Answer:
35
Step-by-step explanation:
You have to work backwards, you find what 25-18 is (7)
7 is a fifth of the number you are looking for
so all you have to do is 7 x 5 and you get 35
<span>x in (-oo:+oo)</span><span>
(1/3)*((6/5)*x-3) = 0</span><span>
1/3*(6/5*x-3) = 0</span><span>
( 1/3 )</span><span>
1/3 = 0</span><span>
x belongs to the empty set</span><span>
( 6/5*x-3 )</span><span>
6/5*x-3 = 0 // + 3</span><span>
6/5*x = 3 // : 6/5</span><span>
x = 3/6/5</span><span>
x = 5/2</span><span>
x = 5/2</span>
Answer:
144
Step-by-step explanation:
Here's the key:
Any radius that's perpendicular to a chord, bisects the chord.
So the piece of a radius that's perpendicular to the chord bisects it,
and the part of the chord that forms a side of the triangle is also 6.5 .
The triangle is a right triangle, and its hypotenuse is a radius of the circle.
the diameter of the circle is 16, so the length of the radius is 8 .
So now you know the length of the hypotenuse and one leg of a right
triangle, and side 'x' is the other leg.
This is where Pythagoras comes in.
(hypotenuse)² = (one leg)² + (the other leg)²
(8)² = (6.5)² + x²
64 = 42.25 + x²
x² = 64 - 42.25
x² = √21.75
x = about 4.664... (looks like choice-A)
7/8(x-1/2)=-49/80
70/80(x-40/80)=-49/80 make all common denominator
x-40/80=-56/80 divide -49/80 by 70/80 to isolate parentheses
x=16/80 or 1/5 add 40/80 to isolate x
I'm not sure if my answer right because I was rushing but if you follow what I wrote next to the lines you should get the right answer
