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4 years ago

Jonas wrote 9+8=17. What number sentence shows the commutative property of addition?

Mathematics

2 answers:

KATRIN_1 [288]4 years ago

5 0

Commutative property can be applied to addition and multiplication.

It states the following:

a + b = b + a = c

ab = ba = c

Now, for the given expression:

9 + 8 = 17

Applying the above mentioned property, we get the following expression:

9 + 8 = 8 + 9 = 17

Hope this helps :)

maxonik [38]4 years ago

5 0

The commutative property states that when the other of operation of an operator is changed that the result of the operation remains the same.

For example, given that 9 + 8 = 17, the commutative property states that 8 + 9 = 17

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The dash triangle is the image of the solid triangle. The center of dilation is (-4, -4).

liraira [26]

Answer:

The scale factor of dilation is -3

Step-by-step explanation:

* Lets revise the meaning of dilation

- A dilation is a transformation that produces an image that is the same

shape as the original, but is a different size

- A dilation stretches or shrinks the original figure by a scale factor and

center of dilation

- If the scale factor between 0 and 1, then the original figure shrinks

- If the scale factor greater than 1, then the original figure stretches

- If the scale factor is negative then the original figure is stretches or

shrinks and rotate 180°

* Lets solve the problem

∵ The vertices of the original triangles are

(-4 , -4) , (-4 , -7) , (-6 , -4)

∵ The vertices of the image triangles are

(-4 , -4) , (-4 , 5) , (2 , -4)

∵ The length of one side of the original triangle is (-7) - (-4) = 3 units

∵ The length of the corresponding side in the image triangle is

(5) - (-4) = 9 units

∵ The image is in the opposite side of the center of dilation

- That means the original triangle rotate 180° around the center

of dilation

∴ The scale factor is negative

∵ The ratio between the corresponding sides are 9/3 = 3

∴ The scale factor of dilation is -3

3 0

3 years ago

Solve each equation of 23=7x

solniwko [45]

23=7x
Divide both sides by 7
23/7=x
That is the only answer to this equation

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4 years ago

Lucy was given $28.87 to buy 3 storybooks and 4 comic

saveliy_v [14]

Hope u understand.

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7 0

4 years ago

Use long division to find the quotient and remainder when 6x^3 - 3x^2 + x + 1

professor190 [17]

Hope this helped you

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3 years ago

Arbitron Media Research Inc. conducted a study of the iPod listening habits of men and women. One facet of the study involved th

trasher [3.6K]

Answer:

The null and alternative hypotheses are:

$H_{0}:\sigma_{men} = \sigma_{women}$

$H_{a}:\sigma_{men} \neq \sigma_{women}$

Under the null hypothesis, the test statistic is:

$F=\frac{\sigma^{2}_{men}}{\sigma^{2}_{women}}$

$=\frac{19^{2}}{9^{2}}$

$=\frac{361}{81}$

$=4.46$

Therefore, the test-statistic is $F=4.46$

Now the F critical value at 0.02 significance level for df1 = 10- 1 =9 and df2 = 16 - 1 =15 is:

$F_{critical} = 3.303$

Since F statistic is greater than the F critical value, we therefore, reject the null hypothesis and conclude that there is sufficient evidence to support the claim that there is a difference in the variation in the listening times for men and women.

7 0

3 years ago