Solve x2 – 2x = 15 by applying the quadratic formula.
1 answer:
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Answer:
- Option B
Step-by-step explanation:
Given Equation :
Using distribute property:
Adding the like terms we get :
Transposing the variables on the right side and constant terms on the left side :
Dividing both sides by 5 :
Answer:
15 dozens of cakes
Step-by-step explanation:
It is given that Jeanna is making cupcakes for her family and she normally makes 2 dozens of red velvet cakes and 3 dozens of gingerbread spice cakes. But as everybody is staying at home, Jeanna wants to increase the standard amount by 3 for enough cakes.
So,
2 dozens of velvet cakes, i.e.
2 x 12 = 24 red velvet cakes
Increasing this amount by 3 times will give us 24 x 3 = 72 red velvet cakes.
Similarly,
3 dozens of gingerbread spice cakes, i.e.
3 x 12 = 36 gingerbread spice cakes
Increasing this amount by 3 times will give us 36 x 3 = 108 gingerbread spice cakes.
Therefore the total number of cakes is = 72 + 108
= 180 cakes.
We know 1 dozen = 12
Therefore dividing 180 cakes by 12, we get
= 15 dozen cakes.
Therefore, now Jeanna will have to make 15 dozens of cupcakes for all.