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3 years ago

Pl help it for homwork

Mathematics

1 answer:

shtirl [24]3 years ago

4 0

Answer:

C) x=2 y=-5

y=7x-19

-2x+3(7x-19)=-19

19x=38

x=2

-2(2)+3y=-19

y=-5

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Find

Westkost [7]

Answer:

dy/dx = -b/a cot α

Step-by-step explanation:

x² / a² + y² / b² = 1

Take derivative with respect to x.

2x / a² + 2y / b² dy/dx = 0

2y / b² dy/dx = -2x / a²

dy/dx = -b²x / (a²y)

Substitute:

dy/dx = -b²a cos α / (a²b sin α)

dy/dx = -b cos α / (a sin α)

dy/dx = -b/a cot α

8 0

3 years ago

- If the area of a square is multiplied by nine, the area becomes 16 square inches. Find the

mojhsa [17]

Answer:

1⅓ inches

Step-by-step explanation:

Area = side² = x²

9(x²) = 16

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4 0

3 years ago

HURRY ITS URGENT!!!!

MArishka [77]

It has to be either A or B

5 0

2 years ago

25 miles an hour equals how many meters per minute

aivan3 [116]

25 miles per hour equals 11.176 meters per second.

3 0

3 years ago

Can y’all please answer this question

USPshnik [31]

Answer:

The customer will pay $19

Option B is correct.

Step-by-step explanation:

Price of Ham per pound = $5.99

Price of Turkey per pound = $4.99

Price of Roast beef per pound = $6.99

Price of Salami per pound = $2.99

Price of Bologna per pound = $3.99

Customer purchased:

Ham = $\frac{1}{4}$ pound

Turkey = $1\frac{1}{2}=\frac{3}{2}$ pound

Roast beef = 1 pound

Bologna = $\frac{3}{4}$ pound

We will multiply the pound purchased with per pound price and add them to find the total cost.

The customer will pay :

$\frac{1}{4}\times5.99+\frac{3}{2} \times4.99+1\times6.99+\frac{3}{4}\times3.99$

$=1.4975+7.485+6.99+2.9925\\=18.965\\\approx19$

So, the customer will pay $19

Option B is correct.

5 0

3 years ago