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3 years ago

Combine the like terms to create an equivalent expression. 5n-2n

Mathematics

2 answers:

Setler79 [48]3 years ago

5 0

Answer:

Step-by-step explanation:

When subtracting like terms (numbers, or variable expressions that have the same variable, like these), you add the coefficients (the numbers attached to the variable) to simplify the expression.

5n - 2n

You have 5 "n"s and you subtract 2 "n"s, leaving you with 3 "n"s

nevsk [136]3 years ago

4 0

Answer:

Step-by-step explanation:

5n - 2n = (5-2)n

=3n

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If 28% of students in College are near-sighted, the probability that in a randomly chosen group of 20 College students, exactly

cluponka [151]

Answer: (D) 16%

Step-by-step explanation:

Binomial probability formula :-

$P(x)=^nC_xp^x(1-p)^n-x$ , where n is the sample size , p is population proportion and P(x) is the probability of getting success in x trial.

Given : The proportion of students in College are near-sighted : p= 0.28

Sample size : n= 20

Then, the the probability that in a randomly chosen group of 20 College students, exactly 4 are near-sighted is given by :_

$P(x=4)=^{20}C_4(0.28)^4(1-0.28)^{20-4}\\\\=\dfrac{20!}{4!16!}(0.28)^4(0.72)^{16}\\\\=0.155326604912\approx0.16\%$

Hence, the probability that in a randomly chosen group of 20 College students, exactly 4 are near-sighted is closest to 16%.

7 0

3 years ago

franklin is thinking of two numbers. the sum of the two numbers is 40.the first number x, is 11 less than twice the second numbe

vampirchik [111]

Answer: d) x+y =40

x=2y -11

Step-by-step explanation:

5 0

3 years ago

Find c. Select the letter of the solution.

OlgaM077 [116]

Answer:140

Step-by-step explanation:

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2 years ago

Given 4 < x < 9 and 5 - y< 4 , where x and y are integers. Find the maximum value of x-y.

djyliett [7]

Answer:

You want to maximize x and minimize y

Maximum y = 8

Minimum y = 10

8-10= -2

7 0

2 years ago

Sales of 10000 increased by 65% each year write a function that represents the situation

erastovalidia [21]

Answer: $y=10000(1.65)^x$

Step-by-step explanation:

Given: The sales of 10000 increased by 65% each year .

Let x be the number of years.

The rate of growth=65%= 0.65

The exponential growth function is given by

$y=A(1+r)^x$

, where A is initial amount and r is the rate of growth in decimal.

Then the increase in the sales id given by :-

$y=10000(1+0.65)^x\\\Rightarrow\ y=10000(1.65)^x$

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3 years ago