3 years ago

Which expression is equivalent to 12•2•3

Mathematics

1 answer:

Ivahew [28]3 years ago

3 0

Answer:

4 x 3 x 2 x 3

Step-by-step explanation:

4 x 3 = 12

12 x 2 = 24

24 x 3 = 36

It doesn't matter what order it will come out to be 36 in every situation, since PEMDAS isn't needed.

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What number must you add to complete the square? x^2+26x=33

katrin2010 [14]

Answer:

Must add: 202

Step-by-step explanation:

$The \ formula \ for \ perfect \ square => (a + b)^2 = a^2 + 2ab + b^2$

a = x

2ab = 26x

2ab = 26a [ substitute a instead of x]

$b = \frac{26a}{2a}$

b= 13

So,

$(x + 13)^2 = x^2 + 26x + 169$

But given equation is :

$x^2 + 26x = 33\ => \ x^2 + 26x -33 = 0$

We have find the difference between 169 and -33 to get the number that should be added to get the perfect square.

That is , 169 - (-33) = 202

Therefore ,

$x^2 + 26x -33 + 202 \ makes \ given \ equation \ a \ perfect \ square$

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3 years ago

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3 years ago

The roots of the equation are 2+9i and 2-9i.

AnnZ [28]

I think the answer is texc=?/tex

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3 years ago

How many solutions are there to the system of equations? StartLayout enlarged left-brace 1st row 4 x minus 5 y = 5 2nd row negat

kkurt [141]

Answer:

Only one solution $x=\frac{5}{4},y=0$

Step-by-step explanation:

$4x-5y=5..............(1)\\0.08x+0.10y=0.10...........(2)$

Multiply equation $(2)$ by $50$

$4x-5y=5........(3)$

Now from equation $(1)$ $+$ equation $(3)$

$8x=10\\x=\frac{10}{8}\\x=\frac{5}{4}$

Put the value in equation $(1)$

$5-5y=5\\5y=0\\y=0$

hence only one solution exists $\left(\frac{5}{4},0\right)$ .

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a_sh-v [17]

Answer:

1ST ONE BLUE ONE

Step-by-step explanation:

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