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3 years ago

Find thee value of a2+b2

Mathematics

2 answers:

GaryK [48]3 years ago

6 0

Answer And Step-by-step Explanation :

a^2 + b^2 = (a + b)^2 - 2ab

gregori [183]3 years ago

4 0

Answer: 2a+2b

Step-by-step explanation:

If this is just algebra, then all you need to do is simplify the expression.

it is basically just:

a×a+b×b

So it is basically just: 2a+2b

I dunno if this is correct, but this is how I was taught. :)

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which of the following is the probability that a blue marble will be selected from a bag containing 9 red marbles,6 blue marbles

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Answer:

2/11

Step-by-step explanation:

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Number of blue marbles: 6

p(blue marble) = 6/33 = 2/11

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If 5x-3=8-2x then x=

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3 years ago

If 180°<θ<270°, and sin⁡θ=−3/4, what is the value of sin(−θ)?

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Answer:

$sin(-\theta)=\frac{3}{4}$

Step-by-step explanation:

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3 years ago

In the adjoining figure , APB and AQC are equilateral triangles. Prove that PC = BQ. ( Hint : <img src="https://tex.z-dn.net/?f=

just olya [345]

Answer:

See Below.

Step-by-step explanation:

Statements: Reasons:

$\displaystyle 1)\text{ } \Delta APB \text{ and } \Delta AQC \text{ are equilateral triangles}$ Given

$\displaystyle 2) \text{ } m \angle PAB = 60$ Definition of equilateral.

$3)\text{ } m \angle QAC = 60$ Definition of equilateral.

$4)\text{ } m\angle PAB = m\angle QAC$ Substitution

$5)\text{ } m\angle PAC=m\angle PAB+m\angle BAC$ Angle Addition

$\displaystyle 6)\text{ } m\angle QAB=m\angle QAC+m\angle BAC$ Angle Addition

$7)\text{ } m\angle QAB=m\angle PAB+m\angle BAC$ Substitution

$\displaystyle 8)\text{ } m\angle PAC=m\angle QAB$ Substitution

$9)\text{ } PA=BA$ Definition of equilateral

$10)\text{ } AC=AQ$ Definition of equilateral

$\displaystyle 11)\text{ } \Delta PAC \cong \Delta BAQ$ Side-Angle-Side Congruence*

$\displaystyle 12)\text{ } PC=BQ$ CPCTC

* SAS Congruence:

PA = BA

∠PAC = ∠QAB

AC = AQ

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2 years ago

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