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svet-max [94.6K]

3 years ago

11

Determine whether the two expressions are equivalent. If so, tell what property

1 answer:

Aleksandr-060686 [28]3 years ago

8 0

Answer:

They are equivalent by Associative Property

Step-by-step explanation:

(3•6)•9 is 18•9 which is 162

3•(6•9) is 3•54 which is also 162

So the difference between the two expressions is that they are grouped differently. In the first expression the 3•6 had to be multiplied first. In the other expression the 6•9 had to be multiplied first. But really both were 3•6•9 and it's all multiplication and can happen in any order. But the order 3, 6, 9 did not change. That is Associative property that says you can multiply by grouping factors differently and still get the same answer.

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Find the sum of ( + − ) + ( − ).

andre [41]

Answer:

it would be a negative

Step-by-step explanation:

(+-) cancels itself out to be 0 and (-) is negative so adding a negative to 0 will give you a negative. Hope this helps (:

3 0

3 years ago

Read 2 more answers

Karen and Kristen were in a competition to see who could walk the

Gelneren [198K]

Answer:

They each walked the same amount if you plug 7 into each of their expressions

Step-by-step explanation:

Karen walked 3(7) - 4 or 17 miles

Kristen walked 2(7) + 3 or 17 miles

5 0

3 years ago

Assuming that the rate of change continues, how far beneath the surface is the diver after 60 seconds

AlekseyPX

The diversity would be 120 meters

4 0

3 years ago

Find the scale factor where the pre-image is the small triangle and the image is the large triangle.

Oduvanchick [21]

Answer:

The scale factor is $\frac{9}{7}$

Step-by-step explanation:

we know that

If two figures are similar, then the ratio of its corresponding sides is proportional and this ratio is called the scale factor

so

$\frac{18}{14}=\frac{27}{21}=\frac{9}{7}$

therefore

The scale factor is 9/7

Find the value of x

The value of x is equal to

$\frac{x}{28}=\frac{9}{7}$

$x=28(\frac{9}{7})=36\ units$

7 0

3 years ago

Susie is solving the quadratic

topjm [15]

Answer:

Option (D)

Step-by-step explanation:

Standard equation of a quadratic function is,

ax² + bx + c

Comparing this function with the given quadratic function,

f(x) = 2x² - 4x - 3

a = 2, b = -4 and c = -3

By using quadratic formula to get the value of x,

x = $\frac{-b\pm \sqrt{b^2-4ac} }{2a}$

= $\frac{-(-4)\pm \sqrt{(-4)^2-4(2)(-3)} }{2(2)}$

= $\frac{4\pm\sqrt{16+24}}{4}$

= $\frac{-4\pm \sqrt{40}}{4}$

= $\frac{-2\pm \sqrt{10}}{2}$

Therefore, Susie made a mistake in step IV.

Option (D) is the answer.

5 0

3 years ago