Answer:
No, because 3 x 7 = 21 - 4 = 17
Step-by-step explanation:
Answer:
RM = 12 cm
Step-by-step explanation:

Assuming 20 is the hypotenuse cus there is no picture:




If It's not the hypotenuse:




But I find it unlikely that 20 wasn't the hypotenuse so ignore that unless it applies.
Hope this helped. :0)
Answer: 
<u>Step-by-step explanation:</u>
1st marble and 2nd marble

Next time, please share the answer choices.
Starting from scratch, it's possible to find the roots:
<span>4x^2=x^3+2x should be rearranged in descending order by powers of x:
x^3 - 4x^2 + 2x = 0. Factoring out x: </span>x(x^2 - 4x + 2) = 0
Clearly, one root is 0. We must now find the roots of (x^2 - 4x + 2):
Here we could learn a lot by graphing. The graph of y = x^2 - 4x + 2 never touches the x-axis, which tells us that (x^2 - 4x + 2) = 0 has no real roots other than x=0. You could also apply the quadratic formula here; if you do, you'll find that the discriminant is negative, meaning that you have two complex, unequal roots.