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rodikova [14]
4 years ago
11

Complete the square to determine the maximum or minimum value of the function defined by the expression. x2 + 12x + 42

Mathematics
2 answers:
Natalija [7]4 years ago
7 0

Answer:

x^2 or x*2

Step-by-step explanation:

skelet666 [1.2K]4 years ago
6 0

-18 please mark as brainliest
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Solve the system using substitution.
Maru [420]

Answer:

Given: The following system:

4x + y − 2z=18          ......[1]

2x-3y+3z = 21          ......[2]

x-3y=6                      ......[3]

we can write equation [3] as;

3y = x-6                     ......[4]

Multiply by 3 in equation [1] to both sides of an equation we get,

3 \cdot(4x+y-2z)= 3\cdot 18 or

12x+3y-6z=54              ......[5]

Substituting the equation [4] in [2] and [5] we get;

2x-(x-6)+3z=21 or

2x-x+6+3z=21

Simplify:

x+3z=15            .....[6]                       [combine like terms]

12x+x-6-6z =54

Simplify:

13x-6z=60         ......[7]        [Combine like terms]

On Solving equation [6] and [7] simultaneously,

x+3z=15

13x-6z=60

we get the value of x

i.e, x=6

Substitute the value of x in equation x+3z=15  we get

6+3z=15 or

3z=9

Simplify:

z=3

Also, substitute the value of x=6 in equation [3] we get the value of y;

x-3y=6

6-3y=6 or

-3y = 0

Simplify:

y = 0

Therefore, the solution to the system of three linear equation is, (6, 0 , 3)


5 0
3 years ago
Ed saved $50 one week. For the next 6 weeks he saved $25 more than he saved the week before. How much did he save in all? One st
Grace [21]

Answer:$825. 00

Add $25.+50. For week 1 then add $25.each additional week for 6weeks.

Step-by-step explanation:

4 0
3 years ago
If something costs $105.00 , and you have a 35% discount, how much would it be ?
leonid [27]
The answer would be 68.25
5 0
3 years ago
Read 2 more answers
What is 8/10 x 8/21
ivann1987 [24]
8/10*8/21
= 64/210
= 32/105
5 0
3 years ago
Read 2 more answers
One of the equations below is not correct. Which on is incorrect. Then explain the error that was made and write the correct ans
timurjin [86]
Only 3 is false, because of spare minus.
3 0
3 years ago
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