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noname [10]
3 years ago
6

Which graph represents 49x2 + 4y2 + 196x – 40y + 100 = 0?

Mathematics
2 answers:
GREYUIT [131]3 years ago
8 0

Answer:

D

Step-by-step explanation:

Feliz [49]3 years ago
7 0

Answer:

its D

Step-by-step explanation:

desmos

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Carl drew a rectangle with a width of 8 in. And a length of 32 in. Which rectangles are not similar to Carl’s rectangle? Select
dolphi86 [110]

Answer:

1) A rectangle with width of 10 cm and length of 44 cm.

4) A rectangle with width of 9 mm and length of 45 cm.

Step-by-step explanation:

Given:

Length of the rectangle = 32 in.

Width of the rectangle = 8 in.

Now we will find the ratio of length by width.

\frac{length}{width}= \frac{32}{8} = \frac{4}{1} \ \ \ \ equation \ 1

Now we need to find from the given Option which rectangles are not similar to Carl's Rectangle.

So we will check for each.

1) A rectangle with width of 10 cm and length of 44 cm.

Now we will find the ratio of length by width.

\frac{length}{width}= \frac{44}{10} = \frac{11}{5} \ \ \ \ equation \ 2

Now we know that;

"When ratio of the dimension of corresponding rectangles are equal then the 2 rectangles are said to be similar."

Now Comparing equation 1 and equation 2 we get;

equation 1 \neq equation 2

Hence This rectangle is not similar to Carl's rectangle.

2) A rectangle with width of 2.5 inch and length of 10 inch.

Now we will find the ratio of length by width.

\frac{length}{width}= \frac{10}{2.5} = \frac{4}{1} \ \ \ \ equation \ 2

Now we know that;

"When ratio of the dimension of 2 corresponding rectangles are equal then the 2 rectangles are said to be similar."

Now Comparing equation 1 and equation 2 we get;

equation 1 = equation 2

Hence This rectangle is similar to Carl's rectangle.

3) A rectangle with width of 23 cm and length of 92 cm.

Now we will find the ratio of length by width.

\frac{length}{width}= \frac{92}{23} = \frac{4}{1} \ \ \ \ equation \ 2

Now we know that;

"When ratio of the dimension of 2 corresponding rectangles are equal then the 2 rectangles are said to be similar."

Now Comparing equation 1 and equation 2 we get;

equation 1 = equation 2

Hence This rectangle is similar to Carl's rectangle.

4) A rectangle with width of 9 mm and length of 45 cm.

Now we will find the ratio of length by width.

\frac{length}{width}= \frac{45}{9} = \frac{5}{1} \ \ \ \ equation \ 2

Now we know that;

"When ratio of the dimension of corresponding rectangles are equal then the 2 rectangles are said to be similar."

Now Comparing equation 1 and equation 2 we get;

equation 1 \neq equation 2

Hence This rectangle is not similar to Carl's rectangle.

8 0
3 years ago
If a + b = 5 and a - b = 9, what is a^2+b^2?
Nitella [24]

Answer:

=53

Step-by-step explanation:

a=5-b     &.    a=9+b

combine

5-b=9+b

-4=2b

b= -2

thus, a=7

(-2)^2 + (7)^2

4+49

=53

5 0
3 years ago
Read 2 more answers
Solve the system using substitution.<br> 6x+8y=30 y=1/2x
sergij07 [2.7K]

Answer:

  • (3, 1.5)

Step-by-step explanation:

<u>Given the system: </u>

  • 6x + 8y = 30
  • y=1/2x

<u>Substitute y and solve for x:</u>

  • 6x + 8y = 30
  • 6x + 8(1/2x) = 30
  • 6x + 4x = 30
  • 10x = 30
  • x = 3

<u>Find y:</u>

  • y = 1/2x
  • y = 1/2(3)
  • y = 1.5

Solution is (3, 1.5)

8 0
3 years ago
Please help me out and find BOTH values of x and y​
Montano1993 [528]

Answer:

y=37 x= 5or 4

Step-by-step explanation:

3 0
3 years ago
2 – 2n = 3n -+- 17<br>pls help​
gayaneshka [121]

Answer:

n=-3

Step-by-step explanation:

3 0
4 years ago
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