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
Lyrx [107]
3 years ago
15

Solving systems by substitution: Y=4x-17 4x+6y=10

Mathematics
2 answers:
sergey [27]3 years ago
5 0
It's not a multiple choice answer is it?
Ksivusya [100]3 years ago
4 0

Answer:

{x = 4, y = -1


Step-by-step explanation:

Solve the following system: by substitution:

{y = 4 x - 17


{4 x + 6 y = 10



Hint: | Perform a substitution.


Substitute y = 4 x - 17 into the second equation:


{y = 4 x - 17


{4 x + 6 (4 x - 17) = 10



Hint: | Expand the left hand side of the equation 4 x + 6 (4 x - 17) = 10.


4 x + 6 (4 x - 17) = (24 x - 102) + 4 x = 28 x - 102:


{y = 4 x - 17


{28 x - 102 = 10



Hint: | Choose an equation and a variable to solve for.


In the second equation, look to solve for x:


{y = 4 x - 17


{28 x - 102 = 10



Hint: | Isolate terms with x to the left hand side.


Add 102 to both sides:


{y = 4 x - 17


{28 x = 112



Hint: | Solve for x.


Divide both sides by 28:


{y = 4 x - 17


{x = 4



Hint: | Perform a back substitution.


Substitute x = 4 into the first equation:


{y = -1


{x = 4



Hint: | Sort results.


Collect results in alphabetical order:


Answer: {x = 4

, y = -1


You might be interested in
4 + 2x - 7 = 12<br><br> ?????
Rainbow [258]

Answer:

15/2

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
If p is a polynomial show that lim x→ap(x)=p(a
Lostsunrise [7]

Let p(x) be a polynomial, and suppose that a is any real number. Prove that

lim x→a p(x) = p(a) .

 

Solution. Notice that

 

2(−1)4 − 3(−1)3 − 4(−1)2 − (−1) − 1 = 1 .

 

So x − (−1) must divide 2x^4 − 3x^3 − 4x^2 − x − 2. Do polynomial long division to get 2x^4 − 3x^3 − 4x^2 – x – 2 / (x − (−1)) = 2x^3 − 5x^2 + x – 2.

 

Let ε > 0. Set δ = min{ ε/40 , 1}. Let x be a real number such that 0 < |x−(−1)| < δ. Then |x + 1| < ε/40 . Also, |x + 1| < 1, so −2 < x < 0. In particular |x| < 2. So

 

|2x^3 − 5x^2 + x − 2| ≤ |2x^3 | + | − 5x^2 | + |x| + | − 2|

= 2|x|^3 + 5|x|^2 + |x| + 2

< 2(2)^3 + 5(2)^2 + (2) + 2

= 40

 

Thus, |2x^4 − 3x^3 − 4x^2 − x − 2| = |x + 1| · |2x^3 − 5x^2 + x − 2| < ε/40 · 40 = ε.

3 0
3 years ago
Given the figure below, find the values of x and z.
bulgar [2K]

Answer:

x = 12

z = 101

Step-by-step explanation:

Hello There!

First lets find z

Well the angle that has a measure of 79 degrees and angle z are supplementary angles meaning that the sum of the two is 180

So we can find the missing angle by subtract the given angle (79 in this case) from 180

180 - 79 = 101 so z = 101

Now lets find x

The angle that has a measure of 79 degrees and the angle labeled (6x+7) are vertical angles

If you didn't know vertical angles are congruent

That being said lets create an equation to solve for x

79 = 6x + 7

now we solve for x

step 1 subtract 7 from each side by

7 - 7 cancels out

79 - 7 = 72

now we have 72 = 6x

step 2 divide each side by 6

72/6=12

6x/6=x

we're left with x = 12

5 0
2 years ago
Mr. Dawson owns multiple fish breeding farms. The number of fish breeding farms is represented by the function f(x) = 5. The app
Ilya [14]
For this case what we must do is define h (x), which is given by:
 h (x) = f (x) * g (x)
 Where,
 f (x) = 5 (The number of fish breeding farms)
 g (x) = 80 (1.04) ^ x (The approximate number of fish per breeding farm)
 Substituting we have:
 h (x) = (5) * (80 (1.04) ^ x)
 Rewriting we have:
 h (x) = 400 (1.04) ^ x
 Answer:
 
the approximate population of the fish across all Mr. Dawson's farms after x months is:
 
h (x) = 400 (1.04) ^ x
7 0
3 years ago
Use the distance formula to find the perimeter. Round to the nearest tenth.
Ierofanga [76]

Answer:

37.6 units

Step-by-step explanation:

Perimeter = sum of all sides of the triangle

To find the sum, find the distance between each points.

✔️Distance between points (-7, 6) and (5, -4):

d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} =

= \sqrt{(5 - (-7))^2 + (-4 - 6)^2}

= \sqrt{(12)^2 + (-10)^2}

= \sqrt{144 + 100}

= \sqrt{244} = 15.6 units (nearest tenth)

✔️Distance between (-7, 6) and (-7, -4):

|6 -(-4)| = 10 units

✔️Distance between (-7, -4) and (5, -4)

|-7 - 5| = 12 units

✔️ Perimeter = 15.6 + 10 + 12 = 37.6 units

6 0
2 years ago
Other questions:
  • X+y/x-y=1/2 solve for y
    10·2 answers
  • A square pyramid has a base side length of 20.4 cm and a height of 18.2 cm. Which square pyramid is similar?
    11·1 answer
  • PLS HELP! THIS IS DUE IN 30 MINUTES!! I'LL GIVE BRAINLIEST AND 60 POINTS IN TOTAL IF U GET BRAINLIEST.
    12·1 answer
  • How many meters are in 1259 centimeters?
    11·1 answer
  • Lee watches TV for 2 hours per day. During that time, the TV consumes 150 watts per hour. Electricity costs (12 cents)/(1 kilowa
    6·1 answer
  • Janae has a soap bottle that has $474$ mL of liquid soap. Each push of the pump uses $8$ mL of soap. There needs to be at least
    11·1 answer
  • An airplane began its descent when it was 0.6 mile above the ground and 15 miles away from an airport, as shown in the diagram b
    11·1 answer
  • Jordan is starting to save $150 to buy a new cell phone. In December, he saved $5. In January, he plans twice as much as he did
    7·2 answers
  • Sandra saves 10% of her salary for retirement. This year her salary was $2,000 more than in the previous year, and she saved $4,
    8·2 answers
  • An ellipse has a center at the origin, a vertex along the major axis at (10, 0), and a focus at (8, 0).
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!