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2 years ago

Triangle ABC is similar to triangle DEF.

Mathematics

1 answer:

Sav [38]2 years ago

7 0

Answer: x=7.7, y=40

3/x = 15/38.5

38.5*3=115.5

115.5/15= 7.7

x=7.7

3/8 = 15/y

15*8=120

120/3= 40

y=40

orrrr you can just easily find the scale factor which is 5, multiply 8 by 5 and get 40. And 38.5/5 which is 7.7

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Galina-37 [17]

Answer:

$\$ (\frac{j+15}{3} )$

Step-by-step explanation:

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Since Angela also paid a $5 Tip

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We can simplify this further by taking the LCM.

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3 years ago

Solve the following proportion for x 3/8 =x/13

zhenek [66]

The value of x in the proportion is x = 39/8

<h3>How to solve the proportion?</h3>

The proportion is given as:

3/8 =x/13

Cross multiply

8 * x = 3 * 13

Evaluate

8x = 39

Divide by 8

x = 39/8

Hence, the value of x in the proportion is x = 39/8

Read more about proportions at:brainly.com/question/1781657

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7 0

1 year ago

X^2-4x+c find the value of c

Sonbull [250]

Answer:

$c = 4$

Step-by-step explanation:

Given

$x^2 - 4x + c$

Required

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The question is incomplete. However, I'll assume the expression is a perfect square.

To find c, we make use of the following formula

$c = (\frac{b}{2})^2$

Where

$ax^2 + bx + c$

By comparison with $x^2 - 4x + c$

$a =1$

$b = -4$

So, $c = (\frac{b}{2})^2$ becomes

$c = (\frac{-4}{2})^2$

$c = (-2)^2$

$c = 4$

<em>The value of c that makes the expression, </em> $x^2 - 4x + c$ <em> a perfect square is 4 and the expression is: </em> $x^2 - 4x + 4$ <em></em>

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3 years ago

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Mekhanik [1.2K]

Answer: x/y=1

Step-by-step explanation:

a(x-y)=b(y-x)

(a+b)x=(a+b)y

x/y=1 ans

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3 years ago

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vivado [14]

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