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3 years ago

Solve 2-3x=-x-8 i need help on this question i cant solve this

Mathematics

1 answer:

Nikitich [7]3 years ago

4 0

Answer:

$x=5$

Step-by-step explanation:

We start by adding $3x$ to both sides, giving $2-3x+3x=-x+3x-8$ , which after simplifying gives $2=2x-8$ .

We then add $8$ to both sides, giving $2+8=2x-8+8$ , which after simplifying gives $10=2x$ .

We can then divide both sides by $2$ , giving $10/2=2x/2$ , which after simplifying gives $5=x$ , or $x=5$ . So, x is 5.

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What’s the answer? A. B. C. D.

Semenov [28]

Answer:

b.16

Step-by-step explanation:

4 units on each side so 4x4 is 16

7 0

3 years ago

Read 2 more answers

) An engineer deploys a set of sensors. Each sensor reports its location as a point in two-dimensional space. The points are (2,

r-ruslan [8.4K]

Answer:

The polygon area is $51.5 U^{2}$

Step-by-step explanation:

Points:

(2,7), (8,2), (6,11), (6,5), (11,6)

1. The area of the polygon could be calculate with the eqation:

$A=\frac{1}{2}\left[\begin{array}{ccc}x_{1} &y_{1}\\x_{2} &y_{2}\\x_{3} &y_{3}\\x_{4} &y_{4}\\x_{5} &y_{5}\end{array}\right]$

2. Replace the coordinates in equation for A:

$A=\frac{1}{2}\left[\begin{array}{ccc}2&7}\\8&2\\6&11\\6&5\\11&6\end{array}\right]$

3. Solve the determinant, and calculate A:

$A=\frac{1}{2}\left[\begin{array}{ccc}2&7}\\8&2\\6&11\\6&5\\11&6\end{array}\right]\\A=\frac{1}{2}[(6)(7)+(11)(11)+(8)(6)+(6)(2)]-[(2)(11)+(6)(6)+(11)(2)+(8)(5)]\\A=\frac{1}{2}[42+121+48+12]-[22+36+22+40]\\A=\frac{1}{2}[223]-[120]\\\\A=\frac{1}{2}[103]=51,5 U^{2}$

The polygon area is $51.5 U^{2}$

8 0

4 years ago

A small college needs two additional faculty members: a chemist and a statistician. There are five applicants for the chemistry

Mrac [35]

Answer:

15 ways

Step-by-step explanation:

The events "choosing one out of 5 chemists" and "choosing one out of 3 statisticians" are independent, and, therefore, the number of ways that both positions can be filled is determined by the product of the number of ways that each event can occur:

$n=3*5 =15\ ways$