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Alexxandr [17]
3 years ago
8

The sum of a number and its ??? equals 0

Mathematics
1 answer:
yarga [219]3 years ago
6 0
Sum of the number and its of inverse equals 0.
a+(-a)=a-a=0
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the sum of three numbers is 2100. the first number x is equal to the sum of the other two (y and z) which are equal to each othe
max2010maxim [7]
We will have a system of equations, and we are going to solve it by using substitution.
Let's make the equations.
x+y+z=2100
z+y=x
Since y and z are equal, I think it is easier for us to have them as one variable for now. Let the value of z and y be a.
These are the equations now.
x+2a=2100
2a=x
Since the second equation is giving the value of x, let it replace the value of x also in the first equation.
2a+2a=2100
4a=2100
2100÷4= 525
so, x and y equal 525. Let's put this in our original equation.
x+525+525=2100
x+ 1,050= 2,100
x= 1,050
So, x=1,050, y= 525 =z.

7 0
3 years ago
Rank the following from least to greatest based on their axis of symmetry.
brilliants [131]
Finding the axis of symmetry.
1) Identify a, b, and c in the equation
f(x) = 4x² - 1 ⇒ a = 4 ; b = 0 ; c = -1
g(x) = x² - 8x + 5 ⇒ a = 1 ; b = -8 ; c = 5
h(x) = -3x² - 12x + 1 ⇒ a = -3 ; b = -12 ; c = 1

2) Formula of the axis of symmetry
x = -b/2a
f(x) ⇒ x = -0/2(4) = 0
g(x) ⇒ x = -(-8)/2(1) = 8/2 = 4
h(x) ⇒ x = -(-12)/2(-3) = 12/-6 = -2

Rank from least to greaters: -2, 0, 4 ⇒ h(x) ; f(x) ; g(x) CHOICE D
3 0
3 years ago
In this figure
alina1380 [7]

Answer:

∠y = 62.5°

∠x  =  27.5°

Step-by-step explanation:

z is right angle. ∠z = 90°

∠x = ∠y - 35

∠x + ∠y + ∠z = 180      {Angle sum property of triangle}

y - 35 + y + 90 = 180

y + y - 35 + 90 = 180 {Combine like terms}

  2y  + 55 = 180

          2y = 180 -55      {Subtract 55 from both sides}

          2y = 125         {Divide both sides by 2}

            y = 125 /2

∠y = 62.5°

∠x = 62.5 - 35 = 27.5°

6 0
2 years ago
5. Draw the number line graph of -3.
love history [14]
Idk if this is what you’re looking for but here you go

5 0
3 years ago
Write the hourly wage 15 dollars an hour as a fraction
amid [387]

it can be written like this, hope this helps: $15/hour <3

4 0
2 years ago
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