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3 years ago

8

8(10−k)=2k solve for k

2 answers:

Olenka [21]3 years ago

6 0

Plug in 8 for k and that's your answer

Delvig [45]3 years ago

3 0

<span>8(10−k)=2k
80 - 8k = 2k
80 = 10k
8 = k
or
k = 8</span>

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The difference of twice a number and 6 is at most 20 use the variable c for t he unknown number.

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3 years ago

What percent of 15y is 75?

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The prior probabilities for events A1 and A2 are P(A1) = 0.30 and P(A2) = 0.55. It is also known that P(A1 ∩ A2) = 0. Suppose P(

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We're given the following probabilities:

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3 years ago

You must design a closed rectangular box of width w, length l and height h, whose volume is 504 cm3. The sides of the box cost 3

Charra [1.4K]

Answer:

Dimensions will be

Length = 7.23 cm

Width = 7.23 cm

Height = 9.64 cm

Step-by-step explanation:

A closed box has length = l cm

width of the box = w cm

height of the box = h cm

Volume of the rectangular box = lwh

504 = lwh

$h=\frac{504}{lw}$

Sides which involve length and width and height, cost = 3 cents per cm²

Top and bottom of the box costs = 4 cents per cm²

Cost of the sides $C_{s}$ = 3[2(l + w)h] = 6(l + w)h

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$\frac{378}{w^{2}}=l$

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Now place the value of w from equation (1) to equation (2)

$(\frac{378}{l^{2}})^{2}=\frac{378}{l}$

$\frac{(378)^{2} }{l^{4}}=\frac{378}{l}$

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$w^{2}=\frac{378}{7.23}$

$w^{2}=52.28$

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(7.23)²h = 504

$h=\frac{504}{(7.23)^{2}}$

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