All categories

3 years ago

I need help quickkkkkkkkkkkk

Mathematics

1 answer:

timurjin [86]3 years ago

4 0

Answer:

(-1)^2

Step-by-step explanation:

If you look back to the rules of negative and positive - × - = +

So it's -1 × -1= 1

Adiosss

You might be interested in

What is the correct order of statements and reasons to complete the proof? help please

Rufina [12.5K]

The answer will be A due to them being on opposite sides with the triangle having adjacent measures so both of those angles given provide the same measure

4 0

2 years ago

Read 2 more answers

Need some help with these problems!

LekaFEV [45]

Answer:

h=12, w=24, t=8

Step-by-step explanation:

System of Linear Equations

We have 3 unknown variables and 3 conditions between them. They form a set of 3 equations with 3 variables.

We have the following data, being

w = price of a sweatshirt

t = price of a T-shirt

h = price of a pair of shorts

19.

The first condition states the price of a sweatshirt is twice the price of a pair of shorts. We can write it as

$\displaystyle w=2h$

The second condition states the price of a T-shirt is $4 less than the price of a pair of shorts. We can write it as

$\displaystyle t=h-4$

The final condition states Brad purchased 3 sweatshirts, 2 pairs of shorts, and 5 T-shirts for $136, thus

$\displaystyle 3w+2h+5t=136$

This is the system of equations we need to solve for w,t,h

20.

To solve the system, we replace w in terms of h and t in terms of h. Those relations have been already written, so

$\displaystyle 3(2h)+2h+5(h-4)=136$

Operating

$\displaystyle 6h+2h+5h-20=136$

$\displaystyle 13h=156$

Solving for h

$\displaystyle h=12$

The other two variables are

$\displaystyle w=2h=24$

$\displaystyle t=12-4=8$

4 0

3 years ago

The amount of chlorine in a swimming pool varies directly with the volume of water. the pool has 2.5 milligrams of chlorine per

djverab [1.8K]

Answer:

Find out the how much chlorine is in the pool .

To prove

As given

The amount of chlorine in a swimming pool varies directly with the volume of water.

The pool has 2.5 milligrams of chlorine per liter of water.

i.e

2.5 milligrams of chorine = 1 litre of water

There are 8000 gallons of water in the swimming pool.

As 1 gallons = 3.78541 litre (Approx)

Now convert 8000 gallons of water in litres.

8000 gallons = 8000 × 3.78541 litre

= 30283.28 litres

Now calculate chlorine in the pool for 30283.28 litres of waters.

2.5 milligrams of chlorine = 1 litre of water

2.5 × 30283.28 milligrams of chlorine = 30283.28 litre of water

75708.2 milligrams of chlorine for 30283.28 litre of water .

3 0

2 years ago

Read 2 more answers

A square has a perimeter of 18cm. How long is the side of the square? 15 POINTS**

emmainna [20.7K]

Answer:

Each side is 4.5 cm

Step-by-step explanation:

$18 \div 4 = 4.5$

To find the perimeter of a square you add all the sides.

But to find the side length you do the opposite. Which is the equation above.

Hope this helps : )

5 0

3 years ago

-.25 x+1.3=-.55x-.2 find x

Mamont248 [21]

You need to isolate the variable my dividing each side by factors that don’t contain the variable
x=-5

3 0

2 years ago