Working alone, Dan can sweep a porch in 15 minutes. Alberto can sweep the same porch in 11 minutes. If they worked together how long would it take them?

Working alone, Dan can sweep a porch in 15 minutes. Alberto can sweep the same porch in 11 minutes. If they worked together how long would it take them?

John and Jose each improved their yards by planting grass sod and geraniums. They bought their supplies from the same sore. John spent $84 on 12ft^2 of grass sod and 5 geraniums. Jose spent $140 on...

Please show me how to solve

Bar model too please

A pitcher throws 16 strikes in her first 38 pitches. The table shows how the pitcher’s strike percentage changes if she throws x consecutive strikes after the first 38 pitches. The table shows how...

this is a hard problem I can't solve can u help me pls

Pleas help! Not sure how to do this

An inlet pipe on a swimming pool can be used to fill the pool in 30 hours. The drain pipe can be used to empty the pool in 48 hours. If the pool is 1/5 filled and then the inlet pipe and drain pipe...

1. (sec x-1)(sec x+1) = tan2x 2. cot 2θ = cot2 θ-1 -------------...

Shayla bought 18 books for $139. She paid $5 for paperbacks and $12 for hardback books. How many hardback books did she buy?

This problem involves the Rule of 70, which gives quick estimates of the doubling time of an exponentially growing quantity. If r% is the annual growth rate of the quantity, then the Rule of 70 says Doubling...

The City Electric System(CES) recently constructed a major transmission line along parts of South Street in the city. The transmission lines are strung between power poles and the hanging lines form...

The federal building is as much taller than the state building as the state building is taller than the city building. If federal building is 160 ft tall and city is 80 ft tall. How tall is state...

The vertices of a quadilatetal are a(-5, 3), b(2, 2), c(4, -3), and d(-2, 2). How can you use slope to determan whether the qudilateral is a parrolelagram?

when a box of chocolates was full it weighed 1.1 kg. After half of the chocolates were eaten, the box (with the remaining chocolates) weighed .7 kg. How much did the box weigh without the chocola...

You buy 100 candy bars. Some cost $1, some cost $1.50. If they cost $140 total, how many $1 candy bars? I have to write an equation and solve.

Billie is 4 years older than his sister. Seven years ago Billie was 3 times his sisters age. How old is Billie's sister now?

Lisa is 3 times as old as Maggie. The difference in their ages is 12 years. What are their ages?

Modeling quadratic functions. Zeroes are -.92 and 3.42.

The ratio is 14 boys to 3 gulls. 4 times the number of gulls was six less than the number of boys. How many gulls were there?

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