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Sav [38]
3 years ago
14

Anyone can help me out?​

Mathematics
1 answer:
ryzh [129]3 years ago
3 0

Answer:

y=90

Step-by-step explanation:

y is a right angle, and all right angles are 90 degrees! Please mark brainliest and press the thanks button! :)

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Does this table represent a function or not? Why or why not?
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D. No, because two of the y-values are the same

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You have 976 grams of a radioactive kind of rhodium. How much will be left after 120 seconds if its half-life is 30 seconds?
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Use the method of ELIMINATION to solve the system. You must SHOW ALL WORK. Make sure you have an answer for both x and y.
jekas [21]

Answer:

<h3>Required <u>Answer</u><u>:</u><u>-</u></h3>

\sf 4x+8y=10\dots\dots (1)

\sf -4x+2y=-30\dots\dots (2)

  • by adding eq (1) and eq (2) we get

{:}\longrightarrow\sf 4x+8y=20

{:}\longrightarrow\sf -4x+2y=-30

<h2>__________________________</h2>

{:}\longrightarrow\sf 10y=-10

{:}\longrightarrow\sf y={\dfrac {-10}{10}}

{:}\longrightarrow{\underline{\boxed{\bf y=-1}}}

  • Substitute the value in eq (2)

{:}\longrightarrow\sf -4x+2 (-1)=-30

{:}\longrightarrow\sf -4x-2=-30

{:}\longrightarrow\sf -4x=-30+2

{:}\longrightarrow\sf -4x=-28

{:}\longrightarrow\sf x={\dfrac {-28}{-4}}

{:}\longrightarrow{\underline{\boxed{\bf x=7}}}

\therefore{\underline{\boxed{\bf (x,y)=(7,-1)}}}

6 0
3 years ago
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Help me please on this question .....!.!.!.!.!.!.!.!.!.!.
Zigmanuir [339]

If you look through the chart, you'll see that in each column,
the amount of money donated is 1/5 the number of lunch
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The equation is:

Donation amount = (1/5) · (lunch specials sold) .

The constant of proportionality in money per lunch special sold
is $1/5 or 20 cents.
7 0
3 years ago
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