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
lord [1]
3 years ago
7

Solve each system by substitution

Mathematics
1 answer:
Ira Lisetskai [31]3 years ago
4 0

Answer:

1. 2x + 3y =22

y=4

C. (5,4)

2. y=0

-5x - 2y = -15

B. (3,0)

Step-by-step explanation:

2x+(3)(4)=22

Step 1: Simplify both sides of the equation.

2x+12=22

Step 2: Subtract 12 from both sides.

2x+12−12=22−12

2x=10

Step 3: Divide both sides by 2.

2x/2 = 10/2

x=5

====================================================================

−5x−(2)(0)=−15

Step 1: Simplify both sides of the equation.

−5x−(2)(0)=−15

−5x+0=−15

(−5x)+(0)=−15(Combine Like Terms)

−5x=−15

−5x=−15

Step 2: Divide both sides by -5.

−5x/−5 = −15/−5

x=3

You might be interested in
Solve the system <br> x+3y=22 <br> 2x-y=2
saw5 [17]
It will equal (4,6) for x and y
3 0
3 years ago
Read 2 more answers
Abe is buying wrapping paper.
fenix001 [56]

Answer:

So you need to compute all the rates to see which is the best deal.

$1.79/12.5ft^2=$0.1432 per ft^2

$5.29/40ft^2=$0.13225 per ft^2

$8.49/50ft^2=$0.1698 per ft^2

$6/60ft^2=$0.10 per ft^2

So the last option is the cheapes per square foot and thus is the best deal.  Ordered from least to greatest.

Sherbert, blue, red, and green

Step-by-step explanation:

hope this helps

4 0
3 years ago
Read 2 more answers
NEED HELP FAST!!!
mina [271]
Remember

we can do anything to an equation as long as we do it to both sides

try to isolate the variable

you have 2 types
x+b=c
x/b=c

fior the first type, minus b from both sides to get
x=c-b

for the second, multiply both sides by b to get rid of the fraction to get
x=cb

also remember that -x times -1=x



b.add 25 to both sides
-a=20
multiply -1
a=-20


c.
-t/8=-4
multiply both sides by 8
-t=-32
mutiply -1
t=32

d. -n/-5=-30
mulitply both sides by -5
-n=150
multiply both sides by -1
n=-150

e. multiply both sides by 12
-l=144
multiply b y-1
l=-144
4 0
3 years ago
Read 2 more answers
Could anybody help me with this please?
KengaRu [80]
I think the opposite would be a circle because it would have any points.
4 0
3 years ago
Pls help i am on a timer
stich3 [128]

Answer:

x = 1 + \sqrt{2} \ \ or \ 1- \sqrt{2}

Step-by-step explanation:

Given;

x² - 2x - 1 = 0

Solve by completing the square method;

⇒ take the constant to the right hand side of the equation.

x² - 2x = 1

⇒ take half of coefficient of x = ¹/₂ x -2 = -1

⇒ square half of coefficient of x and add it to the both sides of the equation

x^2 +  (-1)^2 = 1 + (-1)^2

(x-1)^2 = 1 + 1\\\\(x-1)^2 = 2\\\\

⇒ take the square root of both sides;

x-1 = +/- \ \ \sqrt{2} \\\\x = 1 + \sqrt{2} \ \ or \ 1- \sqrt{2}

Therefore, option B is the right solution.

3 0
3 years ago
Other questions:
  • What is the slope?? what is the y-intercept
    7·2 answers
  • What is 60-950 in standard form
    5·1 answer
  • What are the next four multiples of the fraction 3/5?
    7·2 answers
  • Find two consecutive whole numbers that square root 86 lies between.
    12·2 answers
  • P)
    8·1 answer
  • What I the value of 1/4x² + 4 when x=4
    8·1 answer
  • 14/15 - 3/5 simplified
    8·1 answer
  • You deposit $5,500 into a saving account that pays an annual interest rate of 5.5% compounded monthly.
    14·1 answer
  • Do the ratios 9:20 and 3:4 form a proportion?
    5·2 answers
  • PLS PLS PLS HELP ME ON THIS MATHHHHH
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!