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3 years ago

If a candy bar costs $0.75, how much would 4 candy bars cost?

Mathematics

2 answers:

Ganezh [65]3 years ago

8 0

Answer:

Step-by-step explanation:

0.75x4 = 3

jekas [21]3 years ago

5 0

The correct answer is $3. Please mark me brainiest. :)

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If 2x2 + y2 = 17 then evaluate the second derivative of y with respect to x when x = 2 and y = 3. Round your answer to 2 decimal

Vera_Pavlovna [14]

Answer:

y''=-1.26

Step-by-step explanation:

We are given that $2x^2+y^2=17$

We have evaluate the second order derivative of y w.r.t. x when x=2 and y=3.

Differentiate w.r.t x

Then , we get

$4x+2yy'=0$

$2x+yy'=0$

$yy'=-2x$

$y'=-\frac{2x}{y}$

Again differentiate w.r.t.x

Then , we get

$2+(y')^2+yy''=0$ $(u\cdot v)'=u'v+v'u)$

$2+(y')^2+yy''=0$

Using value of y'

$yy''=-2-(-\frac{2x}{y})^2$

$y''=-\frac{2+(-\frac{2x}{y})^2}{y}$

Substitute x=2 and y=3

Then, we get $y''=-\frac{2+(\frac{4}{3})^2}{3}$

$y''=-\frac{18+16}{9\times 3}=-\frac{34}{27}$

Hence,y''=-1.26

6 0

4 years ago

A sample space consists of 80 separate events that are equally likely. What is the probability of each? A sample space consists

yuradex [85]

Answer:

1/80

Step-by-step explanation:

7 0

3 years ago

What is the answer for 8=22x+1

elena-s [515]

Answer:

Step-by-step explanation:

22x + 1 = 8

Send 1 to the right side of the equation

22x = 8 - 1

22x = 7

Divide both sides by 22

x = 7/22

Hope this helps you

5 0

3 years ago

Read 2 more answers

PLZ HELP ?

ollegr [7]

I think it’s seventy five

5 0

3 years ago

Read 2 more answers

Wath the factorization of 8

kap26 [50]

Factorization of 8
= (2*2*2)

5 0

3 years ago