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Vladimir79 [104]
2 years ago
9

Triangle XYZ is translated by the rule (x + 1, y â 1) and then dilated by a scale factor of 4 centered at the origin. Which stat

ement describes the properties of triangles XYZ and X''Y''Z'' after the transformations? Y and â Y'' are congruent after the translation, but not after the dilation. â Y and â Y'' are congruent after the dilation, but not after the translation. and are proportional after the translation, but not after the dilation. and are proportional after the dilation and congruent after the translation.
Mathematics
1 answer:
marysya [2.9K]2 years ago
5 0

Answer:  Y and Y'' are congruent after the translation, but not after the dilation.

Step-by-step explanation:

We know that we generally prefer rigid transformations if want to create congruent images.

There are three basic kinds of rigid transformations:  

1) rotation 2) reflection 3) translation

So, they all create congruent images.

But a dilation does not create congruent images because it creates an image of similar same shape as the original but not the same size.

Given : Triangle XYZ is translated and then dilated by a scale factor of 4 centered at the origin.

Then, the correct option is "Y and Y'' are congruent after the translation, but not after the dilation."

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For this case we have that by definition, the area of a triangle is given by:

A = \frac {b * h} {2}

Where:

b: It is the base of the triangle

h: It is the height of the triangle

According to the statement data we have:

b = 6 + 2h

Substituting we have:

88 = \frac {(6 + 2h) * h} {2}\\176 = 6h + 2h ^ 2\\2h ^ 2 + 6h-176 = 0

We divide between 2 on both sides:

h ^ 2 + 3h-88 = 0

We factor by looking for two numbers that, when multiplied, are obtained -88 and when added together, +3 is obtained.

These numbers are +11 and -8.

(h + 11) (h-8) = 0

We have two roots:

h = -11\\h = 8

We choose the positive value.

Thus, the base of the triangle is:b = 6 + 2 (8) = 22

Answer:

The base of the triangle is 22 units.

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2 years ago
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The shorter sides of an acute triangle are x cm and 2x cm. The longest side of the triangle is 15 cm. What is the smallest possi
Ierofanga [76]
For an acute angled triangle 

h^2 < x^2 + y^2      where h = longest side and x and y are the other 2 sides.

so here we have

15^2 <  x^2 + (2x)^2

15^2 <  5x^2

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Which equation is the inverse of y = 2x2 – 8?​
natita [175]

The inverse of the function is y=\pm \sqrt{\frac{x+8}{2}}

Explanation:

To find the inverse of the equation y=2x^{2} -8, we need to interchange the variables x and y for the variables y and x.

Thus, the equation becomes

x=2y^{2} -8

Now, we shall find the value of y.

Now, adding 8 to both sides of the equation, we have,

x+8=2y^{2}

Interchanging the sides,

2y^{2} =x+8

Dividing by 2 on both sides,

y^{2} =\frac{x+8}{2}

Taking square root on both sides,

y=\pm \sqrt{\frac{x+8}{2}}

Thus, the inverse of the function is y=\pm \sqrt{\frac{x+8}{2}}

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Rasheed wants to buy two new video games that cost $28.50 each. He earns money for them by mowing lawns in his neighborhood, and
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Answer:

$15.25

Step-by-step explanation:

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Alex bought a new easy chair for $399. She bought it on the '12 months is the same as cash' plan. The contract stated that if no
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Answer:

$ 454.86 : $33.25

Step-by-step explanation:

1.

Alex bought the new easy chair for $ 399 .

If she pays the amount in 13th month. So,  she has to pay the interest of 1 month too , which is, = $ \frac {399 \times 14}{100}

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So, total amount she has to pay for the chair,

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                       = $ (399 + 55.86)

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2.    

If she wants to pay the amount within the 12 months, so that she doesn't have to pay the interest,  her budget for that for each month will be ,

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