I already flipped the coins but i don't understand the rest

Instructions
For this activity, you will need two coins. First, you will determine the theoretical probability of events. Then, you will flip the coins 100 times and determine the experimental probability of the events.
Flip two coins 100 times, and record the results of each coin toss in a table like the one below:
Result
Frequency
Two heads
26
Two tails
25
One head, one tail
49
Answer the following questions based on the data you gathered. You must show your work to receive credit.
1 What is the theoretical probability that a coin toss results in two heads showing?

2 What is the experimental probability that a coin toss results in two heads showing?

3 What is the theoretical probability that a coin toss results in two tails showing?

4 What is the experimental probability that a coin toss results in two tails showing?

5 What is the theoretical probability that a coin toss results in one head and one tail showing?

6 What is the experimental probability that a coin toss results in one head and one tail showing?

7 Compare the theoretical probabilities to your experimental probabilities. Why might there be a difference?

Step-by-step explanation:

Theoretical probability is the probability we expect or calculate.

Experimental probability is the probability we measure or observe.

1. The theoretical probability of two heads showing is:

P(2 heads) = P(head) × P(head)

P(2 heads) = 0.5 × 0.5

P(2 heads) = 0.25

2. The experimental probability of two heads showing is:

P(2 heads) = 26 / 100

P(2 heads) = 0.26

3. The theoretical probability of two tails showing is:

P(2 tails) = P(tail) × P(tail)

P(2 tails) = 0.5 × 0.5

P(2 tails) = 0.25

4. The experimental probability of two tails showing is:

P(2 tails) = 25 / 100

P(2 tails) = 0.25

5. The theoretical probability of one head and one tail is:

P(head and tail) = P(head, then tail) + P(tail, then head)

P(head and tail) = 0.5 × 0.5 + 0.5 × 0.5

P(head and tail) = 0.25 + 0.25

P(head and tail) = 0.5

6. The experimental probability of one head and one tail is:

P(head and tail) = 49 / 100

P(head and tail) = 0.49

7. The differences between the theoretical and experimental probabilities may simply be because there's a finite number of coin tosses, and each coin toss is independent of each other.

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15