Basic Math Examples

$7 {(9.9)}^{2} + 13 - 9$ , $0.9$

Step 1

Simplify each term.

Tap for more steps...

Step 1.1

Raise $9.9$ to the power of $2$ .

$7 \cdot 98.01 + 13 - 9, 0.9$

Step 1.2

Multiply $7$ by $98.01$ .

$686.07 + 13 - 9, 0.9$

Step 2

Simplify by adding and subtracting.

Tap for more steps...

Step 2.1

Add $686.07$ and $13$ .

$699.07 - 9, 0.9$

Step 2.2

Subtract $9$ from $699.07$ .

$690.07, 0.9$

Step 3

The mean of a set of numbers is the sum divided by the number of terms.

$\frac{690.07 + 0.9}{2}$

Step 4

Add $690.07$ and $0.9$ .

$\frac{690.97}{2}$

Step 5

Divide $690.97$ by $2$ .

$345.485$

Step 6

The mean should be rounded to one more decimal place than the original data. If the original data were mixed, round to one decimal place more than the least precise.

$345.49$