All Questions

458

Simple algebra question

Someone please help. Learning geometric sequences. n represents a term in a geometric sequence.
How does one go from this
a(n)= 1/2 • 4n-1 To : a (n)= 1/8 • 4n
Do you divide or what do you do. I figured diving by 4 would read more ..

flemij Sep 29, 2020

755

HALP!

Laura will have seven test scores at the end of the semester. Each of the scores is a positive integer less than or equal to 100. Her first five scores are 80,83,87,94, and 96. How many different values are possible for the median of her read more ..

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Guest Sep 29, 2020

613

parabola

what is the equation of the following graph in vertex form?

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Guest Sep 29, 2020

1173

Jonathan’s class has 30 boys. Of the students in his class, 60% are girls. How many girls are in Jonathan’s class? A. 75 B. 60 C. 45 D.

Jonathan’s class has 30 boys. Of the students in his class, 60% are girls. How many girls are in Jonathan’s class? A. 75 B. 60 C. 45 D. 20 Jonathan’s class has 30 boys. Of the students in his class, 60% are girls. How many girls are in Jonathan’s class? read more ..

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Guest Sep 29, 2020

670

Jonathan’s class has 30 boys. Of the students in his class, 60% are girls. How many girls are in Jonathan’s class? A. 75 B. 60 C. 45 D.

Jonathan’s class has 30 boys. Of the students in his class, 60% are girls. How many girls are in Jonathan’s class? A. 75 B. 60 C. 45 D. 20

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Guest Sep 29, 2020

501

janaya shelton jean

how many times does 7/3 go into 14/15

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Guest Sep 29, 2020

889

algebra

A baseball is thrown upward at a velocity of 32 feet per second from a height of 7 feet. The equation to represent the height (h) after t seconds is h=−16t2+32t+7. How long before the ball hits the ground? (Round to the nearest hundredth read more ..

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Guest Sep 29, 2020

-1

631

+223

Pls help!

In triangle ABC, AB = BC = 25 and AC = 40. What is sin angle ACB?

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Noori Sep 29, 2020

552

help please

How many ways are there to put 4 indistinguishable balls in 3 distinsuishable boxes?

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Guest Sep 29, 2020

-1

639

+223

I dont get this...

I dont know why in the question posted here: https://web2.0calc.com/questions/cphill-i-need-geo-help one of the sides is tan 70. Could someone help me with this question?

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Noori Sep 29, 2020

498

geometry

Find the area of the triangle with side lengths sqrt(70), sqrt(70), and sqrt(28).

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Guest Sep 29, 2020

535

interest

A man invests his savings in two accounts, one paying 6% and the other paying 10% simple interest per year. He puts twice as much in the lower-yielding account because it is less risky. His annual interest is $2,640. How much did he invest at each rate? read more ..

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Guest Sep 29, 2020

531

The Euclidean Algorithm math help

For all positive integers n, the nth triangular number T_n is defined as T_n = 1+2+3+...+ n$. What is the greatest possible value of the greatest common divisor of 4T_n and n-1?

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Guest Sep 29, 2020

582

Decimals

What is the 453rd digit to the right of the decimal point in the decimal expansion of ?

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Guest Sep 29, 2020

654

Need help on how to calculate this ((-4a)-sqrt(4a))/(2a)=0.75

((-4a)-sqrt(4a))/(2a)=0.75
Explain step by step, how to calculate it

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Guest Sep 29, 2020

630

Keddy and Raj saved the same amount of money. After Keddy lent $22 to Raj, Raj had 5 times as much money as Keddy. How much did Raj have in

Keddy and Raj saved the same amount of money. After Keddy lent $22 to Raj, Raj had 5 times as much money as Keddy. How much did Raj have in the end?
Pls teach me how to do!

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Guest Sep 29, 2020

623

Help

An ambulance travels at 40 mph and can follow a 20-mile route making no stops to get to the hospital. A helicopter travels at one mile per minute, and the air route is 15 miles to get to the same hospital. However, the helicopter takes three minutes for read more ..

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Guest Sep 29, 2020

+10

672

+98

THIS IS OFF-TOPIC...

Hi all! So basically the AoPS staff doesn't want me to post anymore on this site (if it has anything to do with AoPS), so I'm rarely going to post from now on. Even if I were to post, it wouldn't be all of the steps to the the solution of a problem; it read more ..

off-topic

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joliel3 Sep 29, 2020

414

please help with this!

What is angle FEC?

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Guest Sep 29, 2020

927

please help

The school zone in front of your school has a posted speed limit of 25 mi/h, which is about 11 m/s. Let’s examine the stopping of a car in several different situations.
The driver is looking at her phone and has a total reaction time of 4.6 seconds read more ..

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Guest Sep 29, 2020

652

help please

If m1= (4x + 7), m2= (15x - 17), and m3 =(6x - 13)", thenfind the value of x.

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Guest Sep 29, 2020

576

geometry

Solve for a.

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Guest Sep 29, 2020

505

RECURSIVE SEQUENCES

The sequence a_n is defined by a_1 = 1/2 and a_n = a_{n - 1}^2 + a_{n - 1} for n greater than or equal to 2. Prove that 1/{a_1 + 1} + 1/{a_2 + 1} + ...+ 1/{a_n + 1} < 2 for all n greater than or equal to 1.

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Guest Sep 29, 2020

472

Circles and Triangles Help Please

Four circles with radii , , , and are externally tangent to one another, where is the smallest radius. Compute .

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Guest Sep 29, 2020

All Questions ⁺⁰238125 Questions

Simple algebra question

HALP!

parabola

Jonathan’s class has 30 boys. Of the students in his class, 60% are girls. How many girls are in Jonathan’s class? A. 75 B. 60 C. 45 D.

Jonathan’s class has 30 boys. Of the students in his class, 60% are girls. How many girls are in Jonathan’s class? A. 75 B. 60 C. 45 D.

janaya shelton jean

algebra

Pls help!

help please

I dont get this...

geometry

interest

The Euclidean Algorithm math help

Decimals

Need help on how to calculate this ((-4a)-sqrt(4a))/(2a)=0.75

Keddy and Raj saved the same amount of money. After Keddy lent $22 to Raj, Raj had 5 times as much money as Keddy. How much did Raj have in

Help

THIS IS OFF-TOPIC...

please help with this!

please help

help please

geometry

RECURSIVE SEQUENCES

Circles and Triangles Help Please

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