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Arisa [49]
3 years ago
7

Ciara buys 7 lb of strawberries for $5.81. How much would she spend if she wanted 15 lb of strawberries?

Mathematics
2 answers:
wlad13 [49]3 years ago
8 0

by multiplication of 15 and 5.81 answer is the

87.15

krok68 [10]3 years ago
5 0

Answer:

i got 0.125

Step-by-step explanation:

I know you have to divide 5.81 by 7 to find the unit then divide that by 15

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Please help!!!!!!!!!!!!!!!!!!!!!
dalvyx [7]
30,12,6,6,36 there you go
8 0
4 years ago
Consider the parabola r​(t)equalsleft angle at squared plus 1 comma t right angle​, for minusinfinityless thantless thaninfinity
kodGreya [7K]

Given:-   r(t)=< at^2+1,t>  ; -\infty < t< \infty , where a is any positive real number.

Consider the helix parabolic equation :  

                                              r(t)=< at^2+1,t>

now, take the derivatives we get;

                                            r{}'(t)=

As, we know that two vectors are orthogonal if their dot product is zero.

Here,  r(t) and r{}'(t)  are orthogonal i.e,   r\cdot r{}'=0

Therefore, we have ,

                                  < at^2+1,t>\cdot < 2at,1>=0

< at^2+1,t>\cdot < 2at,1>=

                                              =2a^2t^3+2at+t

2a^2t^3+2at+t=0

take t common in above equation we get,

t\cdot \left (2a^2t^2+2a+1\right )=0

⇒t=0 or 2a^2t^2+2a+1=0

To find the solution for t;

take 2a^2t^2+2a+1=0

The numberD = b^2 -4ac determined from the coefficients of the equation ax^2 + bx + c = 0.

The determinant D=0-4(2a^2)(2a+1)=-8a^2\cdot(2a+1)

Since, for any positive value of a determinant is negative.

Therefore, there is no solution.

The only solution, we have t=0.

Hence, we have only one points on the parabola  r(t)=< at^2+1,t> i.e <1,0>




                                               




6 0
3 years ago
kylie has $70 to spend on clothes. she wants to buy a pair of jeans for $ 30 and spend the rest on t-shirts. each t-shirt cost $
lbvjy [14]
Kylie can purchase 32 T-shirt
6 0
3 years ago
Simply the expression 3(2x+y)
Damm [24]

Answer:

6x + 3y

Step-by-step explanation:

3(2x + y)

6x + 3y

Bet of Luck!

4 0
3 years ago
Help please thank you
LenaWriter [7]

Answer:

B)60m^2

Step-by-step explanation:

The area of the rectangle is 40m^2 and the area of the triangle is 20m^2. So 40+20 is 60.

3 0
3 years ago
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