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ivolga24 [154]
3 years ago
10

Pleasseeee help I'll give you brainlest answer

Mathematics
1 answer:
Greeley [361]3 years ago
5 0

Answer:

The value of x is 10

Step-by-step explanation:

<em>The measure of the </em><em>exterior angle at one vertex</em><em> of a triangle equals </em><em>the sum of the measures of the two opposite interior angles </em><em>to this vertex.</em>

In ΔNOP

∵ ∠OPQ is an exterior angle of the triangle at vertex P

∵ ∠PNO and ∠NOP are the opposite interior angles of vertex P

→ By using the rule above

∴ m∠OPQ = m∠PNO + m∠NOP

∵ m∠OPQ = (6x - 15)°

∵ m∠PNO = (2x + 18)°

∵ m∠NOP = (2x - 13)°

→ Substitute them in the equation above

∴ 6x - 15 = 2x + 18 + 2x - 13

→ Add the like terms in the right side

∵ 6x - 15 = (2x + 2x) + (18 - 13)

∴ 6x - 15 = 4x + 5

→ Subtract 4x from both sides

∵ 6x - 4x - 15 = 4x - 4x + 5

∴ 2x - 15 = 5

→ Add 15 to both sides

∵ 2x - 15 + 15 = 5 + 15

∴ 2x = 20

→ Divide both sides by 2 to find x

∴ x = 10

∴ The value of x is 10

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PtichkaEL [24]

Answer:

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Step-by-step explanation:

Given that Micheal is three times as old as Jean, but in seven years he will be twice old as she will be, to determine how old are they both at this time, the following calculation must be performed:

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Therefore, Michael is 21 years old while Jean is 7 years old.

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