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oksano4ka [1.4K]

3 years ago

10

If n=4 the value of the expression 28-12+ square root of n divided by 2 is____.

1 answer:

Ann [662]3 years ago

4 0

C 17/2 hope this helps you

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Identify the law illustrated by:20x +50 is the same as 50+20x

Alisiya [41]

Answer:

The law is the Inverse law of Addition/Multiplication

Step-by-step explanation:

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3 years ago

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Solve the system of equations.<br> <img src="https://tex.z-dn.net/?f=%5Cleft%20%5C%7B%20%7B%7By%3D220x-160%7D%20%5Catop%20%7By%3

Leni [432]

$\begin{cases} y=220x-160\\ y=20x^2-400 \end{cases}\qquad \qquad \stackrel{\textit{substituting on the 2nd equation}}{\stackrel{\textit{\Large y}}{220x-160}~~ = ~~20x^2-400} \\\\\\ -160=20x^2-220x-400\implies 0=20x^2-220x-240 \\\\\\ 0=20(x^2-11x-12)\implies 0=x^2-11x-12 \\\\\\ 0=(x-12)(x+1)\implies x= \begin{cases} 12\\ -1 \end{cases}$

$\dotfill\\\\ x=12\qquad \qquad \stackrel{\textit{substituting on the 1st equation}}{y=220(12)-160}\implies y=2480 \\\\\\ x=-1\qquad \qquad \stackrel{\textit{substituting on the 1st equation}}{y=220(-1)-160}\implies y=-380 \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill (12~~,~~2480)\qquad (-1~~,~~-380)~\hfill$

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2 years ago

What is the missing reason in step 3? A 2-column table with 6 rows is shown. Column 1 is labeled Statements with entries measure

Sholpan [36]

Answer:

B

Step-by-step explanation:

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3 years ago

(50 points) need help with khan practice geometry

Vedmedyk [2.9K]

The awnser is 60 because

It is a cube so it has the smae amout of sides

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2 years ago

Solve for x: 3x-2>5x+10

Pani-rosa [81]

Combine like terms:

3x-2>5x+10 becomes -12 > 2x

Dividing both sides by 2, we obtain x < -6

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3 years ago

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