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2 years ago

Which expression could be used to determine the product of -4 and 35?

Mathematics

1 answer:

stealth61 [152]2 years ago

7 0

Answer:(-4)(3)+(-4)(1/4) B. Is your answer.

Step-by-step explanation:

-4 • 3 1/4 = -13

A= 12

B= -13

C= -9

D= -45/4.

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Deidre is picking out some movies to rent, and she is primarily interested in documentaries and children's movies. She has narro

exis [7]

Answer: 6630

Step-by-step explanation:

Given , Number of documentaries = 17

Number of children's movies = 20

Total movies = 17+20=37

Number of combinations of r things taken out of things = $^nC_r=\dfrac{n!}{r!(n-r)!}$

Now, the number of different combinations of 3 movies can she rent if she wants at least one documentary

= (1 documentary+2 children's movies , 2 documentary+1 children's movies , 3 documentary+0 children's movies)

$=^{17}C_1\times^{20}C_{2}+^{17}C_2\times^{20}C_{1}+^{17}C_3\times^{20}C_{0}$

$=(17)\times\dfrac{20!}{2!18!}+\dfrac{17!}{2!15!}\times(20)+\dfrac{17!}{3!14!}(1)\\\\=3230+2720+680=6630$

Hence, the number of different combinations of 3 movies can she rent if she wants at least one documentary is 6630 .

3 0

3 years ago

Your friend rolls a number cube 500 times, how many times do you think an odd number will be rolled?

Mila [183]

250, and this is because of probability. Since half of the numbers are odd numbers, and half are even. It would be hard to determine, your probability would be 1/2. 1/2 of 500 is going to be 250.

3 0

3 years ago

A local gym has 2 types of cardio machines, treadmills and elliptical machines. There are 38 cardio machines in all. There are 1

Brilliant_brown [7]

Answer:

14 elliptical machines

Step-by-step explanation:

t = # of treadmills

e = # of elliptical machines

t + e = 38

t = e + 10

Substitute:

e + 10 + e = 38

2e = 28

e = 14

6 0

3 years ago

A large bucket that is full has a small leak on the bottom. The bucket loses water at the rate of 0.75 gallons per minute. After

Marta_Voda [28]

Answer:

Step-by-step explanation:

Multiply 8×.75 (6)

Add that to 21

8 0

2 years ago

Which statement is correct? (If you can answer 1 and 3 it would help a lot too)

Lera25 [3.4K]

Answer:

the answer is 3 because 1x3=3

5 0

3 years ago