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Inessa05 [86]
3 years ago
14

When 3 is substituted for x, in the equation y=x-7, what is y?

Mathematics
1 answer:
garri49 [273]3 years ago
6 0

Answer:

-4

Step-by-step explanation:

y=x-7

plug in 3

y=3-7

y=-4

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koban [17]
(-3x + 15) + (-3x + 2)
Simplify by combining like terms.
-6x + 17

-6x + 17
3 0
3 years ago
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Suppose we have an unfair coin that its head is twice as likely to occur as its tail. a)If the coin is flipped 3 times, what is
Alenkinab [10]

Answer: a) 0.2222, b) 0.3292, c) 0.1111

Step-by-step explanation:

Since we have given that

Let the probability of getting head be p.

Since,  its head is twice as likely to occur as its tail.

p+\dfrac{p}{2}=1\\\\\dfrac{3p}{2}=1\\\\p=\dfrac{2}{3}

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So, here, n  = 3

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q=\dfrac{1}{3}

Now,

P(X=1)=^3C_1(\dfrac{2}{3})^1(\dfrac{1}{3})^2=0.2222

b)If the coin is flipped 5 times, what is the probability of getting exactly 2 tails?

2 tails means 3 heads.

So, it becomes,

P(X=3)=^5C_3(\dfrac{2}{3})^3(\dfrac{1}{3})^2=0.3292

c)If the coin is flipped 4 times, what is the probability of getting at least 3 tails?

P(X\leq 1)=\sum _{x=0}^1^4C_x(\dfrac{2}{3}^x(\dfrac{1}{3})^{4-x}=0.1111

Hence, a) 0.2222, b) 0.3292, c) 0.1111

8 0
3 years ago
What is the answer for this 4² × 4²
Alik [6]

Answer:

4squared is 16 so 16×16=256

hope it help

6 0
2 years ago
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Multiply q by r, subtract p from the result, then triple what you have
Annette [7]
3((q*r)-p)

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6 0
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2x = 5x - 30 how do i get x
solmaris [256]
Get x to one side by subtracting 2x by 5x.

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Then divide both sides by -3 to get x = 10

Have a nice day.
6 0
3 years ago
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