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
noname [10]
3 years ago
6

Solve the system by substitution. Check your solution.

Mathematics
1 answer:
Zepler [3.9K]3 years ago
3 0

Answer:

a.  (15, 15)

Step-by-step explanation:

We start with those two equations:

1) a - 1.2b = -3

2) 0.2b + 0.6a = 12

We'll begin by modifying equation #1 to isolate a:

a = -3 + 1.2b

Then we'll use this value for a in the second equation:

0.2b + 0.6 (-3 + 1.2b) = 12

0.2b - 1.8 + 0.72b = 12

0.92b = 13.8

b = 15

Then we'll place that value of b in the first equation to find a:

a - 1.2 (15) = -3

a - 18 = -3

a = 15

You might be interested in
Find area of triangle whose base is 2 √3 and height is 3 √3
Lera25 [3.4K]
Area of a triangle = base times height
A = 2√3 times 3√3
A = 18
The answer is 18
Hope that helps
7 0
3 years ago
The gcf of two numbers less than or equal to 12 is 2. Their LCM is 20.What are the numbers?
bixtya [17]

We know:

LCM(a,\ b)=\dfrac{ab}{GCF(a,\ b)}

We have

GCF(a,\ b)=2,\ LCM(a,\ b)=20,\ a\leq12,\ b\leq12

Substitute:

20=\dfrac{ab}{2}\qquad|\cdot2\\\\ab=40

40=1\cdot40=2\cdot20=4\cdot10=5\cdot8

Only 4 and 10 meet the requirements of the question.

--------------------------------------------------------------------

40 and 1 NOT, because 40 > 12

20 and 2 NOT, because 20 > 12

5 and 8 NOT because GCF(5, 8) = 1

5 0
3 years ago
What is 7.03 as a mixed number or fraction in simplest form​
Alona [7]
7.03 can be converted to 7 3/100.

.03 is the equivalent to 3 hundredths, we know this because it in the hundredths place.
5 0
3 years ago
Which type of parent function is f(x) = |x|?
mariarad [96]
The absolute value parent function.
5 0
3 years ago
Explain the effect f (x)+k has on the graph if the exponential function f (x) Be specific and use complete sentences for full cr
Masteriza [31]
The +k part of the function takes the original function and translates it straight up k units. It's as simple as that.  If your function is the line f(x) = 3x, then the function f(x) = 3x + 4 moves that first function up 4 units.
7 0
3 years ago
Other questions:
  • X + (2x + 5) = 3(x – 4)+7
    9·1 answer
  • Math 1 help please! i neeeeeeeeeeed iiiiiiiiiiittttttt!
    7·2 answers
  • 40x8=. Tens x 8 =. Tens =
    14·1 answer
  • The vertices A(-2,-1),B(-3,2) C(-1,3) and D(0,0) form a parallelogram. The vertices A’(-1,-2), B’(2,-3), C(3,-1), and D’(0,0) ar
    6·1 answer
  • express the area A of an isosceles right triangle as a function of the length s of one of its two equal sides.
    9·1 answer
  • Emily has saved $6.75 and $4.25 from her lawn mowing jobs. How much more does she need to save to buy a CD that costs $15.95?
    8·1 answer
  • Meredith needs $399 to buy a tablet computer. She wants
    10·1 answer
  • This negative and positive stuff is really confusing me can anyone please help?
    15·1 answer
  • The ratio of boys to girls at a concert is 13:17. If there are a total of 90 children at the concert, how many boys are at the c
    9·1 answer
  • Please solve<br> -5+(-8) step by step thank you!!
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!