Answer:
i think its x= 0.75
Step-by-step explanation:
substitute:
8x × 5 = 40x
8x × 10 = 80x
8 × 5 = 40
5 × 10 =50
40x + 80x = 40 + 50
add like terms
so it'd be:
120x = 90
now divide 90 by 120 and that would give you the value of x alone which is 0.75
The answer is 8.4 so you would need 9 rolls of ribbon
A) -2
Explanation on pictures
For step 3 where it says Simplify the only thing it has is -2
Answer:
5x + 3
Step-by-step explanation:
We factor 25x^2 + 3x + 9.
25x^2 is a perfect square; 25x^2 = (5x)^2
9 is a perfect square; 9 = 3^2
This expression may be a perfect square trinomial.
25x^2 + 30x + 9 = (5x + 3)^2
We check the middle term: 2ab = 2 * 5 * 3 = 30
The coefficient, 30, is correct, so we are dealing with a perfect square trinomial.
length = 5x + 3
Since coefficient of x^2 is prime and both second and third term are positive, it must be in form (3x+_)(x+_).
There is three possibles for these blank spaces;
1,4
2,2
4,1
Because coefficient of second term is 13 = 1+12 = 1+3*4, these blank space should be 1,4
So your answer is (3x+1)(x+4)
Hope this makes sense.
