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motikmotik
3 years ago
13

Answer part A and part B and explain how you got your answers please ❤️

Mathematics
1 answer:
Vanyuwa [196]3 years ago
4 0

Part a: Option c: 3x+90+x-14=180

Part b: The value of x is 26

Explanation:

Part a:

Option a: 3x+x-14=180

Since, adding all the angles in the straight line results in 180°, and only two of the three angles were added in the equation to find the value of x.

Thus, the equation 3x+x-14=180 cannot be used to determine the value of x.

Hence, Option a is not the correct answer.

Option b: 3x+90+x-14=90

Adding all the angles in the straight line results in 180°.

Thus, adding all the angles does not equals to 90°

Hence, the equation 3x+90+x-14=90 cannot be used to determine the value of x.

Hence, option b is not the correct answer.

Option c: 3x+90+x-14=180

Since, the straight line is 180° and thus adding the angles in this straight line will result in 180°

Thus, the angles in this straight line are 3x, 90° and x-14.

Hence, adding these angles will result in 180°

Thus, the equation becomes

3x+90+x-14=180

Hence, the equation used to determine the value of x is 3x+90+x-14=180

Thus, Option c is the correct answer.

Option d: 4x+90=360

Adding all the angles in the straight line results in 180°.

Since, not all the three angles were added in this equation and the equation equals to 180°

Hence,  the equation 4x+90=360 cannot be used to determine the value of x.

Thus, Option d is not the correct answer.

Part b:

To determine the value of x, we shall add all the angles of the equation 3x+90+x-14=180

Thus, we get,

4x+76=180

Subtracting both sides by 76,

4x=104

Dividing both sides by 4, we get,

x=26

Thus, the value of x is 26.

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