Help!! Solve please?!

k=10 or k=−10

Step-by-step explanation:

Let's solve your equation step-by-step.

(

4

5

k)(k)−5=75

Step 1: Simplify both sides of the equation.

4

5

k2−5=75

Step 2: Add 5 to both sides.

4

5

k2−5+5=75+5

4

5

k2=80

Step 3: Divide both sides by 4/5.

4

5

k2

4

5

=

80

4

5

k2=100

Step 4: Take square root.

k=±√100

k=10 or k=−10

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.