Can someone help me with this excercises plz:

Either

9

+

(

k

−

17

)

or

(

9

+

k

)

−

17

depending upon what you meant by

"sum of 9 and k minus 17"

(the resultant value would be the same, but the expression would be different).

Step-by-step explanation:

d 600 because 15*10*2=300

300+300=600

step-by-step explanation:

18 units²

step-by-step explanation:

first let's find altitude bd using the distance formula

d = √((y₂ - y₁)² + (x₂ - x₁)²)

bd = √((0 - -3)² + (0 - 3)²)

bd = √18

given the placement of points a and c, we can denote that point d bisects segment ac.

we will call ac the base.

using the distance formula

ac = √((0 - 6)² + (-6 - 0)²)

ac = √72

knowing our base and our height, we can plug these into our triangle area formula

area = (b * h)/2

area = (√18 * √72) / 2

area = (√1296) / 2

area = 36 / 2

area = 18 units²