All Questions

503

help please

For what values of y does the following equation have no solutions for x?

xy+5y+4x+20=1

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Guest Feb 24, 2021

Feb 23, 2021

506

+20

I Need Help

Two consecutive numbers in a geometric sequence are 12 and 15.

a) Determine the common ratio.
read more ..

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Nimrod Feb 23, 2021

483

function

Let
\[f(x) = \begin{cases} 3x + 5 &\text{if }x<-3, \\ 7+4x&\text{if }x\ge -3. \end{cases}\]
Find f(5).

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Guest Feb 23, 2021

476

quadratic roots

Let r and s be the roots of 3x^2 + 4x + 12 = x^2 + 5x + 1. Find r^2 + s^2.

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Guest Feb 23, 2021

596

+130

Geometry please help :)

Let AC be Perpendicular to CE. Connect A to the midpoint D of CE and connect E to the midpoint B of AC. AD and EB intersect at point F, and BC = 7 inches, CD=9 inches. Find the area of DFE in square inches.

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HelpPls123abc Feb 23, 2021

537

probability

Leslie has a set of 8 cards numbered 1 to 8. She randomly selects 2 cards one at a time WITHOUT replacement. What is the probability that she selects an odd number first and then an even number?

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Guest Feb 23, 2021

499

Least common multiple

What is the least common multiple 8 and 15

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Guest Feb 23, 2021

486

algebra

If we are given x such that 25^x - 9^y = 16 and 5^x - 3^y = 2, find x + y.

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Guest Feb 23, 2021

514

complex numbers

There are 3 complex numbers a + bi, c + di, and e + fi. If b = 7, e = -a - c, and the sum of the numbers is -3i, find d + f.

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Guest Feb 23, 2021

611

What is the exact value of the expression?

What is the exact value of the expression?

tan(π3)+ cos(5π6) · sin(−3π/4)

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Guest Feb 23, 2021

618

Please Help Homework

What is the measure of the reference angle for the angle measure?
Drag a reference angle measure into each box to match the angle measure. Drag measures of the same angle measure unit.

17π/5 read more ..

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Guest Feb 23, 2021

496

+14

y=-x

Im just checking to see if this is correct and if not, please help?

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fallynb06 Feb 23, 2021

556

+14

Reflection y=-x, y=2,x=7, y=x

Those are all the problems that I can't figure out.

y=x (is this corect?)
S (-6,1)
T (-6,8)
U (-3,9) read more ..

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fallynb06 Feb 23, 2021

481

pls halp?? :<

Given that $x$ is real and $x^3+\frac{1}{x^3}=52$, find $x+\frac{1}{x}$.

tysm!!!

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Guest Feb 23, 2021

542

coordinates

On a Cartesian coordinate plane, points (1,2) and (7,-4) are opposite vertices of a square. What is the area of the square?

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Guest Feb 23, 2021

541

coordinates

You connect the points (0, 0) and (9, 6) with a line segment. Starting at (0, 0), you move 1/4 of the way along the segment. What is the sum of the coordinates of the point you land upon?

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Guest Feb 23, 2021

508

Question

$140 to 18²

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Guest Feb 23, 2021

604

I need help understanding

I need help understand

_____

WRITE YOUR OWN read more ..

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Guest Feb 23, 2021

562

+62

Help!

Find all values of such that

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MysticBoba Feb 23, 2021

395

counting problem

How many 4-digit numbers have the second digit even and the fourth digit even? (Here, digits are read from the left, so the first digit is the leftmost digit, and so on.)

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Guest Feb 23, 2021

594

+75

Let where and and are relatively prime positive integers. Find the smallest possible value of

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Destryox Feb 23, 2021

483

Pythagorean theorem

Two airplanes leave the same airport. One heads north, and the other heads east. After some time, the northbound airplane has traveled 72 kilometers. If the two airplanes are 97 kilometers apart, how far has the eastbound airplane traveled?
read more ..

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Guest Feb 23, 2021

678

probability

Two different integers are randomly chosen from the set
{5, 8, 7, 4, -2}
What is the probability that their product is negative? Express your answer as a common fraction.

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Guest Feb 23, 2021

554

Two runners start running at the same time

Two runners start running at the same time from the start/finish line of a 400 meter oval track. One runner run laps of 1 minute 15 seconds and the other runs laps of 1 minute 45 seconds. How long will it be before the runners cross the start/finish line read more ..

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Guest Feb 23, 2021

All Questions ⁺⁰238403 Questions

help please

I Need Help

function

quadratic roots

Geometry please help :)

probability

Least common multiple

algebra

complex numbers

What is the exact value of the expression?

Please Help Homework

y=-x

Reflection y=-x, y=2,x=7, y=x

pls halp?? :<

coordinates

coordinates

Question

I need help understanding

Help!

counting problem

Let where and and are relatively prime positive integers. Find the smallest possible value of

Pythagorean theorem

probability

Two runners start running at the same time

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