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sveticcg [70]
2 years ago
10

Andre said, I found two figures that are congruent, so they can’t be similar.” Diego said, No, they are similar! The scale facto

r is 1.”who is correct use the definition of similarity to explain your answer
Mathematics
1 answer:
Scilla [17]2 years ago
5 0

Answer:


Step-by-step explanation:

Diego is correct they have to be similar

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How to solve and respond.
son4ous [18]

Step-by-step explanation:

the error:

it is stated that

\frac{5x}{x+7} +\frac{7}{x} = \frac{5x}{x+7} +\frac{7(7)}{x+7}

subtract (5x)/(x+7) from both sides

\frac{7}{x}  = \frac{7(7)}{x+7}

multiply both sides by x + 7

7(x+7) = 49x

7x + 49 = 49x

subtract 7x from both sides to isolate x and its coefficient

49 = 42x

thus, this is only true when 49 = 42x. in order for these two equations to be equal, they must <em>always </em>be true, so this is wrong

the solution:

we want to express 7/x as (something) / (x+7). to do this, we can multiply 7/x  by 1.

anything divided by itself = 1. thus, if we multiply both the numerator and the denominator by something that turns x into (x+7), we can do what we want to do.

(x+7)/x * x turns x into (x+7), so we multiply both the numerator and denominator by (x+7)/x to get

\frac{7}{x} = \frac{7(x+7)/x}{x+7}

substitute this for 7/x in our original problem

\frac{5x}{x+7} +\frac{7(x+7)/x}{x+7} =  \frac{5x}{x+7} +\frac{(7x+49)/x}{x+7} = \frac{5x}{x+7} +\frac{7+49/x}{x+7} = \frac{5x+7+49/x}{x+7}

3 0
2 years ago
There is 2/5 cup of cream in a nelly cream pie.How much cream would you need if you were making 3/4 of a pie
mixer [17]
(2/5) / 1 = x / (3/4).....2/5 cups to 1 pie = x cups to 3/4 pie
cross multiply
(1)(x) = (2/5)(3/4)
x = 6/20 which reduces to 3/10 cups <==
6 0
3 years ago
The Wright brothers flyer had a 48 inch wingspan Carla bought a model of of the plane with a scale factor of 1 to 40 what is the
notsponge [240]
\bf \cfrac{model}{actual}\qquad 1:40\qquad \cfrac{1}{40}=\cfrac{x}{48}\implies \cfrac{48\cdot 1}{40}=x
5 0
3 years ago
3x -5x + 8x = 4x + 18
Alex777 [14]

Answer:

x = 9

Step-by-step explanation:

6x = 4x + 18

6x - 4x = 18

2x = 18

x = 9

5 0
3 years ago
Read 2 more answers
Need help ASAP please not links please
Llana [10]

Answer:

a) 22:24 simplified the answer is 11:12

b) 21:81 simplified the answer is 7:27

Step-by-step explanation:

not sure how you were taught but those could also be

a)  \frac{22}{24} or simplified the answer is \frac{11}{12}

b) \frac{21}{81} or simplified the answer is  \frac{7}{27}

7 0
2 years ago
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