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
arsen [322]
3 years ago
5

Two equations are given below: a – 3b = 9 a = b – 3 What is the solution to the set of equations in the form (a, b)?

Mathematics
2 answers:
ipn [44]3 years ago
8 0
Use substitution and put b-3 where a is in the first equation
Vilka [71]3 years ago
7 0
A-3b=9
a=b-3

b-3-3b=9
-2b-3=9
-2b=12
2b=-12
b=-6

a=-6-3
a=-9

Solution: (-9,-6)
----
Check: 
-9=-6-3
-9=-9
TRUE


You might be interested in
The reading speed of second grade students in a large city is approximately normal, with a mean of 89 words per minute
laila [671]
Try using
Wolframalpha.com
It can solve any mathematical problem
4 0
3 years ago
Please solve this sheet.
lyudmila [28]
Hello,

A: roots: -1,-3
a point (-2,1)
Vertex=((-2,1)

y=k*(x+1)(x+3) using roots
but k*(-2+1)(-2+3)=1==>k*(-1)*1=1==>k=-1

eq: y=-(x+1)(x+3)
==>y=-(x²+3x+x+3)
==>y=-x²-4x-3
y=k(x+2)²+1 if x=-1,y=0 ==>k*1+1=0==>k=-1
==>y=-(x+2)²+1

Answer :A--> R,K

B)
y=k(x+4)²-2 and k=-1/2
y=-1/2(x+4)²-2
y=-1/2x²-4x-10

answer B--> I,≈W if it is written -1/2*x²  (square has been forgotten)

C:
y=2x²-16x+30
y=2(x-4)²-2
answer : C-->S,J

D:
y=-(x+3)(x+1)
y=-x²-4x-3
=-(x+2)²+1
answer D--> V,L

E:
Here there is a problem: or the graph is wrong, or 2 equations are missing!

y=1(x+1)(x-3) using roots
y=x²-2x-3 ≈ T si it were -2x and not +2x.

y=(x-1)²-4 ≈H is it were -1 in place of +1 [H:y=(x+1)²-4]




6 0
3 years ago
Help meee I’ll give 10 pts and brainliest!!!
crimeas [40]

Step-by-step explanation:

i) \overline{AB} = \sqrt{(x_A - x_B)^2 + (y_A - y_B)^2}

\:\:\:\:\:\:\:=\sqrt{(2)^2 + (12)^2} = 12.3

ii) m = \dfrac{y_A - y_B}{x_A - x_B} = \dfrac{-12}{2} = -6

iii) (\overline{x},\:\overline{y}) = \left(\dfrac{x_A + x_B}{2},\:\dfrac{y_A + y_B}{2}\right)

\:\:\:\:\:\:\:=(3,\:-2)

7 0
3 years ago
5. Please write the equation of a line in y=mx+b format. Find the SLOPE first then find the Y-INTERCEPT (b) Your answer​
castortr0y [4]

Answer:

y = \frac{5}{3}x-1

Step-by-step explanation:

Let the equation of the line is,

y = mx + b

Here m = slope of the line

b = y-intercept

Slope of a line passing through two points (x_1,y_1) and (x_2,y_2) is,

m = \frac{y_2-y_1}{x_2-x_1}

From the graph attached,

Since, the given line passes through (0, -1) and (3, 4),

Slope 'm' = \frac{4+1}{3-0}

m = \frac{5}{3}

y - intercept 'b' = -1

Therefore, equation of the line will be,

y = \frac{5}{3}x-1

5 0
3 years ago
Compare and Contrast: Two equations are listed below. Solve each equation and compare the solutions. Choose the statement that i
Oksana_A [137]

Answer:

equation 2

Step-by-step explanation:

6 0
2 years ago
Other questions:
  • Angels a and b are complementary but angle a is 4 times as large as angle b find angle a
    15·1 answer
  • Electricity City increases the price of televisions by 25%. If a television now sells for
    8·1 answer
  • Francesca is a single mother making $645 per week after taxes. She spends one-third of her money on rent and utilities and puts
    6·1 answer
  • Solving equation P=k+m+n solve for m
    6·1 answer
  • The indicated function y1(x) is a solution of the given differential equation. Use reduction of order or formula below:
    8·1 answer
  • Why is 3x1/10 less than 3x10?
    14·2 answers
  • For an angle with measure x in a right triangle, sin x = 112/113
    5·1 answer
  • Sum of 1/3, 1/5 and 1/6 in simplest form
    9·2 answers
  • PLEASE HELP find the value of x
    15·2 answers
  • HELLPPPPPPPP !!!!!!???
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!