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2 years ago

Helpp!!!!! 98 points !!!

Mathematics

2 answers:

Anestetic [448]2 years ago

6 0

Answer:

they don't know the correct length for ad, and they just guessed

Step-by-step explanation:

Mnenie [13.5K]2 years ago

5 0

Answer:

they don't know the correct length for ad, and they just guessed

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Find the equation of the line parallel to the line containing points

Neko [114]

Answer:B

Step-by-step explanation: I took the test already trust me it is correct

4 0

2 years ago

A box with a square base and an open top is being constructed out of A cm2 of material. If the volume of the box is to be maximi

viktelen [127]

Answer:

Side length = $\sqrt{\frac{A}{3} }$ cm , Height = $\frac{1}{2} \sqrt{\frac{A}{3} }$ cm , Volume = $\frac{A\sqrt{A}}{6\sqrt{3} }$ cm³

Step-by-step explanation:

Assume

Side length of base = x

Height of box = y

total material required to construct box = A ( given in question)

So it can be written as

A = x² + 4xy

4xy = A - x²

$y = \frac{A - x^{2} }{4x}$

Volume of box = Area x height

V = x² ₓ y

V = x² ₓ ( $\frac{A - x^{2} }{4x}$ )

V = $\frac{Ax - x^{3} }{4}$

To find max volume put V' = 0

So taking derivative equation becomes

$\frac{A - 3 x^{2} }{4} = 0$

A = 3 $x^{2}$

$x^{2}$ = $\frac{A}{3}$

x = $\sqrt{\frac{A}{3\\} }$

put value of x in equation 1

y = $\frac{A - \frac{A}{3} }{4\sqrt{\frac{A}{3} } }$

y = $\frac{2 \sqrt{\frac{A}{3} } }{4 \sqrt{\frac{A}{3} } }$

y = $\frac{1}{2} \sqrt{\frac{A}{3} }$

So the volume will be

V = $x^{2}$ × y

Put values of x and y from equation 2 & 3

V = $\frac{A}{3} (\frac{1}{2} \sqrt{\frac{A}{3} } )$

V = $\frac{A\sqrt{A}}{6\sqrt{3} }$

8 0

3 years ago

Madeline is saving up to buy a new jacket. She already has $40 and can save an

xeze [42]

Answer:

120

equation: 40+8(10)=120

Step-by-step explanation:

The math for this is $40 initial plus $8x the 10 weeks which equals 80 so

40+80=120

4 0

2 years ago

Three times a number is equal to say when 5 is added to to the number .find the number.

sladkih [1.3K]

Answer:

2.5

Step-by-step explanation:

3x=x+5

2x=5

x=5/2 or x=2.5

5 0

2 years ago

The sum of twice a number and 7 is -19

adoni [48]

Answer:

The number will be -13

Step-by-step explanation:

Let the no. be x

Its twice will be = 2x

According to the question ,

$2x + 7 = -19\\=> 2x = -19 - 7 = -26\\=> x = \frac{- 26}{2} = - 13$

4 0

2 years ago

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