Answer:
<u>x = √13 - 3</u>
<u>x = -√13 - 3</u>
Step-by-step explanation:
Given :
Solving :
- x² + 6x + 9 - 9 - 4 = 0 [Adding and subtracting 9]
- (x + 3)² - 13 = 0 [Group the square term together]
- (x + 3)² -13 + 13 = 0 + 13 [Add 13 on both sides]
- √(x + 3)² = √13 [Taking square root on both sides]
- x + 3 - 3 = ±√13 - 3 [Subtract 3 from both sides]
- x = ±√13 - 3
Solutions :
- <u>x = √13 - 3</u>
- <u>x = -√13 - 3</u>
24 minutes
susan will end 6 laps in 24 minutes while daphne will end 4 laps in 24 minutes
susan: 6, 12, 18, 24
daphne: 4, 8, 12, 16, 20, 24
hope this helped!
Answer:
The probability of selecting a black card or a 6 = 7/13
Step-by-step explanation:
In this question we have given two events. When two events can not occur at the same time,it is known as mutually exclusive event.
According to the question we need to find out the probability of black card or 6. So we can write it as:
P(black card or 6):
The probability of selecting a black card = 26/52
The probability of selecting a 6 = 4/52
And the probability of selecting both = 2/52.
So we will apply the formula of compound probability:
P(black card or 6)=P(black card)+P(6)-P(black card and 6)
Now substitute the values:
P(black card or 6)= 26/52+4/52-2/52
P(black card or 6)=26+4-2/52
P(black card or 6)=30-2/52
P(black card or 6)=28/52
P(black card or 6)=7/13.
Hence the probability of selecting a black card or a 6 = 7/13 ....
Answer:
its answer is c.(16 , 15)
Step-by-step explanation:
Answer:
0.6
Step-by-step explanation:
Using place value, the first digit after a decimal point is the tenths unit, so it is written as 0.6