2/10 is 0.2. This is 0.2 x 10^1 in scientific notation.
The answer is in the image. If you convert them to improper fractions, the division is easier. Like 2/3 + 1 = 5/3
-8≥-5x+2>-38
-10≥-5x>-40
2≤x<8 (when divided by a negative number, the sign changes from ≥ or > to ≤ or <)
so x is between 2 (include 2, a solid dot) and 8 (doesn't include 8, a hollow bubble)
the third choice is correct.
D. Slope: -2, Y-Intercept: (0,5), you can get this answer using the equation y=mx+b. m=slope, b=y-intercept.
There are 6C3 = 20 such combinations.
abc, abd, abe, abf
acd, ace, acf, ade
adf, aef, bcd, bce
bcf, bde, bdf, bef
cde, cdf, cef, def
