H (x)=x^2-5 Find h (-7)
2 answers:
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Answer:
Step-by-step explanation:
∠1 and ∠2 are vertical angles.
∠1 = ∠2
<u>Part A:</u>
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Create an equation and solve for x.
20x + 21 = 30x - 29
Add 29 and -20x on both sides.
20x + 21 + 29 - 20x = 30x - 29 + 29 - 20x
Simplify the equation.
50 = 10x
Divide both sides by 10.
=
Simplify the equation.
5 = x
Switch sides.
x = 5
<u>Part B:</u>
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Let x = 5
20(5) + 21
Distribute.
100 + 21
Add.
= 121
Since both angles are vertical angles, they are equal.
∠1 = 121°
∠2 = 121°
Observe the figure given.
Given: ABCD is a parallelogram.
To prove: ABCD is a rhombus
Statement
1. ABCD is a parallelogram. AC bisects .
Reason: Given
2.
Reason: Definition of an angle bisector
3.
Reason: Reflexive property of congruence
4.
Reason: ASA Postulate
5.
Reason: corresponding parts of congruent triangles are equal.
6.
Reason: Opposite sides of the parallelogram are congruent.
7.
Reason: Transitive property of congruence
8. ABCD is a rhombus
Reason: Definition of rhombus