the second choice, and the last choice are correct.
the first one, x can be any number.
the second one, x can be any number but not -1(the denominator cannot be 0)
the third one, x has to be ≥ 1/2, because 2x-1 cannot be negative.
the fourth one, x can be any number but not -1 or -4
the last one, x can be any number but not -3
Answer:
7/3
1
1/2
undefined
Step-by-step explanation:
1/1 ÷ 3/7 = 7/3 because you multiply the 1st fraction by the reciprocal of the 2nd
1/1 = 1
1/2 = 1/2
1/0 = undefined; anything divided by zero is considered to be undefined
Answer:
7. A = π
8. A = 6.25π
9. A = 16π
Step-by-step explanation:
When you have a bunch of similar problems that all use the same formula, it is usually convenient to solve the problem in generic terms, then put in the specific numbers.
You are asked to find A, and you are given the formula ...
To rewrite this as an equation for A, you divide by its coefficient, 4π.
If you like, you can go one step further, replacing C with kπ. Now, you have ...
__
7. k=2, A=(2^2)/4·π
A = π
__
8. k=5, A=(5^2)/4·π
A = (25/4)π
A = 6.25π
__
9. k=8, A=(8^2)/4·π
A = 16π
Answer:
<c =60
Step-by-step explanation:
The angles of a triangle need to add up to 180 degrees. if you subtract 40 and 80 from 180 you will come up with the answer 60
To find the area of the figure,we nees to first find the length of AC and BC by sine formula:
The length of AC:
24/sin90°=AC/sin45°
AC=24/sin90° x sin45°
AC=16.9705..
AC≈16.97ft
<BAC=180°-90°-45°=45°
As there are two same angles,it is an isosceles triangle,thus BC=AC≈16.97ft
The area:
16.97×16.97/2
=143.99...
≈144 sq.ft
Therefore, the answer is 144sq.ft
Hope it helps!