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3 years ago

The following number sentence is _____________. (9 ÷ 5) ÷ 2 = 9 ÷ (5 ÷ 2)

Mathematics

2 answers:

Bumek [7]3 years ago

6 0

Commutative property

Orlov [11]3 years ago

3 0

Answer:

Associative Property

Hope this helps

-Amelia The Unknown

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While shopping for clothes, Daniel spent $42 less than 3 times what Curtis spent. Daniel spent $21. Write and solve an equati

ratelena [41]

Answer:

$21

Step-by-step explanation:

21+42=63

x=63:3

x=$21

5 0

3 years ago

Combine like terms for (3x²+2x²-5x+7)+(4x²+2x-3)

horsena [70]

Answer:

9x^2-3x+4

Step-by-step explanation:

(3x^2+2x^2-5x+7)+(4x^2+2x-3)

5x^2-5x+7+4x^2+2x-3

5x^2+4x^2-5x+2x+7-3

9x^2-3x+7-3

9x^2-3x+4

5 0

2 years ago

Read 2 more answers

In analyzing the city and highway fuel efficiencies of many cars and trucks, the mean difference in fuel efficiencies for the 60

Olegator [25]

Answer:

$7.38-1.96\frac{2.51}{\sqrt{601}}=7.18$

$7.38+1.96\frac{2.51}{\sqrt{601}}=7.58$

For this case the confidence interval is given by :

$7.18 \leq \mu \leq 7.58$

Step-by-step explanation:

Data provided

$\bar X=7.38$ represent the sample mean for the fuel efficiencies

$\mu$ population mean

s=2.51 represent the sample standard deviation

n=601 represent the sample size

Confidence interval

The formula for the confidence interval of the true mean is given by:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom for this case is given by:

$df=n-1=601-1=600$

The Confidence level for this case is 0.95 or 95%, and the significance level $\alpha=0.05$ and $\alpha/2 =0.025$ and the critical value is given by $t_{\alpha/2}=1.96$

Replcing into the formula for the confidence interval is given by:

$7.38-1.96\frac{2.51}{\sqrt{601}}=7.18$

$7.38+1.96\frac{2.51}{\sqrt{601}}=7.58$

For this case the confidence interval is given by :

$7.18 \leq \mu \leq 7.58$

8 0

3 years ago

Who is in 6th grade or 7th? cause I swear hrw.com is horrible

LiRa [457]

Answer:

Not me

Step-by-step explanation:

im in high school lol

8 0

2 years ago

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Lonna had 30 minutes to do a three-problem quiz. She spent 11 minutes on question A and 4

STatiana [176]

Answer:

She had 15 minutes left.

Step-by-step explanation:

30 - 11 = 19

19 - 4 = 15

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2 years ago

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