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podryga [215]
3 years ago
5

Explain how you can find the opposite of the opposite of any number without using a number line

Mathematics
2 answers:
sergiy2304 [10]3 years ago
6 0
You can solve this by multiplying any negative by a negative 1 ex. -(-11) = 11
asambeis [7]3 years ago
3 0
The opposite of a number will be that number with a negative sign.

Examples:

Opposite of 5: -5
Opposite of -10: -(-10) = 10
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A drive-through car wash can wash 10 vehicles in 45 minutes. At this rate, how long would it take to wash 4 cars?
sveta [45]

Answer:

18

Step-by-step explanation:

First we need to know how many vehicles they can wash in a minute.

1. So you do 10/45. You get 4.5

2. Now that you know that they wash 1 vehicle in 4.5 minutes, you mulitply that by 4. And you get 18.

Hope this helps! :D

6 0
3 years ago
Read 2 more answers
I need help on this!! please help
alina1380 [7]

Answer:

p+33+p-19+2p-46=180

Step-by-step explanation:

Add all your variables and all your numbers and then simplify

6 0
3 years ago
Read 2 more answers
a rock is launched from a canon. it's height, h(x), can be represented by a quadratic function in terms of time, x, in seconds.
ratelena [41]
This is the quadratic function:
h(x)=ax²+bx+c

We have two points:
(1,58)
(2,112)

Now, we calculate this quadratic funtion.

we assume that h(0)=0
Therefore:
a(0)²+b(0)+c=0
c=0

(1,58)
a(1)²+b(1)=58
a+b=58  (1)

(2,112)
a(2)²+b(2)=112
4a+2b=112
2a+b=56  (1)

With the equations (1) and (2) we make a system of equations:
a+b=58
2a+b=56
we can solve this system of equations by reduction method.
-(a+b=58)
2a+b=56
---------------------
a=-2

-2(a+b=58)
 2a+b=56
-------------------
       -b=-60  ⇒  b=60

The function is:
h(x)=ax²+bx+c
h(x)=-2x²+60x

Now find the height, in feet, of the rock after 10 seconds in the air.

h(10)=-2(10)²+60(10)
h(10)=-200+600=400

Answer: 400 ft.
6 0
3 years ago
Read 2 more answers
Suppose that the number of pounds of grapes sold by the Smalltown Co-op grocery store in a day is equally likely to be anywhere
Alex

Answer:

The height of the function for any number of pounds between 0 and 100 is 0.01.

Step-by-step explanation:

As described, the probability density function is a uniform probability density function, between the values 0 and 100 pounds.

To calculate the height h of the probability density function, we can write:

\int\limits^{100}_0 {h} \, dx=1

If we solved this integration and rearrange

\int\limits^{100}_0 {h} \, dx=1\\h*(100-0)=1\\100*h=1\\h=0.01

The value of the height of the probability density function is 0.01 for every value between 0 and 100 pounds.

4 0
3 years ago
Can some one help me with this math problem and explain their self's as well?
yaroslaw [1]

Answer:

20 side polygon: 180 x (20 -2)

Step-by-step explanation:

A n side polygon can be divided into n-2 triangles

each triangle has 180°

n-2 triangles have 180 x (n-2) degrees

3 0
3 years ago
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