All Questions

621

math

If angle A and angle B are supplementary angles and angle A is nine times as large as angle B, find the measures of angle A and angle B.

off-topic

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Guest Mar 5, 2020

1114

A worker can build a fence in 8 hours. with help of an assistant, the fence can be built in 5 hours. how long should it take the assistant

A worker can build a fence in 8 hours. with help of an assistant, the fence can be built in 5 hours. how long should it take the assistant, working alone, to build the fence?

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Guest Mar 5, 2020

704

help!!!

A pleasure boat traveling down the Red River takes the same time to go 14 miles upstream as it takes to go 16 miles downstream. if the current of the river is 2 miles per hour, find the speed of the boat in still water.

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Guest Mar 5, 2020

850

please help

Asha and Lucy are selling pencils in a school shop. They sell boxes of pencils and single pencils. Asha sells 7 boxes of pencils and 22 single pencils. Lucy sells 5 boxes of pencils and 2 single pencils. Asha sells twice as many pencils as Lucy. Work out read more ..

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Guest Mar 5, 2020

701

Question on Venn Diagrams

n[A ∪ (B ∩ C)]

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Guest Mar 5, 2020

408

math

help

Guest Mar 5, 2020

1403

math

Simon wants to earn as many points as possible in one turn in a game. Two number cubes whose sides are numbered 1 through 6 are rolled. He is given two options for the manner in which points are awarded in the turn. OPTION A: If the sum of the rolls is read more ..

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Guest Mar 5, 2020

1093

algebra, i think

In a group of kangaroos, the two lightest kangaroos weigh 25% of the total weight of the group. The three heaviest kangaroos weigh 60% of the total weight. How many kangaroos are in the group?

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Guest Mar 5, 2020

709

+511

Need Help

A researcher randomly surveyed seniors at a high school and asked how many books they read in the past year. The table shows the results.

Which read more ..

kikidylm Mar 5, 2020

737

+511

Help Please

In a random sample of 80 students in first grade, the mean hours of sleep per night was 9.4 with a standard deviation of 0.41. In a random sample of 50 students in 12th grade, the mean hours of sleep per night was 7.5 with a standard deviation of 0.52. read more ..

kikidylm Mar 5, 2020

381

please help

4 different mathematic books and 5 different science books are to be arrange on the shelf.How many possible arrangement can be made if:
a. The books on the same subjects are to be arrange together?
B. The books are to be arrange alternately? read more ..

Guest Mar 5, 2020

623

+511

Need Some Help

In a random sample of 44 downloadable books from a website, the mean cost is $8.58 with a standard deviation of $2.09.
Which interval is the 95% confidence interval for the mean cost of all the downloadable books on the website?

($7.96, read more ..

kikidylm Mar 5, 2020

3833

please help with homework.

When Hiroto is writing, there is 0.92 probability that there will be no spelling mistakes on a page. One day, Hiroto writes an essay that is 11 pages long. Assuming that Hiroto is equally likely to have a spelling mistake on each of the 11 pages, what is read more ..

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Guest Mar 5, 2020

906

nedd help with probability, this is impossible

At a certain gas station, 40% of the customers use regular unleaded gas (A1), 35% use midgrade unleaded gas (A2), and 25% use premium gas (A3). Of those customers using regular gas, only 30% fill their tank (event B). Of those customers using extra gas, read more ..

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Guest Mar 5, 2020

1801

What is the exact value of sin(cos^−1(−2√2))+tan^−1(sin(π/2))?

What is the exact value of sin(cos^−1(−2√2))+tan^−1(sin(π/2))?

A)−2√2−π
_____ read more ..

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Guest Mar 5, 2020

466

i'm confused

Among 150 IRS employees in a large city, only 30 are women. If 10 of the employees are chosen at random to provide free tax assistance for the residents of this city, find the probability that 4 or more women are selected.

Guest Mar 5, 2020

538

please help

An animal shelter spends $5.50 per day to care for each cat and $8.00 per day to care for each dog. Angel noticed that the shelter spent $54.00 caring for cats and dogs on Monday. Angel found a record showing that there were a total of 8 cats and dogs on read more ..

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Guest Mar 5, 2020

2126

What is the equation of the midline of the function f(x)=5.6sin(2.6x−2.9)−4.2?

What is the equation of the midline of the function f(x)=5.6sin(2.6x−2.9)−4.2?
y=−4.2
y=−2.9
y = 1.8 read more ..

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Guest Mar 5, 2020

1045

help needed

A store carries chocolate, vanilla, peppermint, and lemon candies. One day, the store clerk notices that he has fifteen candies total. Furthermore, the number of peppermint and lemon candies together is twice the number of chocolate and vanilla candies read more ..

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Guest Mar 5, 2020

615

-5 _/75 - sqrt 3

-5 Squareroot75 - sqrt 3

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Guest Mar 5, 2020

579

simplest radical form

simplest radical form square root of 180

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Guest Mar 5, 2020

677

applying the pythagorean theorem task card

a 10 ladder is leaning against a wall. if the foot of the adder is 3 from the wall,how high up the wall does the top of the ladder reach? Round to the nearest foot

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Guest Mar 5, 2020

764

+251

Round error? units not right?

Hi there,

Having a bit of a problem with this one; hope you can help.
read more ..

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vest4R Mar 5, 2020

528

Help

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Guest Mar 5, 2020

All Questions ⁺⁰237795 Questions

math

A worker can build a fence in 8 hours. with help of an assistant, the fence can be built in 5 hours. how long should it take the assistant

help!!!

please help

Question on Venn Diagrams

math

math

algebra, i think

Need Help

Help Please

please help

Need Some Help

please help with homework.

nedd help with probability, this is impossible

What is the exact value of sin(cos^−1(−2√2))+tan^−1(sin(π/2))?

i'm confused

please help

What is the equation of the midline of the function f(x)=5.6sin(2.6x−2.9)−4.2?

help needed

-5 _/75 - sqrt 3

simplest radical form

applying the pythagorean theorem task card

Round error? units not right?

Help

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