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3 years ago

GET 11 POINTS AND A THANKS AND BE NAMED BRAINIEST

Mathematics

1 answer:

babunello [35]3 years ago

3 0

Answer:

B. Tire barn 20% rebate Cory will save $36

Step-by-step explanation:

If you take 20% off of $180 you are left with 144 dollars. This means that $36 was taken off.

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(5a-5)(2a+2) Find each product

weeeeeb [17]

(5a-5)(2a+2)
= 5a*2a -5*2a + 2*5a - 5*2
= 10a^2 - 10a + 10a - 10
= 10a^2 - 10

The product of the equation is 10a^2 - 10

6 0

3 years ago

Read 2 more answers

Helpppppp mathhhhhhhhh

creativ13 [48]

I hope this helps you

cos71=15/P

0.325=15/P

P=46.15

8 0

4 years ago

Suppose a tub has the shape of an elliptical paraboloid given by z = ax2+by2 (where a, b are some positive constants). If a marb

Umnica [9.8K]

Answer:

It would roll in this direction.

$\nu = (-a/\sqrt{a^2+b^2},-b/\sqrt{a^2+b^2})$

Step-by-step explanation:

It would roll to the direction of maximum decrease, which is the -1 times the direction of maximum increase, which is given by the gradient of the function.

Since

$z = ax^2 + by^2$

For this case, the gradient of your function would be

$\nabla z = (2ax , 2by)$

And -1 times the gradient of your function would be

$-\nabla z = (-2ax , -2by)\\$

Then, at

$(1,1,a+b),\\x = 1 \\y = 1$

So it would go towards

$v = (-2a,-2b)$

The magnitud of that vector is

$|v| = 2\sqrt{a^2+b^2}$

and to conclude it would roll in this direction.

$\nu = (-a/\sqrt{a^2+b^2},-b/\sqrt{a^2+b^2})$

6 0

3 years ago

The radius of a circle is 11 feet. What is the circle's area? Use 3.14 for

vovikov84 [41]

Answer:

Formula for area of a circle;

A = πr^2

where pi is 3.14 in this case, and r is the radius squared

Plug in the actual values;

A = 3.14 x 11^2

A = 3.14 x 121

A = 379.94 square feet

7 0

2 years ago

Solve 5kx + 6 = 7kx for x. А. x=3/k в. х = -2/k с. x =-3/k D. x=2/k

slamgirl [31]

Answer:

A. x = 3/k.

Step-by-step explanation:

5kx + 6 = 7kx

5kx - 5kx + 6 = 7kx - 5kx

6 = 2kx

x = 6 / 2k

x = 3/k.

7 0

3 years ago