2022

All Questions ⁺⁰237827 Questions

quadratic

Solve X

Containers A and B have leaks. Container A has 800ml of water and is leaking 7ml per minute. Container B has 1200ml and is leaking 12ml per

We have two squares. The ratio of the perimeter of the big square to the perimeter of the little square is 5 : 2. What is the ratio of the a

Number Theory

sinusoidal function

factoring

Quadratic equations

Help is much appreciated

quadratic

Algebra

counting

help geometry

الواجب السادس

Algebra

complex number

Algebra

algebra

Find the inverse.

algebra

plz help

Algebra

Algebra

help

Find the length of $\overline{AB}$ . A triangle A C E. Sides A C and C E contain points B and D respectively. A segment

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