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AleksAgata [21]
3 years ago
15

X2y–y+xy2–x for x=4 and y=0.25Im Giving 15 pts! thanks!

Mathematics
1 answer:
Monica [59]3 years ago
3 0
(4^2)(0.25)-0.25+4(0.25^2)-4
=0
hope this helps!
You might be interested in
Can someone help me with these questions
Varvara68 [4.7K]

Answer:

1.) can not be found

2.)V=11403.98

3.)

Step-by-step explanation:

volume = π r×r × H

r = Radius

H = height

π = 3.14

the first one does not have a radius so therefore we can NOT find the volume

the second one is π×(11×11) ×30 =11403.98

the 3rd one is π× (10×10) ×5 =1570.79

hope this helped

5 0
3 years ago
(15) ? Is this correct or am I missing something, thanks :)
svetoff [14.1K]
You are correct!

Step 1:Write what you know
Madeline's Height: 6 ftMadeline's Shadow: 108 in
Friend's Height: X (we use X as a variable because his height is unknown)Friend's Shadow: 108 in - 1.5 ft                              108 in - 18 in                                 90 in
Step 2:Set up proportions
6          x----- = -----108      90 
Step 3:Cross Multiply & Solve
108x = 540x = 5 ft tall

4 0
3 years ago
Rachel drove 756 miles in 12 hours.<br> At the same rate, how many miles would she drive in 8 hours?
kvv77 [185]

Answer:

504 miles

Step-by-step explanation:

you would do 756÷12 which equals 63.... For every hour that you drive its 63 miles. Then you do 63×8 to get 504

4 0
3 years ago
Enrollment is the ski/snowboard club increase by 30 percent this year. there are now 182 students in this club how many students
lbvjy [14]
127 students were in the club last year
7 0
3 years ago
A potential energy function is given by U = A x3 + B x2 − C x + D . For positive parameters A, B, C, D this potential has two eq
Ivenika [448]

Answer:

7.8655

Step-by-step explanation:

Given the functionl

U=Ax^3+Bx^2-cx+D

Where,

A=1.45J/m^3\\B=2.85J/m^2\\c= 1.7J/m\\D=0.6J

We have, replacing,

U=1.45x^3+2.85x^2-1.7x+0.6

We need to derivate and verify for stable equilibrum that,

\frac{d^2 U}{dx^2}>0

Then,

U'(x) = 4.32x^2+5.7x-1.7

Roots in,

x_1=-1.57008\\x_2=0.250636

We obtain U"(x), then we have

\frac{d^2U}{dx}=8.64x+5.7

For x=-1.57, U"(x)=-7.86549 Unestable

For x=0.250636 U"(x)=7.8655>0 Stable

7 0
3 years ago
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