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Svet_ta [14]
3 years ago
12

Ying Ying wants to buy some petunias.

Mathematics
1 answer:
Crazy boy [7]3 years ago
5 0
2 petunias leave $6.50 on her wallet, and 8 leave $5.00. This means that 6 petunias cost $1.50, and that 1 petunia costs 25 cents.

.25 goes into 3.50 (the amount of money she has left in her wallet after buying 14 petunias) 14 times. 14 + 14 =28.

Ying Ying can buy 28 petunias at most.
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Where does the normal line to the parabola y = x − x2 at the point (1, 0) intersect the parabola a second time?
Ksivusya [100]
Find the line that is normal to the parabola at the given point
remember that normal means perpendicular
perpendicular lines have slopes that multiply to -1
we can use point slope form to write the equation of the line since we are given the point (1,0)

we just need the slope

take derivitive
y'=1-2x
at x=1
y'=1-2(1)
y'=1-2
y'=-1

the slope is -1
the perpendicular of that slope is what number we can multiply to get -1
-1 times what=-1?
what=1
duh
so
point (1,0) and slope 1
y-0=1(x-1)
y=x-1 is da equation

solve for where y=x-1 and y=x-x² intersect

set equatl to each other since equal y
x-1=x-x²
x²-1=0
factor difference of 2 perfect squares
(x-1)(x+1)=0
set to zero

x-1=0
x=1
we got this point already

x+1=0
x=-1
sub back
y=-1-(-1)²
y=-1-(1)
y=-1-1
y=-2

it intersects at (-1,-2)
7 0
3 years ago
William and his puppy Rover are out for a morning jog at a comfortable pace of 10 minutes per mile. If they keep up this pace fo
mojhsa [17]

Answer:

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Step-by-step explanation:

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8 0
2 years ago
the instructions for a science experiment call for 227 mg of water, if you subtract this from a gram how many milligrams would b
kirza4 [7]

Answer:

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Step-by-step explanation:

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3 0
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Need help what would the depth be after 30 minutes
avanturin [10]

Answer:

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Step-by-step explanation:

Put 30 where x is and do the arithmetic.

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The trend line predicts the depth to be 108.7 ft after 30 minutes.

_____

<em>Comment on this problem</em>

Real-world considerations in scuba diving may cause the diver to level off or head toward the surface before 30 minutes elapse. The trend line does not model these effects.

8 0
3 years ago
Consider the graph of the polynomial function p(x)=(x-1)(x-2)(x+5)
Bas_tet [7]
It's decreasing to the left and increasing to the right
4 0
2 years ago
Read 2 more answers
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