Answer:
16x² - 49
Explanation:
To answer this question, we will multiply each term from the first bracket by each term from the second bracket and then combine like terms to get the final expression.
This can be done as follows:
(4x - 7)(4x + 7)
4x(4x) + 4x(7) - 7(4x) - 7(7)
16x² + 28x - 28x - 49
16x² - 49
Another easier way to solve this is to note that the given brackets can be solved using the difference between two squares.
The rule can be stated as follows:
(a + b)(a - b) = a² - b²
Comparing this to the given brackets, we will find that:
(4x + 7)(4x - 7) = (4x)² - (7)² = 16x² - 49
Hope this helps :)
Answer:
slope = m = 1
Step-by-step explanation:
y = x + 5
slope intercept form is y = mx + b, where m is the slope.
in this case, the m = 1; therefore, the slope is 1
Answer:
A 8 hours
Step-by-step explanation:
Last week she baby sat 12 hours.
This week she baby sat x hours.
Last week she baby sat 1 1/2 times as many hours as this week.
12 = 1 1/2 × this week
12 = 1 1/2 × x
1.5x = 12
x = 12/1.5
x = 8
Answer:
A 8 hours
Answer:
it is not true
Step-by-step explanation:
The correct answer should be A, at positive 3 , and D , at positive 3
