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2 years ago

If x > 3, Which of these numbers could be a possible number for x?

Mathematics

2 answers:

fgiga [73]2 years ago

7 0

Answer:

Step-by-step explanation:

the Awnser is D because x is greater than three and 4 is the only number listed that is larger than 3

TEA [102]2 years ago

4 0

Answer:

D. 4

Step-by-step explanation:

x is greater than 3, which means x has to be a higher number. the only option here that is higher than 3 is 4.

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A rectangular box is to have a square base and a volume of 40 ft3. If the material for the base costs $0.36/ft2, the material fo

blagie [28]

Answer:

length: 2 ft
width: 2 ft
height: 10 ft

Step-by-step explanation:

The total cost of the top and bottom is $0.36 + 0.14 = $0.50 per square foot.

The total cost of a pair of opposite sides is $0.05 +0.05 = $0.10 per square foot.

A minimum-cost box will have the cost of any pair of opposite sides be the same. Here, that means the box will have a side area that is 5 times the area of the top or bottom.

Since the base is square, that means the box is the shape of 5 cubes stacked one on the other. Each of those would be 8 ft³, so would have edge dimensions of ∛8 = 2 feet. The height is 5 times that, or 10 ft.

The box is 2 feet square by 10 feet high:

length: 2 ft
width: 2 ft
height: 10 ft

_____

If you feel the need to write an equation, you can let x represent the edge length of the base. Then the cost of the top and bottom will be ...

top&bottom cost = 0.50·x²

The height of the box is 40/x², so the cost of the four sides will be ...

side cost = (0.05)(4x)(40/x²) = 8/x

This is minimized when the derivative of the sum of these costs is zero:

cost = top&bottom cost + side cost

cost = 0.50x² + 8/x

d(cost)/dx = 1.00x -8/x² = 0

Multiplying by x², we get ...

x³ -8 = 0

x = ∛8 = 2 . . . . . . as above

height = 40/x² = 40/4 = 10 . . . . . as above

6 0

3 years ago

97+(-27)+(-89)+(-54)

RUDIKE [14]

Step 1:

$97+(-27)+(-89)+(-54)$

Step 2:

$= 97 - 27 - 89 - 54$

Info:

(+) ×(-)=-

Step 3:

$= 97 - 170$

Step 4:

$= - 73✓$

8 0

3 years ago

I NEED HELP PLEASE HELP. SHOW ME HOW YOU DID IT

victus00 [196]

Sin = - 4/8

Quadrant IV = only cosine is positive

a = height (4)
b = base ( 8^2-4^2=b^2
b = 6.93 @
$\sqrt{48}$

c = hypothenuse(8)

cos =
$\sqrt{48}$
/8

tan = - 4/
$\sqrt{48}$

sec = 1/cos
1/cos = 1/ (
$\sqrt{48}$
/8)
sec = 8/
$\sqrt{48}$

csc = 1/sin
1/sin = 1/(-4/8)
csc = - 2

cot = 1/tan
1/tan = 1/(-4/
$\sqrt{48}$
)
cot = -
$\sqrt{48}$
/4

5 0

2 years ago

Help me please lolll pleaseee it’s a picture

finlep [7]

Answer:

C) 14

Step-by-step explanation:

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other.

Multiply -2 to both sides of the equation. Note that, when multiplying two negative numbers, your outcome will be positive:

(-2)((-1/2)x) = (-7)(-2)

x = -7 * -2

x = 14

C) 14 is your answer.

4 0

2 years ago

To dip or not to diP

Aleks04 [339]

Answer:

Dip shunnnnnnnnnnnnnn

Step-by-step explanation:

4 0

2 years ago