Answer:
(3w - 7)(3w + 7)
Step-by-step explanation:
The expression is a difference of squares and factors in general as
a² - b² = (a - b)(a + b)
Thus
9w² - 49
= (3w)² - 7²
= (3w - 7)(3w + 7)
You have to distribute the 7 so the final answer will be -49-42x
Answer:
if you’re looking for b, then its 4
Step-by-step explanation:
4. x = 1/2 and y = 3
5. x = −5/7 and y = 16/7
6. No solutions.
7. x = 7 and y = 4
8. ( You already got that one but just in case ) No solutions.
9. x = 3/2 and y = 3
10. x = 1/5 and y = 0
11. x = 3 and y = −8/5
12. x = −48 and y = −45
13. x = 92/15 and y = 29/15
14. x = −38/3 and y = 21
Answer:
first one x = 26
second one x = 11.12
Step-by-step explanation:
a^2 + b^2 = c^2
24^2 + 10^2 = c^2
676 = c^2
26 = c
a^2 = c^2 - b^2
a^2 = 12^2 - 4.5^2
a^2 = 123.75
a = 11.12