140 Answered Questions for the topic Proofs

11/03/16

#### First solve the equation. Then, use that information to write the paragraph proof below. - Explain & Show Work

If a = 4, b = 3, solve for x. First solve the equation. Then, use that information to write the paragraph proof below.
9 = ax - b(x-2)

11/02/16

#### All Mixed Up: The proofs below are all mixed up. Rearrange either the statements or the reasons so the proofs make sense. - Explain & Show Work

Statementsa. PQ = RSb. QR = QRc. PQ + QR = RS + QRd. PR = PQ + QR
QS = QR + RSe. PR = QS Reasons a. Reflexive Property of Equalityb. Substitution Property of Equalityc. Givend. Addition Property...
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#### All Mixed Up: The proofs below are all mixed up. Rearrange either the statements or the reasons so the proofs make sense. - Explain & Show Work

Statements
a. 2x+5 = (1/2x) + 8
b. 2(2x+5_ = 2(1/2x + 8)
c. 4x+10 = x + 16
d. 3x + 10 = 16
e. 3x = 6
f. x = 2
Reasons
a. Distribitive property
b. Subtraction Property of...
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#### I need help with this proof!

Given: B is the midpoint of AC and DL
Prove: Triangle ADB and Triangle CLB are congruent

Proofs Geometry

10/18/16

#### I need help solving this Geometry Proof!

Given: AD = CDDB bisects ACProve: Triangle ADB = Triangle CDB

Proofs

10/13/16

#### Given: AG bisects CD, IJ bisects CE and BH bisects ED Prove: KE ? FD

I dont understand this and im currently dying

#### Two-colmn Proof - Geometry - Please Help ASAP

This is supposed to be a two column proof. It has statements on one side and reasons on the other.
Given:Triangle ABC with angle C is right angle
Prove:Angle A and angle B are...
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Proofs Mathematical Induction

10/10/16

#### Proof by induction

1 × 3 + 3 × 5 + 5 × 7 + . . . + (2n − 1)(2n + 1) = n(4n2 + 6n − 1)/3.

Proofs Mathematical Induction

10/10/16

#### proof by induction

Use the method of proof by induction to show that (1+x+x2 +. . .+xn-1)(1−x) = (1−xn), for all positive integers n

Proofs Maths

10/02/16

#### Maths Proof

Show that the product of the first n even positive integers is 2^n(n!)
Apparently you can show this on one single line (which is required)

04/19/16

#### 10 Very challenging proof: Prove that for every natural number n, cos(nx) can be expressed as a polynomial in cos(x) of degree n

Pleas helm me with this. Its a practice problem, and I do not know how to do it. Thanks!

Proofs Linear Algebra

03/03/16

#### Let A be a 3x3 matrix...Can't figure out proof for my linear algebra homework

(a11 a12 a13)
A= (a21 a22 a23)
(a31 a32 a33)
and let C1 C2 C3 be the first, second, and third column respectively (counting from the left) of A.
[x1]
A. Let X=...
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02/05/16

#### Prove Statement using the First Principle of Mathematical Induction

Prove the following statements using the First Principle of Mathematical Induction:(a) If r ≠ 1, then1 + r + r2 + ... + rn = (1 − rn+1)/(1-r)
for all n ∈ N. Why does the formula not work when r =...
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#### please help me sap with this calculus proof with differentiation

performing any differentiation with a calculator that can determine gradient functions, show that for an isosceles triangle of fixed perimeter to have a maximum are the triangle needs to be...
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Proofs

01/09/16

#### Give segment ae is congruent to ce, segment ab is congruent to segment cd, and e is the midpoint of segment bd. Prove triangle eab is congruent to triangle ecd

The triangles are iscoles.

12/21/15

#### Please prove that cot A + cot B + cot C = (a^2 + b^2 + c^2)/(4(area of triangle ABC)).

I need help with this proof. Please help me.

11/17/15

#### If a quadrilateral has one pair of opposite congruent sides and one pair of opposite congruent angles why does that not prove that it is a parallelogram?

please answer quickly!!!!

#### Prove: (secx+tanx)^3(secx-tanx)^4=1-sinx/cosx

Prove: (secx+tanx)^3(secx-tanx)^4=1-sinx/cosx
Please show the steps and prove this by making both sides equivalent to each other. Also, please include which identities follow with each step! :)

#### Prove : coth^2 - 1 = csch^2x

Prove : coth2 (x) - 1 = csc2 (x)
cosh2 1
____ - 1 = ________
sinh2 sinh2
Then I substituted in the definitions of sinh...
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Proofs

09/16/15

#### two column angle proofs

GIVEN-Angle 1and angle 2 form a linear pair
Measurement of angle 2 + measurement of angle 3 + measurement of angle 4 = 180
PROVE-measurement of angle 1 = measurement of angle 3 + measurement...
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#### Geometry Proof Help

I need someone to check my work please.
---
Complete the proof by filling in the missing reasons.
Given: CB is perpendicular to BD, DE is perpendicular to EC, CB = DE
Prove: Triangle DBC =...
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03/29/15

#### what does the angles of a reactagle equal when split up into for trianglular regions

If angle EDC is 32° and E is the midpoint of all the sides what is the measures of all other angles.
Thank you!

03/29/15

#### Can you solve my proof

Given: segment DE is parallel to segment BC
H is the midpoint of segment DF and segment AB
I is the midpoint of segment AF
Prove: triangle ABC is congruent to triangle DFE

Proofs Math Proofs

02/13/15

#### How to prove that there is no r in the rationals such that r^2 = 6

Can someone help me write a full proof for this

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