Answer:
4 packages
Step-by-step explanation:
Hi,
1.25x + 6.50 = 11.50
1.25x = 5
x = 4
He bought 4 packages.
I hope this helps :)
Here, p^ = (0.39 + 0.47)/2 = 0.43
The given interval is (0.43 - 0.04, 0.43 + 0.04).
Therefore, the margin of error is 0.04.
Answer:
1. C 2. A 3. B
Step-by-step explanation:
Step 1: 12x - 6 = 10 divided by 2 is 6x - 3 = 5
Step 2: When you add three to the left side of the equation the negative 3and positive 3 cancel out and when you add three to the right side of the equation 5 + 3 = 8
Step 3: multiplying both sides by 1/6. 1/6 is the reciprocal of 6 so they cancel out. 1/6 times 8 is 8/6 which condenses to 4/3 in simple terms.
Answer:go there and it will answer your question
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Step-by-step explanation:
Answer:
see explanation
Step-by-step explanation:
Given matrix A = , then
detA = ad - bc
Given
A =
detA = 5a - (a + 1) = 5a - a - 1 = 4a - 1
and
4a - 1 = 7 ( add 1 to both sides )
4a = 8 ( divide both sides by 4 )
a = 2
Thus
A =
A² - 7A + 7I
A² =
= =
7A= 7 = =
7I = 7 =
Thus
- +
= =
Hence
7A² - 7A + 7I = 0