2 years ago

FOR BRAINLIEST PLEASE HELP!!!!!!!

Mathematics

1 answer:

fiasKO [112]2 years ago

3 0

I think it's C. drawing a king from a deck

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ASAP h(t)=-5t^2+5t+10 Please help me find roots and roots equation

Alex

Answer:

t = -1, 2

Step-by-step explanation:

Step 1: Define

h(t) = -5t² + 5t + 10

Step 2: Factor

h(t) = -5(t² - t - 2)

h(t) = -5(t - 2)(t + 1)

Step 3: Find roots

0 = -5(t - 2)(t + 1)

0 = (t - 2)(t + 1)

t - 2 = 0

t = 2

t + 1 = 0

t = -1

8 0

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.

5 0

3 years ago

Subtract. (4x + 7) - (x+1) A. 3x + 8 B. 3x + 6 C. 4x + 8 O D. 4x + 6 Lmk

Studentka2010 [4]

Answer:

4x + 7 - ( x + 1)

Remove the bracket

We get

4x + 7 - x - 1

= 3x + 6

That's option B

Hope this helps.

8 0

2 years ago

Read 2 more answers

Plz help. Thank youuu

Natalija [7]

Answer:

Step-by-step explanation:

cause

3 0

2 years ago

46 Two light houses ash their lights every 30 seconds and 40 seconds respectively. Given that they last ashed together at 10:40

IRISSAK [1]

30,60,90,120
40,80,120

they will both " ash " in 120 seconds (thats 2 minutes)...so they will both ash at
10:42 a.m.

8 0

3 years ago