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2 years ago

Which graph represents a system of equations with one solution?

Mathematics

2 answers:

Brums [2.3K]2 years ago

7 0

Answer:

the one on the right which a parallel line

Step-by-step explanation:

Ivahew [28]2 years ago

4 0

Answer: show all the answer choices

Step-by-step explanation:

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Find the expected value and the variance of the number of times one must throw a die until the outcome 1 has occurred 5 times.

Kazeer [188]

Answer: E(X) = 30; Var[X] = 180

Step-by-step explanation: This is a Bernoulli Experiment, i.e., the experiment is repeated a fixed number of times, the trials are independents, the only two outcomes are "success" or "failure" and the probability of success remains the same, So, to calculate Expected Value, which is the mean, in these conditions:

$E(X)=\frac{r}{p}$

r is number of times it is repeated

p is probability it happens

Solving:

$E(X)=\frac{5}{1/6}$

E(X) = 30

Variance is given by:

$Var[X]=\frac{r(1-p)}{p^{2}}$

$Var[X]=\frac{5(1-1/6)}{(1/6)^{2}}$

$Var[X]=5.\frac{5}{6}.6^{2}$

Var[X] = 180

Expected Value and Variance of the number of times one must throw a die until 1 happens 5 times are 30 and 180, respectively.

4 0

3 years ago

On Tuesday the mailman delivers 3 checks for $5 each and 2 bills for each .if you had a starting balance of $25 , what is the en

ycow [4]

5x3=15 25+15=40 40-10=30

6 0

2 years ago

What is the measure of angle x, In degrees? Helps please!!

Mars2501 [29]

Because segments XY and XZ are of equal length, angle Y and angle Z must be congruent.

All inner angles must add to 180 degrees since it's a triangle.
70+70+x=180
140+x=180
x=40

Final answer: D

7 0

2 years ago

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Please help me with this.

Afina-wow [57]

Answer:

Step-by-step explanation:

7 0

2 years ago

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The function f(x) = 1.50x – 30 gives the amount of money Amelia has to spend each week for x school lunches, after taking money

Naya [18.7K]

To find the inverse, switch the x and y, and then solve for y (f(x) is the same as y)

So we get:
x=1.50y-30 (add 30 to both sides)
x+30=1.50y (divide both sides by 1.5)
x/1.5+30/1.5=y
y=x/1.5+20

Hope this helps

7 0

2 years ago

Which graph represents a system of equations with one solution?​

Which graph represents a system of equations with one solution?