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
nadya68 [22]
4 years ago
13

Use the substitution method to solve the system of equations. Choose the

Mathematics
1 answer:
luda_lava [24]4 years ago
7 0

Answer:

(2, 22 )

Step-by-step explanation:

Given the 2 equations

y = 7x + 8 → (1)

y = x + 20 → (2)

Substitute y = 7x + 8 into (2)

7x + 8 = x + 20 ( subtract x from both sides )

6x + 8 = 20 ( subtract 8 from both sides )

6x = 12 ( divide both sides by 6 )

x = 2

Substitute x = 2 in (2) for corresponding value of y

y = x + 20 = 2 + 20 = 22

Solution is (2, 22 )

You might be interested in
Which number line represents the solution set for the inequality 2x - 62 6(x - 2) + 8?
antoniya [11.8K]

Answer:

2x - 6 ≥ 6(x-2) + 8

2x - 6 ≥ 6x - 12 + 8

6x - 2x ≤ - 6 + 4

4x ≤ -2

4x/4 ≤ -2/4

x ≤ -1/2

Interval Notation: (- ∞, -1/2]

The line starts from -1/2 with the arrow going to the left (decreasing). The endpoint or value from where it started, which is -1/2, should be shaded.  The inequality symbol x ≤ -1/2 represents the values at most or maximum -1/2.

Step-by-step explanation:

7 0
3 years ago
How long does it take for an investment to double in value if it is invested at 10​% compounded monthly question mark monthly? 
Margaret [11]
The first step to determining the answer to this item is to calculate for the effective interest using the equation,

                  ieff = (1 + i/m)^m - 1
where ieff is the effective interest, i is the given interest and m is the number of compounding period.


Part A: m in this item is equal to 12.
Substituting,
                ieff = (1 + 0.10/12)^12 - 1 = 0.1047

The amount of money after n years is calculated through the equation,
               An = A(1 + ieff)^n
If An/A = 2 then,
                  2 = (1 + 0.1047)^n
The value of n is 6.96 years

Part B: For the continuously compounding,
               An = Ae^(rt)
           An/A = 2 = e^(0.10t)
The value of t is equal to 6.93 years. 

Hence, the answers:
<em>Part A: 6.96 years</em>
<em>Part B: 6.93 years</em>

7 0
3 years ago
The graph shows the dilation of ΔABC with the origin as its center. Which rule describes this transformation? A) (x, y) → (2x, 2
podryga [215]

<u><em>Note: Since, you have not added the graph. So, I will give you a general overview of the concept of dilation, the understanding of which will make you clear your concept.</em></u>

Step-by-step explanation:

We know that a dilation is the kind of transformation which produces an image which has the same shape as the original object, but having a different size.

Here are some key factors regarding dilation:

  • Enlargement occurs when a dilation does create a larger image.
  • Reduction occurs when a dilation does create a smaller image.
  • A dilation shrinks or stretches the original object.
  • If the scale factor > 1, the image will be a stretch (enlargement)
  • If the scale factor is between 0 and 1, the image will be shrunk (reduction)
  • If the scale factor = 1, the original object and the image will be congruent

Here is the impact of dilation when (x, y) → (2x, 2y):

  • Dilation with scale factor 2, will have the rule as (x, y) → (2x, 2y). The image will be a stretch (enlargement) as the scale factor > 1.
  • The location of the new coordinates of the image can be obtained by multiplying the coordinates of the original figure by 2.

For example, the coordinates of the image of a point A(4, 8) will be A'(2×4, 2×8) or A'(8, 16) after the dilation of scale 2 at the origin.

Here is the impact of dilation when (x, y) → (0.5x, 0.5y):

  • Dilation with scale factor 0.5, will have the rule as (x, y) → (0.5x, 0.5y). The image will be shrunk (reduction) as the scale factor < 1.
  • The location of the new coordinates of the image can be obtained by multiplying the coordinates of the original figure by 0.5.

For example, the coordinates of the image of a point A(4, 8) will be A'(0.5×4, 0.5×8) or A'(2, 4) after the dilation of scale 0.5 at the origin.

Keywords: dilation, transformation, enlargement, reduction

Learn more about dilation from brainly.com/question/13846651

#learnwithBrainly

8 0
4 years ago
A map has a scale of 1 inch to 15 miles . If 2 cities are 3.4 inches apart on the map , what is the actual distance between the
Hatshy [7]
Look at it this way. (x.y x = 10 / y = 1) So, 3 inches straight is 15 * 3 = 45, and the 0.4 would be 45 + 4 = 49. So, 49 should be your answer.

☺♥
4 0
4 years ago
Read 2 more answers
What are the correct answers for these problem's
Maru [420]
The answer is B. About 83 g
4 0
4 years ago
Other questions:
  • What is the probability of obtaining 3 heads and 1 tail (order irrelevant) on four flips of a fair coin?
    8·1 answer
  • A small company did an analysis of their pay scale versus years of experience and found that the line of best fit was y = 2035.6
    9·2 answers
  • Identify an equation in point-slope form for the line parallel to y = x-7 that
    14·1 answer
  • F(x)=2x-1 and g(x)= -x+5 what is the solution of f(x)=g(x)
    6·1 answer
  • What is the complement of an 18 degree angle
    13·1 answer
  • Radius of 40 feet. use 3.14
    13·1 answer
  • I need help with This one
    15·2 answers
  • Mr datu has enough money to pay 8 workers for 15 days if he adds 4 more workers for how long can he pay at the same rate?
    10·1 answer
  • 1<br> What is the solution to the equation 4<br> 1 7 1<br> 8 8*3*?<br> X=-5<br> X=-4<br> X=4<br> x=5
    7·1 answer
  • Find the solution of the system of equations.<br> 2x+5y=-11<br> -8x-5y= -1
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!