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oksano4ka [1.4K]
3 years ago
13

Help me please. its due soon

Mathematics
2 answers:
sleet_krkn [62]3 years ago
6 0

Answer: y = 11

Step-by-step explanation:

first, i collected the like terms.

7y + 9 = 4y + 42

then, i moved the terms.

7y - 4y + 42 - 9

then, i collected the like terms and calculated it.

3y - 33

finally, i divided both sides.

y = 11

ZanzabumX [31]3 years ago
4 0

Answer:

y = 11

Step-by-step explanation:

-5y + 12y + 9 = 4y + 42

Add like terms on the left side, -5y + 12y.

7y + 9 = 4y + 42

Subtract 4y from both sides.

3y + 9 = 42

Subtract 9 from both sides.

3y = 33

Divide both sides by 3.

y = 11

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(0,1) (3,-8) linear equation
Dmitry [639]

Answer:

The answer is

y =  - 3x + 1

Step-by-step explanation:

❃Incase you forgot what the linear equation formula is ☟

y = mx + b

❃Incase you also forgot, The is what the slope formula is ☟

m =  \frac{y_2 - y_1 }{x_2 - x_1}

➊ First: We are going to be solving for the slope.

m =  \frac{ - 8 - 1}{3 - 0}  =  \frac{ - 9}{ \:  \:  \: 3}  =  - 3

➋Second: We find the y-intercept.

y = mx + b \\  - 8 =  - 3(3) + b \\  - 8 =  - 9 + b \\   \frac{ + 9 =  + 9 \:  \:  \:  \:  \: }{1 = b}

➌Third: Plug in.

y =  - 3x + 1

8 0
3 years ago
What is the value of n in the equation 3n + 2(n + 2) = 9n + 12?<br><br> −4<br> −2<br> 2<br> 4
iren [92.7K]
<span>n = -2 is the correct answer</span>
6 0
4 years ago
The perimeter of a rectangle of lenght 6cm and width 4cm can be given as?​
kodGreya [7K]
6 + 6 + 4 + 4 = 20 = perimeter
4 0
4 years ago
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When a dot is used over a number in an inequality graph, what is true about the number?
Dafna11 [192]

Answer:

the number is greater than the variable.

Step-by-step explanation:

6 0
3 years ago
Heidi has an average score of 78 for her first six chemistry tests. If Heidi"s scores for the first four tests were 82,78,87, an
elixir [45]

Answer:

(A)74

Explanation:

Let her average score on the last two tests = x.

The six scores will now be: 82,78,87,73, x and x.

Since the average score for her first six chemistry tests = 78

\frac{82+78+87+73+x+x}{6}=78

We then solve for x.

\begin{gathered} 320+2x=78\times6 \\ 320+2x=468 \\ 2x=468-320 \\ 2x=148 \\ x=\frac{148}{2} \\ x=74 \end{gathered}

Her average score for the last two tests is 74.

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1 year ago
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