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
Varvara68 [4.7K]
2 years ago
6

0.7 (3s + 4)-1.1s = 7.9

Mathematics
2 answers:
Sergio039 [100]2 years ago
5 0
First multiply 0.7 by (3s+4) to get 2.1s + 2.8 and then add the 1.1s to the 2.1s and that should leave you with 1s+2.8 now you should have 1s + 2.8 = 7.9, you want to take 2.8 from both sides to bring it over to the 7.9 to make it look like 1s = 7.9 - 2.8 so now go ahead and have the 7.9 and the 2.8 subtract so you should end up with 1s = 5.1 so now you want to divide both sides by 1 and the 1s would cancel out into s and the 5.1 stays the same so now you have s = 5.1, you can always check this answer by seeing that it works so here is how you do that. Plug in your number, so you have
0.7 (3 * 5.1+4) - 1.1 * 5.1 = 7.9
here is your verification, 0.7 multiplied by all the numbers in the parentheses (3 * 5.1+4) would get you with 10.71 + 28 and you have - 1.1 * 5.1 = 7.9 so now just add the 10.71 to the 2.8 to get 13.51 and multiply the 1.1 by the 5.1 to get 5.61 and subtract the two to get 7.9 and that’s 7.9 = 7.9 so I hope this was helpful!! ^_^
vichka [17]2 years ago
3 0

Answer:

s = 5.1

Step-by-step explanation:

0.7 (3s + 4)-1.1s = 7.9\\

Multiply both sides of the equation by 10

0.7\left(3s+4\right)\cdot \:10-1.1s\cdot \:10=7.9\cdot \:10\\\\= 7\left(3s+4\right)-11s=79\\

Expand

\mathrm{Expand\:}7\left(3s+4\right)-11s:\\\quad 10s+28

Subtract 28 from both sides

10s+28-28=79-28

Simplify

10s=51

Divide both sides of the equation by 10

\frac{10s}{10}=\frac{51}{10}

Simplify

s=\frac{51}{10}\\\\Decimal = 5.1

You might be interested in
If the perimeter of a square is 236 inches, how long is each side?
Degger [83]

Answer:

59 inches

Step-by-step explanation:

a square has 4 equal sides

if the sum of all sides(perimeter) is 236 you can do the inverse of that and divide by 4

so your answer should be 59

5 0
3 years ago
Read 2 more answers
One-half of the sum of 3 times v and twenty-eight
DIA [1.3K]

Answer:

(1/2)(3v+28)

Step-by-step explanation:

of= multiply

sum= add

5 0
3 years ago
Read 2 more answers
What value of x satisfies the equation x + 3 = -(x + 1)? a. x = 8
ludmilkaskok [199]

Answer:

-2

Step-by-step explanation:

x + 3 = -(x + 1)

open the bracket

x + 3 = -x -1

x+x= -1-3

2x= -4

X = -4/2= -2

8 0
3 years ago
help me plsss ths is ver confusing to me and i do not get it i dont want to get an f on this test........so can some one plss he
lisabon 2012 [21]

Answer:

<h2>see the answers</h2>

Step-by-step explanation:

<h3>to understand this</h3><h3>you need to know about:</h3>
  • fraction
<h3>let's solve:</h3>
  • to determine the length we have to divide 22 by 3

let's do:

  1. \frac{22}{3}  \\ =  7 \frac{1}{3}  \: feet \:

let's the pieces be p

according to the question

  1. \sf 3p =   22  \\
  2. \sf divide \: bot h \: sides \: by \: 3 :  \\  \sf  \frac{3p}{3}  =  \frac{22}{3}  \\ p =  7\frac{1}{3}

5 0
2 years ago
Suppose that G(x) = F(x + 9). Which statement best compares the graph of
Charra [1.4K]

C. The graph of G(x) is the graph of F(x) shifted 9 units to the left.

Inside changes do the opposite of what they seem like they'd do.  "x+9" shifts it left 9 units.

3 0
2 years ago
Other questions:
  • The formula to convert F° to C° is C = 5/9(F-32). Convert 50°C to °F.
    5·2 answers
  • 52 = 1/2* (190 - 2x)
    14·1 answer
  • During the first part of a hike, Andre drank 1.5 liters of the water he brought. If this 50% of the water he brought, how much d
    13·2 answers
  • Help with inscribed polygons. Me and my daughter do not understand this.
    8·1 answer
  • 5 is 20 percent of what
    14·2 answers
  • NEED HELP IM ON A TIMED TEST
    14·1 answer
  • What is the value of x?<br><br><br><br> Enter your answer in the box.<br> x =<br> ​​
    13·1 answer
  • What is Quantum theory?
    7·1 answer
  • Na função definida por f(x)= 3x²-5x+6 seu gráfico é uma:
    7·1 answer
  • Item 3
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!