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EastWind [94]
3 years ago
8

Cam someone answer this plz?

Mathematics
2 answers:
Ann [662]3 years ago
8 0

Answer:

C

Step-by-step explanation:

for example if it was 2 x 3= 6 but them tripled is 5x9=54 and that is 9 times the original surface area

Irina18 [472]3 years ago
6 0

Answer:

24

Step-by-step explanation:

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Three students were given the expression shown to simplify.
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2-21x+28
-21x +3
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HELP PLSS I DONT WANNA FAIL
posledela

Answer: 1/2 and 3/6

Explanation: 1/2 is equal to 3/6 because if you divide both 3 and 6 by 2 it’s 1/2

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2 years ago
Use what you have learned to solve the following polynomial equation by either completing the square or using the quadratic form
USPshnik [31]
<span>(x^2-4x-6) factors into:</span>
(x -5.1623)     (x+1.1623)
Therefore x = 5.1623 and      x = -1.1623

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7 0
3 years ago
Solve system of equation algebraically <br> y = 2x - 3<br> x + y = 18
natima [27]

Answer:

x = 7

y = 11

Step-by-step explanation:

Given the system;

y = 2x - 3

x + y = 18

1. Approach

The easiest way to solve this system of equations is to solve the second equation for the variable (y). Then add the systems, use algebra to solve for the value of (x), then substitute that value back into one of the original equations to solve for the value of (y). Another name for the method in use is the method of elimination, this is when a [erspm manipulates one of the equations in a system of the equation such that when they add the equations, one of the variables eliminatates. Thus, they can solve for the other variable and the backsolve for the value of the unknown variable.

2. Solve one of the equations for a variable

Manipulate the system such that each equation is solved for the same variable,

x + y = 18

Inverse operations,

x + y = 18

-18        -18

x + y - 18 = 0

   -y         -y

x - 18 = -y

3. Use elimination

Now substitute this back into the original system,

y = 2x - 3

-y = x - 18

Add the systems,

y = 2x - 3

-y = x - 18

_________

0 = 3x - 21

Inverse operations,

0 = 3x - 21

+21       +21

21 = 3x

/3    /3

7 = x

4. Find the value of the unknown variable

Backsovle to find the value of (y),

x + y = 18

Substitute,

7 + y = 18

Inverse operations,

7 + y = 18

-7        -7

y = 11

3 0
2 years ago
Read 2 more answers
What is i + 6i? You have to simplify
marissa [1.9K]

i=1i\\\\i+6i=1i+6i=(1+6)i=\boxed{7i}

3 0
3 years ago
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