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2 years ago

Evaluate 8 - 4.7y - x, when y = -1 and x = 2. A. -10.7 B. -9.7 C. 9.7 D. 10.7

Mathematics

1 answer:

zysi [14]2 years ago

5 0

The value of the equation is 10.7

Step-by-step explanation:

Step 1: Solve the equation when x = 2 and y = -1

⇒ 8 - 4.7y - x = 8 - 4.7 × -1 - 2 = 8 + 4.7 - 2

= 12.7 - 2 = 10.7

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PLZZZ HELPPPP ILL MARK BRAINLIEST TO FIRST AND CORRECT ANSWER THAT HAS WORK AND A THX TO SECOND AND CORRECT ANSWER.

sergij07 [2.7K]

Answer:

3.9 - C

Step-by-step explanation:

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This gives you the answer 3.91.

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3 years ago

Kamal wrote the augmented matrix below to represent a system of equations

ra1l [238]

Consider the operation is $R_2\to -3R_2$ .

Given:

The augmented matrix below represents a system of equations.

$\left[\left.\begin{matrix}1&0&1\\1&3&-1\\3&2&0\end{matrix}\right|\begin{matrix}-1\\-9\\-2\end{matrix}\right]$

To find:

Matrix results from the operation $R_2\to -3R_2$ .

Step-by-step explanation:

We have,

$\left[\left.\begin{matrix}1&0&1\\1&3&-1\\3&2&0\end{matrix}\right|\begin{matrix}-1\\-9\\-2\end{matrix}\right]$

After applying $R_2\to -3R_2$ , we get

$\left[\left.\begin{matrix}1&0&1\\-3(1)&-3(3)&-3(-1)\\3&2&0\end{matrix}\right|\begin{matrix}-1\\-3(-9)\\-2\end{matrix}\right]$

$\left[\left.\begin{matrix}1&0&1\\-3&-9&3\\3&2&0\end{matrix}\right|\begin{matrix}-1\\27\\-2\end{matrix}\right]$

Therefore, the correct option is A.

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3 years ago

Write an expression that is equivalent to the following expression by factoring out the GCF 16y+18m

VikaD [51]

Answer:

2(8y+9m)

Step-by-step explanation:

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3 years ago

The perimeter of a rectangular house is 122fr the width is 5ft less than the length find the length and width

Step2247 [10]

Hello,

Let's w the width , l the length, p the perimeter.

w=l-5
p=2(l+w)=2(l+l-5)=4l-10

4l-10=122
==>4l=122+10
==>4l=132
==>l=132/4
==>l=33
So w=33-5=28

Proof:
2*(33+28)=2*61=122

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2 years ago

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vladimir2022 [97]

No second equation provided.

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3 years ago

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