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natima [27]
4 years ago
10

===============================================================

Mathematics
1 answer:
MAXImum [283]4 years ago
6 0

Answer: A. Figure ABCD is similar to figure A'B'C'D'.

Step-by-step explanation:

Given : Figure ABCD is reflected about the x-axis to obtain figure A'B'C'D'.

Since a reflection is a rigid transformation which produces congruent images.

⇒ Figure ABCD must be congruent to figure A'B'C'D'.

⇒ Figure ABCD has same size as figure A'B'C'D'.

⇒ Figure ABCD must be similar to figure A'B'C'D'.  [ ∵ If two figures are congruent then they are also similar.]

Reflection preserves side length and measure of angles .

⇒ Corresponding angles and side lengths of figure ABCD must be congruent to figure A'B'C'D'.

⇒ The measure of angle D is equal to the measure of angle D'.

Hence, the statement best describes the relationship between the two figures is :-

A. Figure ABCD is similar to figure A'B'C'D'.

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a rectangle has a width that is 7 centimeters less than its length, and it’s area is 330 square centimeters. what are the dimens
WINSTONCH [101]

Answer:

The dimensions of the rectangle are 22cm of length and 15cm of width

Step-by-step explanation:

To solve this we first have to know the formula to calculate the area of ​​a rectangle

a = area = 330 cm²

L = length  =

w = width = L - 7cm

a = l * w

we replace with the known values

330 cm² = L * (l - 7cm)

330 cm² = L² - 7Lcm

0 = L² - 7Lcm - 330 cm²

when we have an equation like this we can use bhaskara

a = 1

b = -7Lcm

c = -330cm²

ax² + bx + c = 0

x = -b(±)√(b² - 4ac)/2a

we replace with the known values

L = -(-7cm)(±)√(7² - 4(1)(-330cm²)) / 2(1)

L = 7cm(±)√(49 + 1320cm²)) / 2

L = 7cm(±)√(1369cm²)) / 2

L1 = (7cm + 37cm) / 2

L1 = 44cm / 2 = 22cm

L2 = (7cm - 37cm) / 2

L2 = -30cm / 2 = -15cm

The positive represents the unknown with which we work (L) and the negative with which we do not work (W)

The dimensions of the rectangle are 22cm of length and 15cm of width

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What are the coordinates of vertex Y?
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I found it to be 0,1 from counting.

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$6,000 for 6 years at 8½% compounded daily will grow to ?
iren [92.7K]

When an amount P  is invested for t years during which it earns an interest of r dollars compounded  m times per year, the formula to calculate the amount that investment grows to after t years is,

A=P(1+\tfrac{r}{m})^{mt}.

Assuming that a years has 365 days ,the values for each of these variables is given as follows, m=365 ,t=6r=8.5\%=0.085 . The value of the investment after 6 years is then calculated as shown below,

A=P(1+\tfrac{r}{m})^{mt}\\A=6000(1+\tfrac{0.085}{365})^{(365\times 6)}\\A=9991.15

The investment grows to reach  $9991.15 in 6 years.



8 0
3 years ago
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