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3 years ago

PLs help.......................

Mathematics

2 answers:

Sergeeva-Olga [200]3 years ago

7 0

Answer:

d) 40/-9

sorry lol im writing this bc it has to be 20 characters long

Lelechka [254]3 years ago

5 0

Your Answer Is C)

I mean like Come on how do you not know this?

Yeah and give me brainliest i need it

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zhannawk [14.2K]

If $\ell$ is the length and $w$ the width, then $\ell=2w-2$ .

Since the area of the rectangle is

$\ell w=40$

you have

$(2w-2)w=40\implies 2w^2-2w-40=0\implies w^2-w-20=0$

Factoring the left hand side gives

$(w-5)(w+4)=0\implies w=5,w=-4$

Obviously the width can't be negative, so $w=5$ . This means D is the answer, since it's the only option with this measure.

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3 years ago

A square is inscribed in a quarter of a circle,calculate the quarter circle.

Anna [14]

Answer:

Step-by-step explanation:

6 0

2 years ago

<img src="https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B4%7D%20%20-%2016%20%3D%20" id="TexFormula1" title=" {x}^{4} - 16 = " alt=" {x

FrozenT [24]

Answer:

$(x - 2) \times (x + 2) \times ( {x}^{2} + 4)$

Step-by-step explanation:

${x}^{4} - 16$

➡️ ${x}^{2 \times 2} - 16$

➡️ ${x}^{2 \times 2} - {4}^{2}$

➡️ $( {x}^{2} {)}^{2} - {4}^{2}$

➡️ $( {x}^{2} - 4) \times ( {x}^{2} + 4)$

➡️ $(x - 2) \times (x + 2) \times ( {x}^{2} + 4)$

5 0

3 years ago

3. Use the figure to complete each statement.

ELEN [110]

A. m<BED = 90°

b. axis

c. AB

d. 9

e. E ~ AB

6 0

4 years ago

6c to te second power - 5d + 8

mina [271]

Lets see,
6c to the second power is 36c because 6c times 6c is 36 c
And since the variables are different and only one number doesn't have a variable,
The answer would be, 36c-5d+8

7 0

4 years ago