1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lina2011 [118]
2 years ago
7

Решите уравнение 6x-4(x+5)=2,2

Mathematics
1 answer:
Tems11 [23]2 years ago
6 0

Answer:

x=11.1

Step-by-step explanation:

6x-4x-20=2.2

2x-20=2.2

2x=22.2

x=11.1

You might be interested in
How many significant figures does 0290<br> have?
docker41 [41]
Two significant figures.
The trailing zero is not significant
7 0
3 years ago
Write this expression in standard form by collecting like terms:
ExtremeBDS [4]

9 (a - b) + 5 (2a - 2b)

mutiply the first bracket by 9

(9)(a)= 9a

(9)(-b)= -9b

mutiply the second bracket by 5

(5)(2a)=10a

(5)(-2b)= -10b

9a-9b+10a-10b

9a+10a-9b-10b ( combine like terms<em>)</em>

Answer : C. 19a - 19b

5 0
3 years ago
I need the (rate of change____, so the rock is falling___meters per sec) (the initial value,the initial hight)
stepladder [879]

Answer:

- 6 m/s

Step-by-step explanation:

The rate of change is a measure of the slope and can be calculated using the slope formula

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = (2, 78) and (x₂, y₂ ) = (10, 30) ← 2 points on the line

m = \frac{30-78}{10-2} = \frac{-48}{8} = - 6

Rate of change is - 6 m/s

5 0
3 years ago
Find the slope of (17,11)(5,0)
Bad White [126]

Answer:

m= 11/ 12

Step-by-step explanation:

hope that really helps

3 0
3 years ago
Read 2 more answers
X^2+4x+y^2-10y+20=30 find the center of the circle by completing the square
swat32

Answer:

a). Center of the circle = (-2, 5)

b). Equation of the line ⇒ y = -\frac{4}{5}x+\frac{58}{5}

Step-by-step explanation:

Equation of the circle is,

x² + 4x + y²- 10y + 20 = 30

a). [x² + 2(2)x + 4 - 4] + [y²- 2(5)y + 25] - 25 + 20 = 30

   [x² + 2(2)x + 4] - 4 + [y² - 2(5)y + 25] - 25 + 20 = 30

   (x + 2)² + (y - 5)²- 29 + 20 = 30

   (x + 2)² + (y - 5)²- 9 = 30

   (x + 2)² + (y - 5)² = 39

By comparing this equation with the standard equation of a circle,

    Center of the circle is (-2, 5).

b). A point (2, 10) lies on this circle.

    Slope of the line joining this point to the center (-2, 5),

    m_{1}=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}

          = \frac{10-5}{2+2}

          = \frac{5}{4}

    Let the slope of the tangent which is perpendicular to this line is 'm_{2}'

    Then by the property of perpendicular lines,

          m_{1}\times m_{2}=-1

          \frac{5}{4}\times m_{2}=-1

                 m_{2}=-\frac{4}{5}

   Now the equation of the line passing though (2, 10) having slope m_{2}=-\frac{4}{5}

           y - y' = m_{2}(x-x')

           y - 10 = -\frac{4}{5}(x-2)

           y - 10 = -\frac{4}{5}x+\frac{8}{5}

                  y = -\frac{4}{5}x+\frac{8}{5}+10

                  y = -\frac{4}{5}x+\frac{58}{5}

Therefore, equation of the line will be, y = -\frac{4}{5}x+\frac{58}{5}

7 0
3 years ago
Other questions:
  • members of the garner high school yearbook committe need to but 1,344 student photos on 24 pages in the yearbook. They want to p
    6·1 answer
  • Devon has 14 steel balls of equal weight. If he puts 8 of them in one pan of a balance, and the rest along with a weight of 20 g
    8·2 answers
  • LOTS OF POINTS! WILL GIVE BRAINIEST. <br> (no spam plz)<br> How would I answer these?
    15·2 answers
  • Round 8015.80930968 to the nearest ten.
    9·2 answers
  • I need help with this please. I don’t understand how to do this
    12·1 answer
  • In a random sample of five mobile​ devices, the mean repair cost was ​$90.00 and the standard deviation was ​$14.00. Assume the
    15·1 answer
  • Please help ( question 9)<br> tyyyyy
    6·1 answer
  • Can someone plz help meee I’m in need I will love you forever!!! I just need help with the last bottom 3
    5·1 answer
  • PLSSSSS HELPPP PLSSSSSSSSS PLS I NEED HELPP
    10·2 answers
  • Which inequality matches the graph?<br> A) x &lt; -1<br>B) x &gt; -1 <br>C) × = 1<br>D) x &lt; -1​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!