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3 years ago

Three groups of students used different methods to estimate the diagonal length of a patio in feet. Their results were:

Mathematics

1 answer:

podryga [215]3 years ago

5 0

F14.33 1425,413 that’s the right number

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(x-1)(x-3)(x+5)(x+7)=297

mihalych1998 [28]

First simplify the expression into polynomial form,

$(x-1)(x-3)(x+5)(x+7)=297$

$x^4+8x^3-10x^2-104x+105=297$

$x^4+8x^3-10x^2-104x-192=0$

Now factor into,

$(x-4)(x+8)(x^2+4x+6)=0$

Which means the solutions are,

$x-4=0\implies\boxed{x_1=4}$

$x+8=0\implies\boxed{x_2=-8}$

and then two complex solutions because determinant of the third factor $D\lt0$ ,

$x^2+4x+6=0$

$x^2+4x+4=-2$

$(x+2)^2=-2\implies\boxed{x_3=i\sqrt{2}-2},\boxed{x_4=-i\sqrt{2}-2}$

Hope this helps :)

5 0

3 years ago

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PLEASE HELP I WILL MARK BRAINLIEST

Eddi Din [679]

Answer:

Idk,can't do this.UwU

Step-by-step explanation:

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3 years ago

BRAINLIEST AND 20 POINTS

Mice21 [21]

Taking a wild guess here but I think it is D...

If wrong, let me know.

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3 years ago

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Gavin bought snacks for his team's practice. He bought a bag of apples for $2.50 and a 18-pack of juice bottles. The total cost

boyakko [2]

Answer: 87 c

Step-by-step explanation:

To evaluate the cost per juice box, we must first factor out the bag of apples from the equation. So we will disregard the price of the apples from the total price and also disregard the existence of the apples altogether.

Our new subtotal is $15.66 for eighteen juiceboxes. To find the cost for one juicebox, we divide the price & the # of juiceboxes by 18.

15.66÷18=0.87, therefore each juicebox is 87 cents.

3 0

3 years ago

The ratios in a equivalent ratio table are 3:12, 4:16, and 5:20. If the ratio is 10, what is the second number? Justify your rea

anzhelika [568]

Answer:

Step-by-step explanation:

If you look at the ratios you can see the pattern of the first number being multiplied by 4 everytime. Therefore you must multiply 10 by 4.

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3 years ago