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Aleks04 [339]
3 years ago
9

If 15 cans of food are needed for 7 men for 2 days, the number of cans for 4 men for 7 days is

Mathematics
2 answers:
KatRina [158]3 years ago
8 0
15/2 = 7.5 can per dat

7.5/7 = 1.1 = 1 can per man

1 x 4 = 4 cans per day

4 x 7 = 28

Final answer would be 28 if you round. If you don’t the answer would come out to be 30.8. Take your pick.
Scorpion4ik [409]3 years ago
6 0
If 15 cans of food are needed for 7 men for 2 days, then 30 cans of food are needed for 4 men for 7 days. 

Assuming that the men eat every day, without skipping a day, then the first part of the sentence is basically saying 15 cans can feed 14 men. There are seven men who can survive off part of the 15 cans on day one, and seven men who can survive off of what's left of the 15 cans on day two.  The 15 cans have the potential to feed 14 men in one day basically. Applying this same theory, x number of cans has the potential to feed 28 (that's 4 men for 7 days). If these cans are the same size and are equal in terms of how filling its contents are, then we can set up a proportion.

15/14 = x/28
If 15 cans of food can feed 14 men, then x cans of food can feed 28 men.
Cross Multiply
14x = 420
Divide both sides by 14
x = 30

30 cans of food can feed 4 men for 7 days. Hope this helps!
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What is the inverse of y = 3x + 9? A. y= 1/3x - 3 B. y = 1/3x + 9 C. y = -1/3x - 3 D. y = 9x + 3
Aneli [31]

Answer:

1/3x - 3

Step-by-step explanation:

To find the inverse, we exchange x and y and then solve for y

y =3x+9

Exchange x and y

x = 3y+9

Then solve for y

Subtract 9 from each side

x-9 =3y+9-9

x-9 = 3y

Divide by 3

1/3(x-9) = 3y/3

1/3(x-9) = y

Distribute

1/3x-3 = y

The inverse is 1/3 x -3

6 0
3 years ago
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adelina 88 [10]
A) Law of Detachment...
3 0
3 years ago
Select the correct answer. What is the equation of the line that has a slope of 3 and goes through the point (-3,-5)? A. y = 3x
kodGreya [7K]

Answer:

y = 3x + 4

Step-by-step explanation:

6 0
3 years ago
What are the solutions of the equation x4 + 95x2 – 500 = 0? Use factoring to solve.
Ivanshal [37]

Answer:

{√5, 10i, -10i}

Step-by-step explanation:

Please use " ^ " to denote exponentiation:

x^4 + 95x^2 – 500 = 0

Temporarily substitute y for x^2:

y^2 + 95y - 500 = 0

Factor this result:

y^2 + 95y - 500 = 0 = (y + 100)(y - 5)

Set each of these factors = to 0 and solve for y:

y + 100 = 0, or y = -100.  Returning to x^2 = y, we get x^2 = -100.  The square root of a negative number is imaginary, so we must omit this possible answer.

y - 5 = 0 yields y = 5, and, in turn, 5 = x^2.  Thus, taking only the positive root, we get x = √5.

The solution to the given equation is x = √5.

If you want the imaginary roots also, then:

Take the square root of both sides of x^2 = -100, obtaining:

x = ± i(10).

In summary, the solution set (if imaginary solutions are acceptable) is

{√5, 10i, -10i}

7 0
3 years ago
Read 2 more answers
Simplify each expression. 3a^2b^-4/12a^-2b^-2, a=0, b=0
Maksim231197 [3]

Answer:

<u>The answer is that 36a⁴/b² is 0.</u>

Step-by-step explanation:

Let's simplify the expression given to us, this way:

3a^2b^-4/12a^-2b^-2

3a²b⁻⁴ ÷ 12a⁻²b⁻²

3a²/b⁴ ÷ 1/12a²b²

3a²/b⁴ * 12a²b²/1

36a⁴/b²

But let's recall that if a = 0 and b = 0, then we have:

36 * 0⁴ / 0² = 0

<u>The answer is that 36a⁴/b² is 0.</u>

3 0
3 years ago
Read 2 more answers
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