Question

I’m really confused please help me

Answer 1

Answer:

$\frac{9}{2}$

or

$4.5$

depending if you want a decimal number or a fraction

Step-by-step explanation:

start replacing based on what you're given:

$s = (10)( \frac{1}{2} ) + ( - 2)( \frac{1}{2} ) ^{2}$

at this point is just crunching numbers:

$s = 5 - \frac{1}{2} = \frac{9}{2} = 4.5$

Answer 2

Answer:

$s=\dfrac{19}{4}$

Step-by-step explanation:

Given:

• $u = 10$
• $a = -2$
• $t = \dfrac{1}{2}$

Substitute the given values into the given formula and solve for s:

$\implies s=ut+\dfrac{1}{2}at^2$

$\implies s=(10)\left(\dfrac{1}{2}\right)+\dfrac{1}{2}(-2)\left(\dfrac{1}{2}\right)^2$

$\implies s=\dfrac{10}{2}-\dfrac{2}{2}\left(\dfrac{1}{4}\right)$

$\implies s=5-\dfrac{1}{4}$

$\implies s=\dfrac{20}{4}-\dfrac{1}{4}$

$\implies s=\dfrac{19}{4}$

Solution

$\textsf{Improper fraction}: \quad s=\dfrac{19}{4}$

$\textsf{Mixed number}: \quad s=4\frac{3}{4}$

$\textsf{Decimal}: \quad s=4.75$