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2 years ago

What expression shows 4 less than a number? A. n + 4 B. n - 4 C. 4 - n D. n(4)

Mathematics

2 answers:

SCORPION-xisa [38]2 years ago

7 0

$\huge \text{Hiya!}$

Answer:

<em>Option B. n - 4</em><em> Is my Answer</em>

Step-by-step explanation:

n - 4 is showing 4 less than a number n.

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<h2>what is an experssion?</h2>

an expression is one or a group of terms that may include. variables, constants, operators, and grouping symbols.

I hope this helps you!

Have a great day!

$-Joseph-$

Elis [28]2 years ago

3 0

Answer:

Step-by-step explanation:

Because the expression in b is saying whatever number n is say 9 then your subtracting 4 by N or like I said take 9 for an example which=5

hope it helps

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If x-y= -10 and x-y=2 what is the value of x

sp2606 [1]

No solution , because x-y = -10 therefore x-y can’t be -2

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3 years ago

There are three urns that each contain 10 balls. The first contains 3 white and 7 red balls, the second 8 white and 2 red, and t

malfutka [58]

Answer:

(a) 0.0520

(b) 0.3699

Step-by-step explanation:

Let $E_{1},E_{2},E_{3}$ be the events of selecting urn 1, urn 2 and urn 3 respectively.

So, $P(E_{1})=P(E_{2})=P(E_{3})=\frac{1}{3}$

Let W be the event of drawing a white ball.

Now, probability of drawing 2 white balls from urn 1 is given as:

$P(W\cap W \cap E_{1})=P(E_{1})\times P((W\cap W)/E_{1})\\P(W\cap W \cap E_{1})=\frac{1}{3}\times (\frac{3}{10})^{2}=\frac{9}{300}$

Probability of drawing 2 white balls from urn 2 is given as:

$P(W\cap W \cap E_{2})=P(E_{2})\times P((W\cap W)/E_{2})\\P(W\cap W \cap E_{2})=\frac{1}{3}\times (\frac{8}{10})^{2}=\frac{64}{300}$

Probability of drawing 2 white balls from urn 3 is given as:

$P(W\cap W \cap E_{3})=P(E_{2})\times P((W\cap W)/E_{2})=\frac{1}{3}\times 1=\frac{1}{3}$ ............. (as all balls are white only)

Now, probability of drawing 2 white balls is the sum of all the above probabilities and is given as:

$P(2W)=P(W\cap W \cap E_{1})+P(W\cap W \cap E_{2})+P(W\cap W \cap E_{3})\\P(2W)=\frac{9}{300}+\frac{64}{300}+\frac{1}{3}\\P(2W)=\frac{9}{300}+\frac{64}{300}+\frac{100}{300}=\frac{9+64+100}{300}=\frac{173}{300}$

(a)

Probability of selecting urn 1 given that 2 white balls are drawn is:

$P(E_{1}/2W)=\frac{P(E_{1})\times P(2W/E_{1})}{P(2W)}\\P(E_{1}/2W)=\frac{\frac{9}{300}}{\frac{173}{300}}=\frac{9}{173}=0.0520$

Therefore, probability of selecting urn 1 given that 2 white balls are drawn is 0.0250.

(b)

Probability of selecting urn 2 given that 2 white balls are drawn is:

$P(E_{2}/2W)=\frac{P(E_{2})\times P(2W/E_{2})}{P(2W)}\\P(E_{2}/2W)=\frac{\frac{64}{300}}{\frac{173}{300}}=\frac{64}{173}=0.3699$

Therefore, probability of selecting urn 2 given that 2 white balls are drawn is 0.3699

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4 years ago

Which problem can be solved using this equation .15m + 35=.25. + 20

IrinaK [193]

I think the number 1 because it can be mutilplief by any and give u the same answer

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3 years ago

What are the vertices of ΔA'B'C produced by T⟨−3, 6⟩ (ΔABC) = ΔA'B'C?

FinnZ [79.3K]

Answer: (3x - 12, 3y +6)

Step-by-step explanation:A dilation is a transformation that produces an image that is the same shape as ... The dilation (centered at O with a scale factor of 2) of ΔABC = ΔA'B'C' making ... from O to the vertices of ΔA'B'C' are twice the distances from O to ΔABC. ... Apply the dilation formula when centered at origin: (3(x - 4), 3(y + 2)) = (3x - 12, 3y + 6)

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3 years ago

Thomas invested $40,000. He put part of the money in an account paying 2% interest and the remainder

Rainbow [258]

Answer:

18,000 at 2%

22,000 at 3%

Step-by-step explanation:

x: the amount in account paying 2% interest

y: the amount in stock paying 3% interest

x + y = 40,000

2%. x + 3%. y = 1020

⇒ x = 18,000

y = 22,000

5 0

3 years ago