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3 years ago

Classify each scale factor as a contraction or an expansion. Drag and drop the choices into the boxes to complete the table.

Mathematics

2 answers:

Nataly [62]3 years ago

8 0

Answer:

The answers are

Contraction: 1/3, 0.8

Expansion: 4, -3, 3/2

Explanation:

Expansion, everything that is above 1 is considered expansion even if it is a negetive.

Contraction, anything that is below 1 is considered contraction.

statuscvo [17]3 years ago

7 0

<span>The correct answers are: 3/2, expansion; 1/4, contraction; 4, expansion; 0.8, contraction; -3, expansion.

Explanation<span>:
If a scale factor is greater than 1, it is an expansion. This means that both 3/2 and 4 are expansions.

If a scale factor is less than 1, it is a contraction. This means that 1/4 and 0.8 are contractions.

If a scale factor is negative, we treat it as if we would a positive, but it is on the opposite side of the point of enlargement. This means that -3 would still be an expansion.</span></span>

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4 years ago

Help pls also show work if needed!

coldgirl [10]

250 words in 5 minutes

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3 years ago

Read 2 more answers

What is the value of x, if twice x plus 3 cubed equals 40?

tatuchka [14]

I will give two solutions, one where everything is cubed and one where just the 3 is cubed, because I don't know what you meant.

Just the 3 is cubed solution(Which I think is correct because it has a nicer answer):

Answer:

$13/2$

Step-by-step explanation:

We have that $2x+3^3=40$ .

We can subtract $3^3=27$ from both sides of the equation to get $2x=13$ .

We can then divide by $2$ to get $x=13/2$ .

So, $\boxed{x=13/2}$ and we're done!

Everything is cubed solution:

Answer:

$\sqrt[3]{5}-3/2$

Step-by-step explanation:

We have that $(2x+3)^3=40$ .

We can take the cube root of both sides to get $2x+3=\sqrt[3]{40}$ .

Note that $40=2^3*5$ , so $\sqrt[3]{40}=\sqrt[3]{2^3*5}=2\sqrt[3]{5}$ .

So, we want to solve $2x+3=2\sqrt[3]{5}$ .

We can subtract $3$ from both sides to get $2x=2\sqrt[3]{5}-3$ .

We can then divide both sides by $2$ to get $x=\sqrt[3]{5}-3/2$ .

So, $\boxed{x=\sqrt[3]{5}-3/2}$ and we're done!

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3 years ago

5,687.3 mi to the nearest mile

beks73 [17]

5687.3 to the nearest mile is 5,687 miles

Because the number directly to the right of ur 7 is a 3....and since it is below 5, ur whole number stays the same....if that number would have been a 5 or above, u would have rounded ur whole number up 1 making it 5688.

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