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3 years ago

Rt-2n=y solve for t

Mathematics

1 answer:

STALIN [3.7K]3 years ago

7 0

Rt-2n=y -- add 2n
Rt=y+2n -- divide by R

t=(y+2n)/R

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Which is a better deal: A can of 3 tennis balls for $3 or a box of 10 balls for $9?

Kay [80]

Answer:

a box of 10 balls for $9?

Step-by-step explanation:

because u buy 10 tennis balls for 9 dollars and the first one is not true

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hope it helps

6 0

2 years ago

Twelve percent of U.S. residents are in their forties. Consider a group of nine U.S. residents selected at random. Find the prob

miskamm [114]

Answer:

The probability is 28 % ( approx )

Step-by-step explanation:

Since, there are only two possible outcomes in every trails ( residents are in their forties or not ),

So, this is a binomial distribution,

Binomial distribution formula,

Probability of success in x trials,

$P(x)=^nC_x p^x q^{n-x}$

Where, $^nC_x=\frac{n!}{x!(n-x)!}$

p and q are probability of success and failure respectively and n is the total number of trials.

Let X be the event of resident who are in his or her forties.

Here, p = 12% = 0.12,

⇒ q = 1 - p = 1 - 0.12 = 0.88,

n = 9,

Hence, the probability that two or three of the people in the group are in their forties = P(X=2) + P(X=3)

$^9C_2 (0.12)^2 (0.88)^{9-2}+^9C_3 (0.12)^3 (0.88)^{9-3}$

$=36(0.12)^2 (0.88)^7+84(0.12)^3 (0.88)^6$

$=0.279266611163$

$\approx 0.28$

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3 years ago

Express as a ratio in whole numbers 1/2 : 1/4 : 1/12

Gelneren [198K]

Answer:

6 : 3 : 1

Step-by-step explanation:

Given

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= 6 : 3 : 1

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2 years ago

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To figure out long it took for Ingrid to walk her dog,multiply 3*1 and 1/2 or 3*1.5 to get 4.5 hours or 4 and 1/2 hours.

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3 years ago

A graph of x^2 + y^2 = 9 is shown on the grid. By drawing the line x + y = 2, solve the equations x^2 +y^2 =9. x + y = 2

Hatshy [7]

Answer:

Step-by-step explanation:

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2 years ago