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4 years ago

Which equation shows the commutative property of addition?

Mathematics

2 answers:

docker41 [41]4 years ago

6 0

Answer:

A-4+3=3+4

Step-by-step explanation:

The commutative property of addition, also known as the order property of addition, means that a given group of numbers can be added in any order and their sum will always be the same.

marishachu [46]4 years ago

3 0

Answer:

Step-by-step explanation:

commutative is where one equals out to another and then when using addition you have to use the plus sign

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Which of the following are solutions to the equation below?

evablogger [386]

Answer:

x = 5 ± $\sqrt{17}$

Step-by-step explanation:

Given

x² - 10x + 25 = 17 ← left side is a perfect square, thus

(x - 5)² = 17 ( take the square root of both sides )

x - 5 = ± $\sqrt{17}$ ( add 5 to both sides )

x = 5 ± $\sqrt{17}$

Thus

x = 5 - $\sqrt{17}$

x = 5 + $\sqrt{17}$

6 0

3 years ago

.If x2 + kx+ 6 = (x + 2) (x + 3) for all x, then the value of k is<br><br>

Verdich [7]

Answer:

k = 5

Step-by-step explanation:

$(x + 2)(x + 3) = {x}^{2} + 5x + 6$

Now comparing left hand side & right hand side ,

${x}^{2} + kx + 6 = {x}^{2} + 5x + 6$

Cancelling x^2 & 6 from both left hand side & right hand side ,

kx = 5x

=> k = 5

3 0

3 years ago

7(3x-2)+4=95<br>if you are really smart at math please help right away

skelet666 [1.2K]

Answer:

Step-by-step explanation:

(21x-14)+4=95 - Distributed in the 7 into the parenthesis

21x-10=95 - combine like terms

21x=105 - add 10 to both sides

x=5 - divide both sides by 21

8 0

4 years ago

Read 2 more answers

1/5 of 45 is what number?

xxMikexx [17]

Answer:

Step-by-step explanation:

1/5x45= 9

4 0

3 years ago

A sample of 500 nursing applications included 60 from menThe 95% confidence interval of the true proportion of men who applied t

Dafna1 [17]

Answer:

The correct solution is "(0.092, 0.148)".

Step-by-step explanation:

Given:

Sample size,

n = 500

True proportion,

$\hat {p} = \frac{60}{500}$

$=0.12$

The standard error will be:

$SE=\sqrt{\frac{\hat p(1-\hat p)}{n} }$

$=\sqrt{\frac{0.12(1-0.12)}{500} }$

$=\frac{0.12(0.88)}{500}$

The confidence interval is "1.96".

hence,

The required confidence interval will be:

= $(\hat p - 1.96 SE, \hat p + 1.96 SE)$

By substituting the values, we get

= $(0.12-1.96\sqrt{\frac{0.12(0.88)}{500} }, 0.12+1.96\sqrt{\frac{0.12(0.88)}{500} } )$

= $(0.092, 0.148)$

8 0

4 years ago