because every 7 books Miss. Nelson gets 2 free books so when Miss. Nelson bought the 7 books she got the 6 and also took 21 divided by 7 and you get 3 then you times that with the 2 and that is how you get 6 books for free

8 0

3 years ago

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Help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

lidiya [134]

2x^2 - quadratic - monomial
-2 - constant - monomial
3x - 9 - linear - binomial
-3x^2 - 6x + 9 - quadratic - trinomial

3 0

3 years ago

Use elimination to solve the system of equations. Show your work 5×-3y=6,2×+5y=-10.

Fofino [41]

Answer:

5(5x-3y=6)

3(2x+5y=-10)

25x-15y=30

6x+15y=-30

31x= 0

x = 0

5(0)-3y=6

-3y=6

y= -2

(0,-2)

6 0

3 years ago

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A banner in the shape of an isosceles triangle is hung over the side of a building. The banner has a base of 30ft (at the roof),

Rashid [163]

Answer:

W = 9600000 joules

Step-by-step explanation:

From the given information:

The area of the banner = 1/2 × 30 × 20 = 300 ft²

The mass of the banner = 300 × 50 = 15000 pounds

Now; the integral for the required work is:

$W = \int^h_o F \ ds$

here;

h = height of the building

F = mg = 15000g

g = 32 ft/s²

Therefore;

$W = \int ^h_o 15000g \ ds$

$W = \int ^{20}_0 \ 15000 (32)(20)$

W = 9600000 joules

7 0

3 years ago