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Leto [7]
3 years ago
12

Which sentence illustrates the commutative property of addition?

Mathematics
1 answer:
Inga [223]3 years ago
4 0
The answer is: x+y+z= y+x+z. When using commutative property, the sum cannot be changed. Let's plug in our own numbers.

7+8+9=24 so 8+7+9 also equals 24. commutative property is just switching the order that the numbers appear in but in the end, still equals the same thing 
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What are two subsets of real numbers that form the set of real numbers
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Answer:

Two subsets that form set of real numbers

You can take positive numbers and negative numbers subset

One subset become (- infinity,0]

other subset (0, infinity)

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Jackie bought a 3-pack of tubes of glue. She used 0.27 ounce of the glue from the 3-pack
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Answer:

0.54 ounces in each tube

Step-by-step explanation:

Add the amount she used so we can add it in. 1.35+0.27= 1.62. Then divide it by the number of tube and since it was a 3 pack you divide it by 3. 1.62/3=0.54 so there is 0.54 ounces in each tube.

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12 is 30% of what number?
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3 years ago
Complete parts ​(a) through ​(c) below.
Yuki888 [10]

Answer:

a)t_{crit}= 1.34

b) t_{crit}=-2.539

c) t_{crit}=\pm 2.228

Step-by-step explanation:

Part a

The significance level given is \alpha=0.1 and the degrees of freedom are given by:

df = n-1= 15

Since we are conducting a right tailed test we need to find a critical value on the t distirbution who accumulates 0.1 of the area in the right and we got:

t_{crit}= 1.34

Part b

The significance level given is \alpha=0.01 and the degrees of freedom are given by:

df = n-1= 20-1=19

Since we are conducting a left tailed test we need to find a critical value on the t distirbution who accumulates 0.01 of the area in the left and we got:

t_{crit}=-2.539

Part c

The significance level given is \alpha=0.05 and \alpha/2 =0.025 and the degrees of freedom are given by:

df = n-1= 11-1=10

Since we are conducting a two tailed test we need to find a critical value on the t distirbution who accumulates 0.025 of the area on each tail and we got:

t_{crit}=\pm 2.228

4 0
3 years ago
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