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gtnhenbr [62]
2 years ago
6

1. What is the binomial expansion of (x + 3)5? ​

Mathematics
1 answer:
lara [203]2 years ago
4 0

Answer:

5x + 15

Step-by-step explanation:

To expand the binomial, you need to multiply each term inside the parentheses by 5.

(x + 3)5

= (x * 5) + (3 * 5)

= 5x + 15

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Dave walked to his friend's house at a rate of 4mph and returned back biking at a rate of 10mph. If it took him 18 minutes longe
schepotkina [342]

Answer:

4 miles

Step-by-step explanation:

4 0
3 years ago
A cheetah ran 300 feet in 2.92 seconds. What was the cheetah’s average speed in miles per hour? Show your work.
Alchen [17]
You would divide the cheetahs distance which is 300 feet  by the cheetahs time which is 2.92 seconds 
distance÷time 
300÷2.92= 102.7 seconds or 103 seconds if you round up 
the cheetahs speed is 102.7 seconds or 103 seconds 

5 0
3 years ago
Applying the Segment Addition Postulate
blsea [12.9K]

Answer:

144

Step-by-step explanation:

Find: Length of segment BC

CD+DB=BC

3x+8+4x+10=BC

7x+18=BC

BC also equals 8x (given on the screen shot)

7x+18= 8x

x=18

18 times 8 = 144

Check:

3( 18) + 8 + 4(18) + 10

54+8 + 72+10

64+ 80= 144  TRUE

7 0
3 years ago
I know it’s hard to read, but if u can, please help!!
Elden [556K]

Answer:

  4th choice (if we guessed the blurry letters properly)

Step-by-step explanation:

The reflection maps ...

  (x, y) ⇒ (x -y)

Then the rotation maps ...

  (x, -y) ⇒ (y, x)

That is, R(-1, 4) becomes R'(4, -1), apparently matching point S, the only point at (4, -1). We can't read the letters, but we know that you only need to know where R ends up in order to select the correct answer.

3 0
3 years ago
Which sets of numbers are closed under subtraction?
Alekssandra [29.7K]
I'm pretty sure it is only b because <span>when you subtract two rational numbers, you always get back a rational number.</span>
3 0
3 years ago
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