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SVETLANKA909090 [29]

3 years ago

12

The figures above are similar. The scale factor of quadrilateral EFGH to quadrilateral ABCD is 0.4. Given that BC = 12, find GF.

2 answers:

34kurt3 years ago

5 0

The answer is 0.4The figures above are similar. The scale factor of quadrilateral EFGH to quadrilateral ABCD is 0.4. Given that BC = 12, find GF.

sesenic [268]3 years ago

3 0

The CORRECT answer for this is: (0.4) <-----

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BC = 6, EF = 12 Based on the given information, choose the similarity statement that you would use to say ABC~DEF. If you could

vovangra [49]

Answer:

The answer is "NOT"

Step-by-step explanation:

To demonstrate a similar statement we want to have yet another side or some other angle, however, the third section is not proportional.
Its sides were equivalent in proportions (yeah sure they are) + corner by the by is not given.
There is no triangle angle provided so, that we can not enforce the SAS argument.
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3 years ago

The length of a rectangle is 4 meters less than twice its width. The are of a rectangle is 70m^2. Find the dimensions of the rec

igomit [66]

Answer:

The length is 7 m

The width is 10 m

Step-by-step explanation:

length = x

width = 2x - 4

length * width = area

It is given that the area is 70 $m^{2}$

From there

x * (2x - 4) = 70

$2x^{2}$ - 4x = 70

$2x^{2}$ - 4x - 70 = 0

$x^{2}$ - 2x - 35 = 0

Now we have a quadratic equation, which is a $x^{2}$ + bx + c = 0, where a $\neq$ 0

In this equation a = 1, b = -2 and c = -35

Discriminant (D) formula is b² - 4ac

D = $-2^{2}$ - 4 * 1 * (-35) = 144 > 0

This discriminant is more than 0, so there are two possible x

Their formulas are $\frac{- b - \sqrt{D} }{2a}$ and $\frac{- b + \sqrt{D} }{2a}$

$x_{1}$ = $\frac{- (-2) - \sqrt{144} }{2}$ = -5 < 0 (the length of the rectangle has to be more than 0, so we don't use this x)

$x_{2}$ = $\frac{- (-2) + \sqrt{144} }{2}$ = 7 > 0 (this one is right)

Calculating the dimensions

length = x = 7 (m)

width = 2x - 4 = 2 * 7 - 4 = 10 (m)

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3 years ago

1+4=5, 2+5=12, 3+6=21, 8+11=?

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96 is the correct answer to your question i

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lapo4ka [179]

1/2 ÷ -3/7 = -7/6 The answer is -7/6

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Answer:

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Step-by-step explanation:

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