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
Firdavs [7]
3 years ago
14

Solve each substitution ( I need help )

Mathematics
1 answer:
lozanna [386]3 years ago
5 0
In each of the problems, one of the equations is solved for y. Just plug in what y is equal to into the other equation.

1.) Plug -3 in for y.
-3 = 7x - 10
7x = 7
x = 1

2.) Plug -8 in for y.
-8 = -2x - 12
-2x = 4
x = -2

9.) Plug -8x in for y.
2x + 4(-8x) = 0
2x - 32x = 0
-30x = 0
x = 0

10.) Plug 2x in for y.
6x + 7(2x) = 20
6x + 14x = 20
20x = 20
x = 1


You might be interested in
Online banking is safest when you use your home computer-yes or no?
Mars2501 [29]

Answer:

Yes

Yes

No

Explanation:

<u>It is important to use your own personal computer when banking online. </u><em>Using public computers put your information at risk.</em> For example, your browser history can be easily retrieved by others when using public computers, so this allows them to access your bank account information or your password.

Financial institutions use "encryption" technology in order to ensure that a person's information will remain confidential. <u>This technology prevents your information from being deciphered.</u>

You can pay bills with online banking and this is very common nowadays. People usually pay their electricity bill, internet bill and online purchases through online banking.

5 0
3 years ago
The measure of each of the base angles of an isosceles triangle is 9° less than 4 times the measure of the vertex angle. Plz exp
valentinak56 [21]
Isocoleese means that 2 sides are the same legnth
that also means that 2 angles are the same legnth
so represent the angles as x,y,z
the vertex is the different angle
lets says that x=y because they are the 2 same angle and z=vertex
so just do
the angles measure x,x,z because x=y
so
base angle=x=y
remember that all 3 inside angles added together equals 180 so
x+y+z=180 or x+x+z=180
so we have

measure of each of the base angles of the isosolese triangle is 9 les than 4 times the vertex
that means that x is 9 less than 4 times z or x=-9+4z or x=4z-9
so we have the other equation
x+x+z=180
subsitute 4z-9 for x
4z-9+4z-9+z=180
group like terms
4z+4z+z-9-9=180
add like terms
9z-18=180
add 18 to both sides
9z=198
divide both sides by 9
z=22
subsitute
x=4z-9
x=4(22)-9
x=88-9
x=79

x=y=79


the angles are
base angles=79 degrees
vertex=22 degrees


x=79
y=79
z=22


7 0
4 years ago
Relationship B has a lesser rate than Relationship A. The graph represents Relationship A.
hram777 [196]

Table B could represent Relationship B

 

Time (weeks) 3 4 6 9

Plant growth (in.) 0.9 1.2 1.8 2.7

 

The correct answer between all the choices given is the second choice or letter B. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

3 0
3 years ago
Read 2 more answers
Someone anyone please
Lisa [10]

Answer:

9 or 3^2

Step-by-step explanation:

3^3×3^3=729

3^4=81

729/81 = 9 = 3^2

5 0
3 years ago
Please help me and hurry thx
MrRissso [65]

Answer:

10 percent chance because there's 10 tiles in total and percentages have to add up to 100

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • How do I graph the function y = 2x + 5
    6·1 answer
  • What is the value of 1/4 ÷ 8?
    5·1 answer
  • 0.85+(-2.4)+4.5 help plz
    13·1 answer
  • 1% of what number is 7
    6·1 answer
  • Need help with this algebra problem 15 points will give brainiest if right
    15·2 answers
  • Can someone do this? You invest $6000 today. What interest rate is needed to have $8000 in 4 years if
    13·1 answer
  • (Isosceles Triangle)<br> 7x +3<br> 5x + 7<br> С<br> 10<br> ==[blank1]
    12·1 answer
  • Find the area of the figure. pi = 3.14 :) THANKS
    11·2 answers
  • Find the range of the data.
    11·1 answer
  • PLEASE HELP! FIFTEEN BRAIN POINTS :D
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!