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2 years ago

7. What is the value of the expression? 3/4 divided by 1/2

Mathematics

1 answer:

erma4kov [3.2K]2 years ago

7 0

Answer:

3/4 / 1/2

3/4 * 2/1

6/4

1 2/4

1 1/2 or 1.5

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Need help please help

lilavasa [31]

Answer:

27 of the pets are dogs.

Step-by-step explanation:

Real easy way to do this, treat 45 (the total) as 100. So, do 45/100 then multiply the result of that by 60, and you end up with 27.

45/100=0.45

0.45*60=27

7 0

2 years ago

What does the B mean in 1.9+b=3.2

Flura [38]

1.3
You subtract 3.2 from 1.9 ; which gives you 1.3

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2 years ago

How do you write: One third of the opposite of a number is less than 12?

Romashka [77]

-1/3n = -12 is the way you write it

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2 years ago

Peter has 3200 yards of fencing to enclose a rectangular area. Find the dimensions of the rectangle that maximize the enclosed a

salantis [7]

Answer:

$A = 640000\,yd^{2}$

Step-by-step explanation:

Expression for the rectangular area and perimeter are, respectively:

$A (x,y) = x\cdot y$

$3200\,yd = 2\cdot (x+y)$

After some algebraic manipulation, area expression can be reduce to an one-variable form:

$y = 1600 -x$

$A (x) = x\cdot (1600-x)$

The first derivative of the previous equation is:

$\frac{dA}{dx}= 1600-2\cdot x$

Let the expression be equalized to zero:

$1600-2\cdot x=0$

$x = 800$

The second derivative is:

$\frac{d^{2}A}{dx^{2}} = -2$

According to the Second Derivative Test, the critical value found in previous steps is a maximum. Then:

$y = 800$

The maximum area is:

$A = (800\,yd)\cdot (800\,yd)$

$A = 640000\,yd^{2}$

8 0

3 years ago

Read 2 more answers

Rewrite the fractions with their LCD.

masya89 [10]

Well the best answer for LCD is $\frac{2}{5x+15y}$ is 5(x+3y) and the best answer for LCD is $\frac{1}{2x+6y}$ is 2(x+3y)

I hope this helps!

7 0

3 years ago