Brainliest & points asap ! ( i need someone to check the answers for me or hep me with the right one ) solve by using the quadratic formula. 8. x^2 + 7x -3= 0x= 7.40 and x=0.40 9. 5x^2 -8x -4=0 x=1.49 and x=0.11 10. 3x^2 + x -1= 0 x= -2 and x= 1.67

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870

6 equilateral triangles