Answer:
Step-by-step explanation:
-5(2k+4)+1=13-6k
Expanding the brackets.
-10k-20+1=13-6k
-10k-19=13-6k
Adding 6k and 19 on both sides.
-10k+6k=13+19
-4k=32
Divide both sides by -4.
k = -8
Answer:
3/2 * square root of 2
This is the correct answer
Step-by-step explanation:
3/14 * square root 98 =
= square root of 98 * 3/14^2 =
= square root of 98 * 9/196 =
= square root of 9/2
3/2 * square root of 2 =
= square root of 2 * 9/4 =
= square root of 9/2
square root of 9/2 = square root of 9/2
Answer:
8k
Step-by-step explanation:
if you multiply a number and a variable then they combine to make the equation the answer rather than a single number so your answer would be 8k
The area of the circle = π r² = π (d/2)²
Where r is the radius of the circle
And d is the diameter of the circle
d = 2r OR r = d/2
given d = 10 in ∴ r = d/2 = 10/2 = 5 in
∴ The area of the circle = π r² = π * 5² = 25π ≈ 78.54 in²
The correct answer is the fourth option 78.54
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very important note:
There is a mistake in the dimension of the answers.
The dimension of the given diameter is inch , while the dimensions of the answers is square cm.
If it is required to find the area in square cm
∵ 1 inch = 2.54 cm
∴ r = d/2 = 10/2 = 5 in = 5 * 2.54 cm = 12.7 cm
∴ Area = π r² = π * (12.7)² = 161.29π ≈ 506.7 square cm
