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Marianna [84]
2 years ago
5

9. Preschoolers were asked to assemble a plastic toy several times in a row and were timed as

Mathematics
1 answer:
GuDViN [60]2 years ago
8 0

Answer:

The researchers considered the before and after design of the study. They concluded that since the P-value was greater than the significance level, they had to fail to reject the null hypothesis.

Step-by-step explanation

test says is correct

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Help me please, I don't really get this at all.
Varvara68 [4.7K]

Answer:

b.

Step-by-step explanation:

Seats to minutes = 2 to 11:

2/11 = s/m.

When  s = 16:

2/11 = 16/m

m = 11*16 / 2

= 176/2

= 88  minutes.

When s =  19:

2/11 = 19 / m

m = 11*19 / 2

m  = 209/2

= 104.5 minutes.

6 0
4 years ago
Read 2 more answers
What is ​ BC ​?
gtnhenbr [62]

BC = 18

AB = AC, hence

8x - 4 = 5x + 11 ( subtract 5x from both sides )

3x - 4 = 11 ( add 4 to both sides )

3x = 15 ( divide both sides by 3 )

x = 5

BC = 4x - 2 = (4 × 5 ) - 2 = 20 - 2 = 18


3 0
3 years ago
Need help with Geometry homework.
solmaris [256]

Answer:

SU = 22

Step-by-step explanation:

SR = RU

4x - 1 = x + 8

3x - 1 = 8

3x = 9

x = 3

SR =  4(3) - 1 = 11

RU =  3 + 8 = 11

SU = 11 + 11 = 22

7 0
3 years ago
Can you help me with these please 30 points
garik1379 [7]

Answer: 1. densities

2. i don’t have the passage but i assume it to be A or D

3. it will sink so A

Step-by-step explanation:

the density must be lower than 1 g/cm3 for it to float

3 0
4 years ago
Read 2 more answers
Brainliest to correct !!!
dalvyx [7]

I’m not sure if I am correct ,

Informally, each hour of overtime is like 2.5 hours of regular time, so 8 hours of overtime is like 8*2.5 = 20 hours of regular time.

So her $1470 earnings are for 40+20 = 60 hours of work.

Her regular hourly wage is 1470$/60=24.5 dollars

40(x)+8(2.5x)=1470
40x+20x=1470
60x=1470
X=1470/60
X=24.5 dollars

Answer =24.5$
4 0
3 years ago
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