3 x^{2} - 15x - 42
(x-7)(x+2)
x-7=0 x+2=0
x=7,-2
Answer:
0
Step-by-step explanation:
We can write the equation in a simpler form so it doesn't look like a mess of numbers:

Because we are just adding three terms together and then subtracting those exact terms, we have the answer as 0.
I’m not sure about this question
Answer:
A
Step-by-step explanation:
The area for a parallelogram is given by the formula:

Where b is the base length and h is the vertical height.
The base length is 6 and the height is 10 (if you flip the figure 90 degrees). So:

Multiply:

Our answer is A.
And we're done!
The answer to the problem is D
35 : 15 is the same as 7 : 3