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
evablogger [386]
3 years ago
8

2x + y = 10

Mathematics
1 answer:
Elza [17]3 years ago
8 0
  • Answer:

<em>3x - y = 5</em>

  • Step-by-step explanation:

<em>2x + y = 10  | ×2</em>

<em>x - 2y = -5</em>

<em />

<em>4x + 2y = 20</em>

<em>x - 2y = -5</em>

<em>add</em>

<em>4x + x + 2y - 2y = 20 - 5</em>

<em>5x = 15</em>

<em>x = 15 : 5</em>

<em>x = 3</em>

<em>replace x</em>

<em>4(3) + 2y = 20</em>

<em>12 + 2y = 20</em>

<em>2y = 8</em>

<em>y = 8 : 2</em>

<em>y = 4</em>

3x - y =

= 3(3) - 4

= 9 - 4

= 5

You might be interested in
In the triangle above, the cosine of a is 0.8.What is sine of b?
Natalka [10]

Answer:

sin b = 0.8

Step-by-step explanation:

Since a and b are complementary angles , then

sin b = cos a = 0.8

5 0
3 years ago
Anyone? will mark you as brainlist
scoray [572]

Answer:

true

Step-by-step explanation:

5 0
3 years ago
1.6 × 1.6 × 1.6 × 1.6
beks73 [17]

1.6 × 1.6 × 1.6 × 1.6 = 6.5536

3 0
3 years ago
1) 1. What is the vertex of the graph of the function f(x) = x2 – 8x + 5?
pickupchik [31]
Answer:
(4,-11)
Explanation:
5 0
3 years ago
Read 2 more answers
The price P of a good and the quality Q of a good are linked.
Irina-Kira [14]

the equilibrium point, is when Demand = Supply, namely, when the amount of "Q"uantity demanded by customers is the same as the Quantity supplied by vendors.

That occurs when both of these equations are equal to each other.

let's do away with the denominators, by multiplying both sides by the LCD of all fractions, in this case, 12.


\bf \stackrel{\textit{Supply}}{-\cfrac{3}{4}Q+35}~~=~~\stackrel{\textit{Demand}}{\cfrac{2}{3}Q+1}\implies \stackrel{\textit{multiplying by 12}}{12\left( -\cfrac{3}{4}Q+35 \right)=12\left( \cfrac{2}{3}Q+1 \right)} \\\\\\ -9Q+420=8Q+12\implies 408=17Q\implies \cfrac{408}{17}=Q\implies \boxed{24=Q} \\\\\\ \stackrel{\textit{using the found Q in the Demand equation}}{P=\cfrac{2}{3}(24)+1}\implies P=16+1\implies \boxed{P=17} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill \stackrel{Equilibrium}{(24,17)}~\hfill



3 0
3 years ago
Other questions:
  • Need help the second one is wrong (answer)I think !!!! Please help
    5·1 answer
  • Which expression correctly represents “eight times the difference of four and a number”? 8 (n minus 4) 8 (4 minus n) 8 (n) minus
    12·1 answer
  • ABCD is a parallelogram. Find the values of x and y. Solve for the value of z, if z=x−y.
    12·1 answer
  • Sam takes a taxi in Chicago. The taxi charges $0.75 per mile and a flat fee of $1.60. If he has at most 10 dollars
    7·1 answer
  • Write, in slope intercept form, the equation of the line that passes through (8, -9) and has a slope of -5/4.
    15·1 answer
  • The decimal 5.2323… is a(n) _____number.<br><br> rational<br> irrational<br> integer<br> whole
    10·2 answers
  • Alyssa is a waitress at a restaurant. Each day she works, Alyssa will make a
    11·1 answer
  • Need help please!!!!
    7·1 answer
  • Pls help........................
    7·2 answers
  • How to use pythagorean theorem to find isosceles triangle side lengths.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!