Me with number 3 and number 4 those are questions ok? you

3). 900 bricks

4.) h=15 inches

Step-by-step explanation:

3). the total volume is 450x18x108=874,800

now divide that by the volume  of each brick

874,800 divided by 972=900

4)The volume of box A =10x12x18=2160 so the volume of box B is half of that so it is 1080.

The volume of Box B is base area x height=volume so

72h=1080, divide 1080 by 72 and h=15

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

ιт ιѕ (9χ^5+10)(81χ^10-90χ^5+100)

step-by-step explanation:

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