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3 years ago

12

Dan can tile a floor in 3 hours. his assistant could tile the same floor in 8 hours. if they work together, how long will it tak

e to tile the floor?

1 answer:

natta225 [31]3 years ago

7 0

There is a formula for this:

Total Time = (worker1 * worker2) / (worker1 + worker2)

(3 * 8) / (3 + 8)

24 / 11 =

2.1818181818 hours

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Evaluate the summation of negative 5 n minus 1, from n equals 3 to 12..

NARA [144]

The summation of negative 5 n minus 1, from n equals 3 to 12 can be expressed as

n = 3/12

substitute the value of n to the equatio

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-5( 3/12 ) -1

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3 years ago

What’s the correct answer?

Sidana [21]

Convert 91% to a decimal:

$91 \div 100 = 0.91$

Multiply the amount of people by this decimal:

$1989 \times 0.91 = 1809.99$

Round the number to the nearest ones value:

1809.99

9 > 5

1809.99 -> 1810

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3 years ago

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Expand and simplify (x+5)(x-2)

salantis [7]

Answer:

${x}^{2} - x - 12 = (x + 3)(x - 4)$

${x}^{2} + 3x + 2 = (x + 2)(x + 1)$

${x}^{2} + 3x - 10 = (x + 5)(x - 2)$

Step-by-step explanation:

F [First terms] - Multiply the first terms in each set of parentheses FARTHEST TO THE LEFT

O [Outside terms] - Multiply the first term in the first set of parentheses FARTHEST TO THE LEFT by the last term in the second set of parentheses FARTHEST TO THE RIGHT

I [Inside terms] - Multiply the last term in the first set of parentheses FARTHEST TO THE RIGHT by the first term in the second set of parentheses FARTHEST TO THE LEFT

L [Last terms] - Multiply the last terms in each set of parentheses FARTHEST TO THE RIGHT

${x}^{2} - x - 12 = {x}^{2} - 4x + 3x - 12$

${x}^{2} + 3x + 2 = {x}^{2} + x + 2x + 2$

${x}^{2} + 3x - 10 = {x}^{2} - 2x + 5x - 10$

I am joyous to assist you anytime.

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3 years ago

PLEASE HELP FAST...The dot plots show the numbers of children’s books purchased by customers at two different bookstores on one

Katena32 [7]

Answer:

The mode of the data for Store 2 is greater than the mode of the data for Store 1.

Step-by-step explanation:

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What’s the system of y=x-4 and y=4x-10?

Natasha_Volkova [10]

Answer:

That is the system.

y = x - 4

y = 4x - 10

If you are looking for the solution then use the method of substitution or the method of elimination.

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3 years ago

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