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12345 [234]
2 years ago
13

Determine the solution and indicate the restrictions on the variable.

Mathematics
1 answer:
cupoosta [38]2 years ago
5 0

Answer:

B

Step-by-step explanation:

Subtract 20 from both sides:

-\sqrt{9-8x} =-15

Divide both sides by -1:

\sqrt{9-8x} =15

Square both sides:

9-8x=255

Subtract 9 by both sides:

-8x=216

Divide both sides by -8:

x=-27

That means that either a or b is correct and since 9/8 is positive that means it needs to bee less than 9/8 so the correct answer is B

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Which of the following sets of numbers could represent the three sides of a right triangle?
NARA [144]

Answer:

16,30.34

Step-by-step explanation:

7 0
3 years ago
Write an equation in standard form that is parallel to the line y = 2x - 1 that passes through the point (1, 2). 2x - y = 0 O x
timofeeve [1]

Answer:

2x - y = 0

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = 2x - 1 ← is in slope- intercept form

with slope m = 2

Parallel lines have equal slopes, thus

y = 2x + c ← is the partial equation

To find c substitute (1, 2) into the partial equation

2 = 2 + c ⇒ c = 2 - 2 = 0

y = 2x ← equation in slope- intercept form

Subtract y from both sides

0 = 2x - y , that is

2x - y = 0 ← equation in standard form

5 0
3 years ago
PLEASE HELP!!!! WILL GIVE BARAINLYIST!!!!
Klio2033 [76]

Experimental probability = 1/5

Theoretical probability = 1/4

note: 1/5 = 0.2 and 1/4 = 0.25

=============================================

How I got those values:

We have 12 hearts out of 60 cards total in our simulation or experiment. So 12/60 = (12*1)/(12*5) = 1/5 is the experimental probability. In the simulation, 1 in 5 cards were a heart.

Theoretically it should be 1 in 4, or 1/4, since we have 13 hearts out of 52 total leading to 13/52 = (13*1)/(13*4) = 1/4. This makes sense because there are four suits and each suit is equally likely.

The experimental probability and theoretical probability values are not likely to line up perfectly. However they should be fairly close assuming that you're working with a fair standard deck. The more simulations you perform, the closer the experimental probability is likely to approach the theoretical one.

For example, let's say you flip a coin 20 times and get 8 heads. We see that 8/20 = 0.40 is close to 0.50 which is the theoretical probability of getting heads. If you flip that same coin 100 times and get 46 heads, then 46/100 = 0.46 is the experimental probability which is close to 0.50, and that probability is likely to get closer if you flipped it say 1000 times or 10000 times.

In short, the experimental probability is what you observe when you do the experiment (or simulation). So it's actually pulling the cards out and writing down your results. Contrast with a theoretical probability is where you guess beforehand what the result might be based on assumptions. One such assumption being each card is equally likely.

7 0
3 years ago
Help please I really really need this is my last question help hurry
den301095 [7]
1/6 is the answer. Good luck!
4 0
3 years ago
PLEASE HELP ME FAST!!!!!!!<br> who do i write the number 0.23333333333... repeating as a fraction?
PSYCHO15rus [73]
It is 23/100 just say it and then write it
3 0
3 years ago
Read 2 more answers
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