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MArishka [77]
3 years ago
8

Twenty less than a number is at least 15

Mathematics
2 answers:
Monica [59]3 years ago
8 0

Answer:

n - 20 ≥ 15

n ≥  35

Step-by-step explanation:

a number could be greater than or equal to 35 and be a solution

maxonik [38]3 years ago
5 0

Answer:

what??

Step-by-step explanation:

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What is 5(4x)<br><br><br><br><br><br><br><br><br><br><br><br> fastfastfastfast
IRISSAK [1]
It should be 20x because you multiply what’s on the outside (5) with what’s on the inside (4x) which Is also called distributing. :)
3 0
3 years ago
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Strand A changes color every 14 seconds. Strand B changes color every 20. Both strands just changed color. After how many second
Vesna [10]

Answer:

140

Step-by-step explanation:

14, 28, 42, 56, 70, 84, 98, 112, 126, 140.

20, 40, 60, 80, 100, 120, 140.

14 x 10 = 140

20 x 7 = 140

6 0
2 years ago
SOMEONE PLEASE HELP MEE
melomori [17]

Answer:

The missing numbers are 12 and 39 respectively

Step-by-step explanation:

From the table, we can see that the ratio of the left column to the right is 3/5

So at any point in time, the values on a particular row of the table must conform

to this ratio

In other light, we have to multiply what we have on the left by 5/3 to get what’s on the right

and we have to multiply what we have on the right by 3/5 to get what’s on the left

We have this as follows;

20 * 3/5 = 12

and;

65 * 3/5 = 39

6 0
3 years ago
Roberto makes 35% of the shots he attempts in basketball. How many shots does he make if he attempts 20 shots?​
kirill [66]

Answer:

Roberto makes 7 shots

Step-by-step explanation:

35% is 0.35 as a decimal. Multiply the decimal by the total amount of attempted shots.

20(0.35)=7

Roberto makes 7 shots.

3 0
3 years ago
For X a binomial random variable with n=5 and p=1/4, answer the following
mash [69]
Recall that for X\sim\mathrm{Bin}(n,p), i.e. a random variable X following a binomial distribution over n trials and with probability parameter p,

\mathbb P(X=x)=f_X(x)=\begin{cases}\dbinom nx p^x(1-p)^{n-x}&\text{for }x\in\{0,1,\ldots,n\}\\\\0&\text{otherwise}\end{cases}

So you have

\mathbb P(X=2)=\dbinom52\left(\dfrac14\right)^2\left(1-\dfrac34\right)^{5-2}=\dfrac{135}{512}\approx0.26

\mathbb P(2\le X\le4)=\displaystyle\sum_{x=2}^4\mathbb P(X=x)
=\dbinom52\left(\dfrac14\right)^2\left(1-\dfrac14\right)^{5-2}+\dbinom52\left(\dfrac14\right)^3\left(1-\dfrac14\right)^{5-3}+\dbinom52\left(\dfrac14\right)^4\left(1-\dfrac14\right)^{5-4}
=\dfrac{375}{1024}\approx0.37

The expected value of X\sim\mathrm{Bin}(n,p) is simply np, while the standard deviation is \sqrt{np(1-p)}. In this case, they are \dfrac54=1.25 and \sqrt{\dfrac{15}{16}}\approx0.97, respectively.
7 0
3 years ago
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