Answer:
b
Step-by-step explanation:
integer because is a negative number
Answer:
144
Step-by-step explanation:
Bec I’m just smart like that
Answer:
Step-by-step explanation:
<u>Simplify</u>
- 6√20 + 8√5 - 5√45 =
- 6√4(5) + 8√5 - 5√9(5) =
- 6(2)√5 + 8√5 - 5(3)√5 =
- (12 + 8 - 15)√5 =
- 5√5
Answer:
The student made a mistake in step 4
The length of the radius should be 6 cm
Step-by-step explanation:
Let us write each step to find the radius of a circle from its circumference
Step 1:
∵ C = 2πr
∵ C = 12π
Step 2:
Equate 12π by 2πr
∴ 12π = 2πr
Step 3:
Divide both sides by 2π
∵ 
Step 4:
∴ 6 = r
∴ The radius of the circle is 6 cm
The student mad a mistake he divided the left hand side by 2π and the right hand side by 2 only he left π with r
Step 4:
∴ 6 = πr
So he divided both sides again by π
Step 5:
∵ 
Step 7:
∴
= r
The student made a mistake in step 4
The length of the radius should be 6 cm
Answer:
a^2 - 9x^2y^2
Step-by-step explanation:
(−3xy + a)(3xy + a) =
= (a - 3xy)(a + 3xy)
This is the product of a sum and a difference: (a + b)(a - b) = a^2 - b^2
= a^2 - 9x^2y^2