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Sliva [168]
2 years ago
15

SALE

Mathematics
1 answer:
RUDIKE [14]2 years ago
5 0

Answer:

$15

Step-by-step explanation:

60x75%

60x0.75

45

60-45=15

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The step function f of x is graphed what is the value of f of 0?​
zzz [600]

Answer:

AYYYYYYYYYYYY YO IS SNOOP DOGG

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
A dog jumps straight up. Y=-16t^2+20t models the motion of the dog, where "t" is the time in seconds and "y" is the height of th
alina1380 [7]

Answer:

Step-by-step explanation:

The motion of the dolphin is quadratic

i.e y=-16t²+20t

To get the maximum height the dolphin will reach

We need to find the point of inflexion. i.e dy/dt=0

dy/dt=-32t+20

Then set dy/dt=0

0=-32t+20

Then, -32t=-20

t=0.625

Let find d²y/dt²

d²y/dt²=-32. Since this is negative then the point t=0.625 is the maximum point the dolphin can reach

Then substitute t=0.625 into y

y=-16t²+20t

y=-16(0.625)²+20(0.625)

y=6.25ft

Then the maximum height the dolphin can reach is 6.25ft

Using discriminant

Formular method

y=-16t²+20t

So the dog height y<7

y=-16t²+20t <7

-16t²+20t-7<0

a=-16, b= 20. c=-7

t=(-b±√b²-4ac)/2a

Using the a, b and c direct for the discriminant

D=b²-4ac

D=20²-4×-16×-7

D=-48

Which is a complex number

Then the dolphin can reach the height

Then we need to model the D to be greater than 0

Therefore,

D>0

b²-4ac>0

We cannot do anything to a and b it is already given

a=-16, b=20

(20)²-4(-16c)>0

400+64c>0

64c>-400

Then

c>-6.25

Divide both side by - and the inequality sign will change

Therefore -c<6.25

So the dog height y<6.25

y=-16t²+20t <6.25

Therefore the maximum height is 6.25.

If it is greater than that then, we are going to have a complex root movement which is not possible for the dolphin .

5 0
3 years ago
12% of 72 is what number?
xxTIMURxx [149]
I hope this helps you ?.12%=72 ?.12=72.100 ?=6.100 ?=600
5 0
3 years ago
Chloe has $15 to spend on pencils. Each box of pencils costs $2. How many
Scorpion4ik [409]
Chloe can buy 7 pencil boxes and have 1 dollar left
3 0
3 years ago
Marcy is concerned that her findings may be due to an extraneous uncontrolled variable and not her treatment. Marcy is most conc
Westkost [7]

Answer:

c

Step-by-step explanation:

because it's her extraneous uncontrolled variable

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3 years ago
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