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3 years ago

Question 2

1 answer:

5 0

Your answer would be c and d because coefficients are the numbers that go in front of the variables. Have a nice day I hope this helped :)

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4x-5(3x+10)=126<br><br> what’s the value of X?

nordsb [41]

X= -16 brahhhhh you’re welcome

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3 years ago

Fill in the blank.<br> 65+26 is the same as 61 +

solniwko [45]

Answer:

Step-by-step explanation:

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4 years ago

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In a quadrilateral ABCD, angle A + angle D = 90°. Prove that AC^2 + BD^2 = BC^2 + AD^2

olga2289 [7]

Answer:

$AD^{2}+BC^{2}=AE^{2}+ED^{2}+BE^{2}+EC^{2}$

$AC^{2}+BD^{2}=AE^{2}+EC^{2}+BE^{2}+ED^{2}$

Hence prove.

$AC^{2}+BD^{2}=BC^{2}+AD^{2}$

Step-by-step explanation:

Given:

∠A + ∠D = 90°

We are prove to that

$AC^{2}+BD^{2}=BC^{2}+AD^{2}$

Solution:

See required figure in attached file.

We know sum of the all angles of a triangle is 180°.

So, in triangle AED.

∠A + ∠E + ∠D = 180°

∠E + (∠A + ∠D) = 180°

Now, we substitute ∠A + ∠D = 90° in above equation.

∠E + 90° = 180°

∠E = 180° - 90°

∠E = 90°

Using Pythagoras Theorem for triangle ADE and triangle BEC.

$AD^{2}=AE^{2}+ED^{2}$

$BC^{2}=BE^{2}+EC^{2}$

Now, we add both above equations.

$AD^{2}+BC^{2}=AE^{2}+ED^{2}+BE^{2}+EC^{2}$ --------(1)

Similarly, Using Pythagoras Theorem for triangle AEC and triangle BED.

$AC^{2}=AE^{2}+EC^{2}$

$BD^{2}=BE^{2}+ED^{2}$

Now, we add both above equations.

$AC^{2}+BD^{2}=AE^{2}+EC^{2}+BE^{2}+ED^{2}$ --------(2)

We get From equation 1 and equation 2.

$AC^{2}+BD^{2}=BC^{2}+AD^{2}$

Hence prove,

$AC^{2}+BD^{2}=BC^{2}+AD^{2}$

4 0

3 years ago

The Pythagorean Identity states that: (sin x)2 + (COS x)2 = 1 Given sin 0 = 3/5, find cos 0. cos 0= ?/? Simplify the fraction. E

Alex787 [66]

Answer:

cosθ = 4/5

Step-by-step explanation:

7 0

3 years ago

PLEASE HELP MEEE PLEASEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

masya89 [10]

Ok i’ll try to help

split the prism into two rectangle, one 5ft by 3ft and one 3ft by 2ft

multiple 5 and 3 to find the area of the first rectangle

5x3=15

then multiple 3 and 2 to find the area of the second rectangle

3x2=6

add up 15 and 6 to find the area of the total figure

your answer should be 21

hope this helped!!

3 0

2 years ago