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2 years ago

Please help worth 20 points! (this is legit my math grade .-.)

Mathematics

2 answers:

Natasha2012 [34]2 years ago

5 0

Answer:

Step-by-step explanation:

a true

b false

Rina8888 [55]2 years ago

4 0

Step-by-step explanation:

$\bold{ a)True }$
$\bold{b)false }$

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Zero product property: (x-4)(-5x+1)=0 lesser x= greater x=

GaryK [48]

Answer:

lesser x= (x-4)greater x=(-5x+1)

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2 years ago

If a greyhound can run up to 50mi/h. How long would it take a greyhound to run 10 mi?

dolphi86 [110]

Answer:

12 minutes

Step-by-step explanation:

(50miles/60 minutes)/5 = 10 miles/12 minutes

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2 years ago

–3(x – 14) + 9x = 6x + 42

sesenic [268]

Answer:

All real numbers

0 = 0

Step-by-step explanation:

Hope i'm right

Solving this equation results in the statement 0 = 0. Because this is a true statement, the equation has infinitely many solutions.

3 0

2 years ago

Read 2 more answers

Please help me answer this question!!! and explain bc im very stupid and my grades are low. 15 points

mariarad [96]

Answer:

Step-by-step explanation:

The top angle is 90 degrees, so I would assume that m<1 is 90 degrees. Plugging this into the equation gives us 90 = 4y + 22. Subtract 22 from both sides, and we get 68 = 4y. Divide both sides by 4, and we get 17 = y.

6 0

3 years ago

Question 4 options: Find the mean and standard deviation for a binomial distribution with 680 trials and a probability of succes

lys-0071 [83]

Answer:

Mean for a binomial distribution = 374

Standard deviation for a binomial distribution = 12.97

Step-by-step explanation:

We are given a binomial distribution with 680 trials and a probability of success of 0.55.

The above situation can be represented through Binomial distribution;

$P(X=r) = \binom{n}{r}p^{r} (1-p)^{n-r} ; x = 0,1,2,3,.....$

where, n = number of trials (samples) taken = 680 trials

r = number of success

p = probability of success which in our question is 0.55

So, it means X ~ $Binom(n=680, p=0.55)$

Now, we have to find the mean and standard deviation of the given binomial distribution.

Mean of Binomial Distribution is given by;

E(X) = n $\times$ p

So, E(X) = 680 $\times$ 0.55 = 374

Standard deviation of Binomial Distribution is given by;

S.D.(X) = $\sqrt{n \times p \times (1-p)}$

= $\sqrt{680 \times 0.55 \times (1-0.55)}$

= $\sqrt{680 \times 0.55 \times 0.45}$ = 12.97

Therefore, Mean and standard deviation for binomial distribution is 374 and 12.97 respectively.

3 0

3 years ago