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3 years ago

I am trying to remember how to do Write a two-column proof,

Mathematics

1 answer:

Klio2033 [76]3 years ago

4 0

9514 1404 393

Explanation:

Make use of the properties of equality.

a = 2b +6 . . . . . given

a = 9b -8 . . . . . given

2b +6 = 9b -8 . . . . . . . substitution property of equality

6 = 7b -8 . . . . . . . . . . . subtraction property of equality

14 = 7b . . . . . . . . . . . . . addition property of equality

2 = b . . . . . . . . . . . . . . . division property of equality

b = 2 . . . . . . . . . . . . . . symmetric property of equality

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2 years ago

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2 years ago

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Step-by-step explanation:

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2 years ago

Triangle P R Q is shown. Angle R P Q is 39 degrees. The length of P R is 6, the length of R Q is p, and the length of P Q is 8.

KATRIN_1 [288]

According to law of cosines the length of RQ can be written as $p^{2} =6^{2} +8^{2} -2*6*8cos(39)$ .

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A length of the triangle can be written as according to law of cosines if sides are given and one angle is $a^{2} =b^{2} +c^{2} -2bccos(A)$

We have to just put the values in the above equation.

as $p^{2} =6^{2} +8^{2} -2*6*8cos(39)$ .

p is the side opposite to angle given , the length of other sides are 6 and 8 and angle is 39 degrees.

Hence the side can be written as according to law of cosines if the angle is 39 degrees is as $p^{2} =6^{2} +8^{2} -2*6*8cos(39)$ .

Learn more about trigonometric functions at brainly.com/question/24349828

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1 year ago

Evaluate x2 + 3x – 7+ 8 when x = 4.

Karo-lina-s [1.5K]

Answer:

Step-by-step explanation:

Since they have given you x = 4, simply sub it into the equation,

(4)^2 + 3(4) - 7 + 8

= 29

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3 years ago

Read 2 more answers