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3 years ago

How do you solve 5-x=12

1 answer:

3 0

<span>5-x=12
Subtract 5 from both sides
-x=7
Divide -1 on both sides so that the only thing remaining is x alone
Final Answer: x= -7</span>

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I need help i dont understand this

Nata [24]

Answer:

Step-by-step explanation:

Given the 2 equations

4x + 8y = 21 → (1)

y = - $\frac{1}{2}$ x + 3 → (2)

Substitute y = - $\frac{1}{2}$ x + 3 into (1)

4x + 8(- $\frac{1}{2}$ x + 3 ) = 21 ← distribute parenthesis on left side

4x - 4x + 24 = 21 ( subtract 24 from both sides )

0 = - 3 ← not possible

This indicates the system has no solutions

5 0

3 years ago

Can someone pls help me with this? I will give 20 points

Ierofanga [76]

Okay here we go!

The answer is D.

Because when you solve the equation you get 2 and that means the arrow has to be or end at 2.

HOPE THIS HELPED! :)

4 0

3 years ago

The students in Mr. Rivera's art class are designing a stained-glass window to hang in the school entryway. The window will be4

Studentka2010 [4]

40 square feet, since 4x10 is equal to 40.

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3 years ago

.If you earn $8 per hour after taxes are taken out of your paycheck and your insurance is $200 a month, how many hours will you

Anastaziya [24]

200÷8= 25

25 hours would have to be worked to pay for insurance.

4 0

2 years ago

If a procedure meets all of the conditions of a binomial distribution except the number of trials is not fixed, then the geomet

morpeh [17]

Answer:

The probability is 0.0428

Step-by-step explanation:

First, let's remember that the binomial distribution is given by the formula:

$P(X=k) =\left[\begin{array}{ccc}n\\k\end{array}\right] p^{k}(1-p)^{n-k}$ where k is the number of successes in n trials and p is the probability of success.

However, the problem tells us that when there isn't a number of trials fixed, we can use the geometric distribution and the formula for getting the first success on the xth trial becomes:

$P(X=x) = p(1-p)^{x-1}\\$

The problem asks us to find the probability of the first success on the 4th trial (given that the first subject to be a universal blood donor will be the fourth person selected)

Using this formula with the parameters given, we have:

p = 0.05

x = 4

Substituting these parameters in the formula and solving it, we get:

$P(X=4) = 0.05(1-0.05)^{4-1}\\P(X=4) = 0.05 (0.95)^{3}\\P(X=4) = 0.05(.8573)\\P(X=4) = 0.0428$

Therefore, the probability that the first subject to be a universal blood donor is the fourth person selected is 0.0428 or 4.28%

7 0

3 years ago