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3 years ago

3.

Mathematics

2 answers:

Klio2033 [76]3 years ago

8 0

Answer:

Step-by-step explanation:

green apples=8×3

=24

apples bought=24+8

=35 apples

alexgriva [62]3 years ago

4 0

Let the number of green apples and red apples be 8x and 3x respectively.

Given: 8x-3x =35

=> 5x =35 => x=7

Hence there are 8x=56 green apples and 3x=21 red apples.Ans.

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What is 18/30 in simplest form

charle [14.2K]

18/30 divided by 6 simplifies to 3/5. Simplest form = 3/5

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3 years ago

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Let z = ln(x 2 + y), x = ret . and y = ter . Use the Chain Rule to compute ∂z ∂r and ∂z ∂t at the point where (r, t) = (1, 2).\

Natali [406]

By the chain rule,

$\dfrac{\partial z}{\partial u}=\dfrac{\partial z}{\partial x}\dfrac{\partial x}{\partial u}+\dfrac{\partial z}{\partial y}\dfrac{\partial y}{\partial u}$

where $u\in\{r,t\}$ .

We have component partial derivatives

$\dfrac{\partial z}{\partial x}=\dfrac{2x}{x^2+y}=\dfrac{2re^t}{r^2e^{2t}+te^r}$

$\dfrac{\partial z}{\partial y}=\dfrac1{x^2+y}=\dfrac1{r^2e^{2t}+te^r}$

$\dfrac{\partial x}{\partial r}=e^t$

$\dfrac{\partial x}{\partial t}=re^t$

$\dfrac{\partial y}{\partial r}=te^r$

$\dfrac{\partial y}{\partial t}=e^r$

Putting the appropriate pieces together and setting $(r,t)=(1,2)$ , we get

$\dfrac{\partial z}{\partial r}(1,2)=\dfrac{2e^3+2}{e^3+2}$

$\dfrac{\partial z}{\partial t}(1,2)=\dfrac{2e^3+1}{e^3+2}$

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3 years ago

Determine whether the graph shows a positive correlation, a negative correlation, or no correlation. If there is a positive or n

Aleks [24]

Answer:

Step-by-step explanation:

In a busy amusement park the number of people entering always increases as time goes on. I’m sure you know this if you ever been to one and had to wait in those long lines at the entrance or at any of the rides.

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3 years ago

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. Solve the system of equations using substitution. 3y = –x + 2 y = –x + 9 (3, 6) (20, –4) (–1, 8) (10, –1)

fiasKO [112]

Answer:

when x=25/2 and y= -7/2

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4 years ago

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Need help with this question please

zubka84 [21]

We can use the two point form to find the answer:
$y1 - y2 = m(x1 - x2)$
Where y1 is the y coordinate(coordinate on the right hand side of (-9)) of the of the first coordinates, and y2 is the y coordinates of the second coordinates given (0).

While x1(-9) and x2(-6) are the x-coordinates(left hand side of the coordinates) of the coordinates given seperately.

m is the slope of the two points, and the formula is:
$\frac{y1 - y2}{x1 - x2}$
In this case:
$\frac{ - 9 - ( 0)}{ - 9 - (-6)} \\ = \frac{ - 9 }{ - 9 + 6 } \\ = \frac{ - 9}{ -3 } \\ = 3$

We can then proceed to find the eqaution by putting *one* of the points into the two-point formula.

Put (-6，0) into the formula:
-0-y = 3(-6-x)
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Therefore the answer is y= 18+3x.

Hope it helps!

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4 years ago