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3 years ago

7

Is 42° correct?? Please help

1 answer:

Romashka [77]3 years ago

7 0

X=40 degrees because it s on the circle. arc AD+arc DC=180 arc DC is 100 so AD is 80. That means x must be 40.

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Help with 13 and 14 please

nika2105 [10]

Answer:

I think the answer to the first question is "B"

and the second one is "D"

Step-by-step explanation:

7 0

3 years ago

A rectangle has a perimeter of 14 inches. A similar rectangle has a perimeter of 10 inches. If the length of the larger rectangl

Jet001 [13]

Answer:

2.9 in.

Step-by-step explanation:

Let x in be the width of the larger rectangle. If the length of the larger rectangle is 4 inches and the perimeter of the larger rectangle is 14 in, then

$x+4+x+4=14,\\ \\2x=14-8,\\ \\2x=6,\\ \\x=3\ in.$

If two rectangles are similar, then their lengths and widths are proportional with the scale factor k. Thus, the length of the smaller rectangle is $4k$ in and the width of the smaller rectangle is $3k$ in. If the perimeter of the smaller rectangle is 10 in, then

$4k+3k+4k+3k=10,\\ \\14k=10,\\ \\k=\dfrac{10}{14}=\dfrac{5}{7},\\ \\4k=\dfrac{20}{7}\approx 2.9\ in,\\ \\3k=\dfrac{15}{7}\approx 2.1\ in.$

7 0

3 years ago

Kim and Leon exercise a total of 20 hours each week. Leon exercises 2 hours less than 3 times the number of hours Kim exersices.

ddd [48]

Answer:

3

Step-by-step explanation:

4 0

3 years ago

Triangle A'B'C' is formed by a reflection over x = 1 and dilation by a scale factor of 2 from the origin. Which equation shows t

ollegr [7]

Answer:

$\frac{AB}{A"B"}=\frac{1}{2}$

Step-by-step explanation:

Given

$k = 2$ --- scale factor

Required

Relationship between ABC and A"B"C"

$k = 2$ implies that the sides of A"B"C" are bigger than ABC

i.e.

$A"B" = 2AB$

$A"C" = 2AC$

$B"C" = 2BC$

In $A"B" = 2AB$

Divide both sides by A"B"

$1 = \frac{2AB}{A"B"}$

Divide both sides by 2

$\frac{1}{2} = \frac{AB}{A"B"}$

Rewrite as:

$\frac{AB}{A"B"}=\frac{1}{2}$

(a) is correct

8 0

2 years ago

What type of transformation has occurred in the figure below?

My name is Ann [436]

Answer:

B. Reflection

Explanation:

We can see that the figure has been reflected on x = 4.

Both B and D has been flipped but A and C is same.

The image is congruent to the original shape.

If translation was done B and D would not have flipped.

If rotation was done, all the coordinates would shift.

5 0

1 year ago

Read 2 more answers