10.8. Multiply 6 by 9/5. Put the fractions into decimals and they both turn out to be 1.8.
5a - (-2a) + 9
When you subtract a negative number, you can replace the 'double negative' with a positive, or addition. So, instead of subtracting -2a, you can add 2a.
5a + 2a + 9 Combine like-terms
7a + 9
Answer: 16.
Step-by-step explanation:
All angles in any pentagon add up to 540 degrees.
As such, you can represent each angle in an equation in which the sum of all the angles is 540, as follows:
As an expression, it would be:
3 - 1/13w (or you could also do 1/13w - 3).
Answer:
A) 2x3 + 11x2 + 8x - 16.
Step-by-step explanation:
s(x).t(x) = (x + 4)( 2x2 + 3x - 4)
= x(2x2 + 3x - 4) + 4( 2x2 + 3x - 4)
= 2x3 + 3x2 - 4x + 8x2 + 12x - 16
= 2x3 + 11x2 + 8x - 16
