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3 years ago

8

Joy walks 60 m to a slide in 180 sec. and slides down 9 times faster than she walks. If it takes 30 sec. to slide down, how long

is the slide?

1 answer:

mario62 [17]3 years ago

3 0

60 times 9 equals 54 54/180 = x/30 Solve for x to get 9 The slide is 9 m long

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I'm not sure about my answer I think it's b or c

Sonja [21]

Answer: its actually a

Step-by-step explanation:

A = -5 ( -9 / 3 = -3; -3 -2 =-5)

B= - 2

C = -2

D = 0

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3 years ago

Katherine and her children went into a bakery and where they sell cupcakes for $2.50 each and donuts for $1.25 each. Katherine h

yan [13]

Answer:the ration to x and b that equals c is about 3 dollars

Step-by-step explanation:

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3 years ago

Joanie bought a total of 56 presents to put in 7 gift bags.She put 3 pencils and an equal number of stickers in each bag.How man

amid [387]

Answer:

5 stickers were put in each bag.

Step-by-step explanation:

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3 years ago

According to police sources, a car with a certain protection system will be recovered 87% of the time. Find the probability that

WITCHER [35]

Answer: 0.01145

Step-by-step explanation:

We use Binomial distribution , where the probability of getting x successes in n trial is given by :-

$P(x)=^nC_xp^x(1-p)^{n-x}$ , p = probability of getting each success in each trial.

As per given

The proportion that a car with a certain protection system will be recovered= p=0.87

n= 8

Let x be the number of cars will be recovered.

Then, the probability that 4 of 8 stolen cars will be recovered:

$P(X=4)=^8C_4(0.87)^4(1-0.87)^{8-4}$

$=\dfrac{8!}{4!(8-4)!}(0.87)^4(0.13)^4\\\\= 70(0.57289761)(0.00028561)\\\\=0.0114537700474\approx0.01145$

Hence, the required probability is 0.01145.

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3 years ago

Hugo puts $200.00 into an account to use for school expenses. The account earns 13% interest, compounded annually. How much will

TiliK225 [7]

Answer:

y=200(1.13)^6= 416.39

Step-by-step explanation:

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3 years ago