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3 years ago

Help me with this plz asap

Mathematics

2 answers:

FromTheMoon [43]3 years ago

7 0

It’s R that will be your answer.

scoray [572]3 years ago

3 0

Answer:

Step-by-step explanation:

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This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive an

sleet_krkn [62]

Answer:

-6re−r [sin(6θ) - cos(6θ)]

Step-by-step explanation:

the Jacobian is ∂(x, y) /∂(r, θ) = δx/δθ × δy/δr - δx/δr × δy/δθ

x = e−r sin(6θ), y = er cos(6θ)

δx/δθ = -6rcos(6θ)e−r sin(6θ), δx/δr = -sin(6θ)e−r sin(6θ)

δy/δθ = -6rsin(6θ)er cos(6θ), δy/δr = cos(6θ)er cos(6θ)

∂(x, y) /∂(r, θ) = δx/δθ × δy/δr - δx/δr × δy/δθ

= -6rcos(6θ)e−r sin(6θ) × cos(6θ)er cos(6θ) - [-sin(6θ)e−r sin(6θ) × -6rsin(6θ)er cos(6θ)]

= -6rcos²(6θ)e−r (sin(6θ) - cos(6θ)) - 6rsin²(6θ)e−r (sin(6θ) - cos(6θ))

= -6re−r (sin(6θ) - cos(6θ)) [cos²(6θ) + sin²(6θ)]

= -6re−r [sin(6θ) - cos(6θ)] since [cos²(6θ) + sin²(6θ)] = 1

6 0

3 years ago

Draw an area model 1.1x2.4

Alexus [3.1K]

You have to draw a rectangle and label the longer side 2.4 and the shorter side 1.1

5 0

2 years ago

Erin has a $450 gift card from a clothing store. She has spent 28 so far. She wants to buy barrettes for 2.95 each. How many bar

Sphinxa [80]

Answer:

143

Step-by-step explanation:

450-28= 422

422÷2.95= 143.05

round down to 143

Written explanation:

If her first card had $450 but she spent $28 that means she only has $422 left. In order to find out how many barrettes she can buy you divide the amount she has left by 2.95 and get roughly 143.05 barrettes, but you can't go over the budget so at the max Erin can only get 143 barrettes

6 0

3 years ago

A cars gas mileage refers to its rate in miles traveled per gallon of gas. Kara's family is thinking about renting a camper that

kifflom [539]

Answer: 10 ¹/₂ miles per gallon

Step-by-step explanation:

The gas mileage of the camper refers to the distance (in miles for this question) that the camper can travel on 1 gallon of gas.

The camper can travel 3¹/₂ miles on ¹/₃ gallons so the mileage is:

= Distance traveled/ Gallons used

= 3¹/₂ ÷ ¹/₃

= 7/2 * 3/1

= 21 / 2

= 10 ¹/₂ miles per gallon

8 0

2 years ago

A particular computer takes 13 minutes to download a 39 minute TV show. How long will it take the computer to download a 2 hour

ddd [48]

Answer:

40mins

Step-by-step explanation:

Change 2hrs into minutes first=120mins

if 39mins=13mins

120mins=?

Then you cross multiply

$\frac{120mins}{39mins} \times 13mins \\ = 40mins$

5 0

2 years ago