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3 years ago

Evaluate the expression below if x=-1 and y=3. 3x²-y²

Mathematics

2 answers:

svlad2 [7]3 years ago

8 0

The answer is -12 I believe

Dmitry [639]3 years ago

7 0

Answer:

-6

Step-by-step explanation:

3x² - y²

plug in x and y

3(-1)² - (3)²

according to PEMDAS, solve the exponents first.

3(1) - 9

multiply

3 - 9

subtract

= -6

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This is geometry please help

EastWind [94]

Answer:

x = 31°

Step-by-step explanation:

$\triangle ABC \cong \triangle DCE... (given) \\\\\therefore m\angle B = m\angle E..(cact)\\\\\because m\angle B = 61\degree \\\\\therefore m\angle E = 61\degree \\\\In \: \triangle DCE\\\\m\angle D+ m\angle C + m\angle E = 180\degree \\(by \: interior \: angle \: sum \: property \: of \: a triangle) \\\\2x\degree + 57\degree + 61\degree= 180\degree \\\\2x\degree + 118\degree = 180\degree \\\\2x\degree = 180\degree - 118\degree \\\\2x\degree = 62\degree \\\\x = \frac{62\degree}{2} \\\\x = 31\degree$

3 0

3 years ago

(8x +6) = <br> (8x +6) =<br> 8x=<br> x =

dem82 [27]

Step-by-step explanation:

8x +6° +118° = 180° ( linear pair)

=> 8x = 180°-124°

=> 8x = 56°

=> x = 7°

hope this helps you.

7 0

2 years ago

Solve the equation 425x=850

mylen [45]

Answer:2

Step-by-step explanation:

DIVIDE 425 ON BOTH SIDES

AND U WILL GET 2

7 0

3 years ago

Please help me out on this

LenKa [72]

Answer:

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5 0

3 years ago

1) State the area of the given trapezoid.

Ber [7]

Answer:

The answer would be 26

Step-by-step explanation:

First I divided the shape to make a rectangle and a right angle triangle, then i calculated the shape of the rectangle which came out to be 20. After that I calculated the area of the right angle triangle which is 6. So The answer would be 6 + 20 = 26

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2 years ago