Answer:
x=7
Step-by-step explanation:
-6x-14=-8x
-6x+8x=14
2x=14
x=7
Answer:
Step-by-step explanation:
5.(a)
x²+6x-15=0

(b)
4x²-8x-1=0

A the answer is 1296 but 756 is squared so it is A ok thats easy i did that in 7th grade finally something i can do
Answer:
49
Step-by-step explanation:
The ratio of three numbers = 2:5:7
Then the numbers are 2x,5x and 7x
Given that the LCM of these numbers = 490
LCM of 2x,5x,7x is 2×5×7×x = 70x
Then, we have 70x = 490
x = 7
Hence, the numbers are 14, 35 and 49
Largest number = 49
∴The square root of the largest number = 7