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kenny6666 [7]
2 years ago
10

I will give brainliest

Mathematics
1 answer:
alex41 [277]2 years ago
3 0

Answer:

x = 1.25

y = 1.75

Step-by-step explanation:

Since, the line that is 8 units long is parallel to the line that is ten units long.

Therefore, both the triangles are similar by AA postulate.

Corresponding sides of of the similar triangles are in proportion.

Therefore,

\frac{5}{x + 5}  =  \frac{7}{y + 7}  =  \frac{8}{10}  \\  \\  \implies \frac{5}{x + 5}  =  \frac{8}{10}  \\  \\ 5 \times 10 = 8(x + 5) \\  \\ 50 = 8x + 40 \\  \\ 50 - 40 = 8x \\  \\ 10 = 8x \\  \\  \frac{10}{8}  = x \\  \\ x = 1.25 \\  \\  \\ \frac{7}{y + 7}  =  \frac{8}{10} \\  \\ 7 \times 10 = 8(y + 7) \\  \\ 70 = 8y + 56 \\  \\ 70 - 56 = 8y \\  \\ 14 = 8y \\  \\  \frac{14}{8}  = y \\  \\ y = 1.75

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6 0
2 years ago
5. 3x + 5y + 5z =1<br> x - 2y = 5<br> 2x + 4y = 11
lilavasa [31]

Answer:

see explanation

Step-by-step explanation:

Given the 3 equations

3x + 5y + 5z = 1 → (1)

x - 2y = 5 → (2)

2x + 4y = 11 → (3)

Use (2) and (3) to solve for x and y

Multiply (2) by 2

2x - 4y = 10 → (4)

Add (3) and (4) term by term

4x = 21 ( divide both sides by 4 )

x = \frac{21}{4\\}

Substitute this value of x into (3)

2 × \frac{21}{4\\} + 4y = 11

\frac{21}{2\\} + 4y = 11 ( subtract \frac{21}{2\\} from both sides )

4y = \frac{1}{2} ( divide both sides by 4 )

y = \frac{1}{8\\}

Substitute the values of x and y into (1) and solve for z

3 × \frac{21}{4\\} + 5 × \frac{1}{8\\} + 5z = 1

\frac{63}{4} + \frac{5}{8} + 5z = 1

\frac{131}{8} + 5z = 1 ( subtract \frac{131}{8} from both sides )

5z = - \frac{123}{8} ( divide both sides by 5 )

z = - \frac{123}{40}

Solution is

x = \frac{21}{4\\}, y = \frac{1}{8\\}, z = - \frac{123}{40}

3 0
3 years ago
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17-3=14
14/2
7 games that she bowled
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