PLZ help

Alice, Bob, and Carrie can all choose a number from 1 to 10 (inclusive)
Find the number of ways they can choose their numbers, if all three numbers are
different.

720 ways

Step-by-step explanation:

We have a total of 10 numbers and 3 selections:

When Alice chooses, she has 10 possible numbers to choose.

When Bob chooses, he has 9 possible numbers to choose (because one has already ben selected)

When Carrie chooses, she has 8 possible numbers to choose (because two numbers had already been selected)

The number of combinations is equal to the product of the number of options for each selection:

C = 10*9*8 = 90*8 = 720

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w

she will sew have sewn five dresses   and be 1/3 done with the sixth one in an hour.

step-by-step explanation:

3/4 of an hour=45 mins

lucy makes 1 dress per 11.25 minutes

45 mins+11.25 mins=56.25 mins

60 mins- 56.25 mins=3.75 mins

3.75 mins is 1/3 of of 11.25 mins

therefore she the other 1/3 would be part of the hour and she will have sewn 5 dresses and begun the sixth.

contact me if you have any questions you are welcome.