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babymother [125]
3 years ago
6

What is the surface area of this square pyramid

Mathematics
2 answers:
My name is Ann [436]3 years ago
8 0

Answer 144 ft2

Step-by-step explanation:

KatRina [158]3 years ago
7 0

Answer:

The surface area is 81 feet squared

Step-by-step explanation:

IM SO SORRY! the answer is 33 feet squared

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5/8 divided by 7/10 for the lowest fraction
o-na [289]

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5/8 ÷ 7/10 = 25/28

Uh i believe this is the lowest fraction it can go to

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question 6:

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x^{2} - 9x + 20 and (x - 4)(x - 5)

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(x + 1) (x - 17)

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3 years ago
Twin brothers, Billy and Bobby, kid mother grandparents lawn together for 60 minutes. Billy could mow the lawn by himself in 20
Dovator [93]

Answer:

Bobby around 131 minutes and Billy around 111 minutes

Step-by-step explanation:

To solve the problem it is important to raise equations regarding what happens.

 They tell us that Billy (Bi) and Bobby (Bo) can mow the lawn in 60 minutes. That is to say that what they prune in a minute is giving as follows:

1 / Bo + 1 / Bi = 1/60 (1)

They say Billy could mow the lawn only in 20 minutes less than it would take Bobby, therefore

1 / Bi = 1 / (Bo-20) (2)

Replacing (2) in (1) we have:

1 / Bo + 1 / (Bo-20) = 1/60

Resolving

(Bo - 20 + B0) / (Bo * (Bo-20) = 1/60

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Rearranging:

Bo ^ 2 - 140Bo -1200 = 0

Now applying the general equation

Bo = 130.82 or Bo = 9.17, <em>this last value cannot be because Billy took 20 minutes less and neither can he prune faster than the two together</em>, therefore Bobby only takes around 131 minutes and Billy around 111 minutes

Checking with equation 1:

1/131 +1/111 = ~ 1/60

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3 years ago
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Arturiano [62]

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