if we take the number of quarters Barrett have to be x we know Penelope has twice that ie 2x. so in total they have 2x+x = 60, 3x = 60; so x= 60/3 = 20.

Barrett has 20 quarters.

7 0

3 years ago

100 Points!!!

Mars2501 [29]

Let's see

Take 28

(28)²
(30-2)²
30²-2(30)(2)+2²
900-120+4
780+4
784

Take 9,10

9³+10³
(9+10)(9²-9×10+10²)
(19)(81-90+100)
19(181-90)
19(91)
1729

7 0

2 years ago

Read 2 more answers

Although, in general, you cannot know the sampling distribution of the sample mean exactly, by what distribution can you often a

Vitek1552 [10]

Answer:

b: Normal Distribution

Step-by-step explanation:

4 0

3 years ago

What is the slope help pls?

almond37 [142]

Answer:

Step-by-step explanation:

7 0

3 years ago