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2 years ago

13

a plumber needs to replace 20 feet of copper piping. When he gets to the supply store, the lengths are given in meters. How many

meters of piping does he need to purchase

1 answer:

larisa [96]2 years ago

7 0

6 meters. You just need to switch the feet to meters.

You might be interested in

An angle measures 64° more than the measure of a complementary angle. What is the measure of each angle?

GarryVolchara [31]

Complementary angles are 90 degrees,so if the angle is 64 degrees more,you just only have to add 90+64=154.

The measure of the angle is 154 degrees

Hope i helped.

Remember:complimentary angles add up to 90 while supplementary angles add up to 180.

6 0

3 years ago

Marjorie has a square tabletop whose area is 36 square feet. What is the tabletop’s perimeter?

mafiozo [28]

24. Since the area of a square is 36, it's best to figure out what the factors of 36 are.

The square root of 36 is going to be 6 so both factors are going to be six.

You don't have to worry about the side lengths being different because it's a square; therefore, the sides can't be uneven like a rectangle characteristically would.

5 0

2 years ago

Faith is working two summer jobs, making $13 per hour lifeguarding and $12 per hour washing cars. Last week Faith worked a total

san4es73 [151]

Answer:

Step-by-step explanation:

Let's call lifeguarding L and car washing W. In order to write a system, we need to first separate the NUMBER of hours worked from the MONEY earned, because they are very different things.

If she works 10 hours, that is the number of hours worked between both jobs. Therefore, the equation for the NUMBER of hours worked is

L + W = 10.

If she earns $13 an hour lifeguarding, the expression for that is 13L; if she earns $12 an hour car washing, the expression for that is 12W. The MONEY she earned together by doing both those jobs is

13L + 12W = 124

There you go!

7 0

3 years ago

Find the value of the variable and the measure of each labeled angle.

nalin [4]

X + 18 = 5x - 38

x - x + 18 = 5x - x - 38

18 = 4x - 38

18 + 38 = 4x - 38 + 38

56 = 4x

56/4 = 4x/4

14 = x

3 0

2 years ago

Dana has 800 yards of fencing to enclose a rectangular area. Find the dimensions of the rectangle that maximize the enclosed are

grin007 [14]

Answer:

Perimeter of rectangle states that total distance around the outside, which can be found by adding together the length of each side.

As per the given statement, Dana has 800 yards of fencing to enclose a rectangular area.

Therefore, perimeter of rectangle = 800 yards.

Perimeter(P) of rectangle is given by :

P = 2(x+y) where x is the length and y is the width of the rectangles respectively.

Then,

2(x+y) = 800

Divide both sides by 2 we get;

x+y =400

or

y = 400 -x .....[1]

We know, the area(A) of rectangle is given by

A = xy .....[2]

Substitute equation [1] into [2] we get;l

A = x(400-x)

using distributive property $a\cdot (b+c) = a\cdot b+ a\cdot c$

$A = 400x -x^2$

or

$A =-x^2+400x$ ......[3]

To maximize the enclosed area.

For a quadratic function in standard form $y =ax^2+bx+c$ , the axis of symmetry is a vertical line given by;

$x = -\frac{b}{2a}$

Then; we have from equation [3]

a = -1 and b = 400

By axis of symmetry;

$x = -\frac{b}{2a}$ = $-\frac{400}{2 \cdot -1} =\frac{400}{2} = 200$

Substitute in equation [1] to solve for y:

y = 400 - 200 = 200

The dimensions of the rectangle that maximize enclosed area are:

x = 200 units and y = 200 units.

Maximum area = $200 \times 200 = 40,000$ square units.

We can say that maximum area of rectangle will always be a square

4 0

2 years ago