The parabola :
x² = 20 y
It is in the standard form : x² = 4 b y
b = 20 : 4 = 5
Vertex : ( 0, 0 );
Focus : <span>( 0,</span> 5 );
Directrix : y + 5 = 0; y = - 5
Focal width: 4 * 5 = 20 units
Answer: A )
Answer:
170
Step-by-step explanation:
5/100 ×680
=34
20%=34what about 100%=?
(100×34)÷20
170
Answer:
2600
Step-by-step explanation:
2314 ÷ 89% = 2600
2314 is 89% of 2600.
<span><span><u>Answer
</u>
scale factor=0.4
</span><span><u>Explanation
</u>
</span><span>The scale factor for any transformation is the ration of the image distance to the object distance.
That is the ratio of distance from the origin to the image to the distance from the origin to the object.
In the case above, OR’is the image distance and OR is the object distance.
OR’ = √(〖1.2〗^2+〖3.6〗^2 )=√14.4=3.794733192
OR = √(3^2+9^2 )=√90=9.486832981
The scale factor = 3.794733192/9.486832981
=0.4
</span></span>
Equation for Liz:
L = 8n
Equation for Andy:
A = 8n + 35
Step-by-step explanation:
Let the no. of necklace be 'n'
Cost per necklace= $8
Equation for Liz:
L = 8n
Because Liz sells only necklace for $8 each
Equation for Andy:
A = 8n + 35
Because Andy sells each necklace for $8 and she sold the bracelets for $35