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
lidiya [134]
2 years ago
15

Please help please help please help

Mathematics
1 answer:
Elena-2011 [213]2 years ago
6 0

Answer:

b

Step-by-step explanation:

You might be interested in
I don't understand the substitution method?
liq [111]
It depends on what variable you are tying to solve for first. Say you are trying to solve for x first and then y on the first problem you wrote.

In substitution you solve one of the equations for example with
6x+2y=-10
2x+2y=-10
you solve 2x+2y=-10 for x

2x+2y=-10
-2y = -2y (what you do to one side of the = you do to the other)
2x=-10-2y (to get the variable by its self you divide the # and the variable)
/2=/2 (-10/2=-5 and -2y/2= -y or -1y, they are the same either way)
x=-5-y

now you put that in your original equation that you didn't solve for:
6(-5-y)+2y=-10 solve for that
-30-6y+2y=-10 combine like terms
-30-4y=-10 get the y alone and to do this you first get the -30 away from it
+30=+30
-4y=20 divide the -4 from each side
/-4=/-4 (20/-4=-5)
y=-5

now the equation you previously solved for x can be solved for y.
x=-5-y
x=-5-(-5) a minus parenthesis negative -(- gives you a positive
-5+5=0
x=0

and now we have solved the problem. x=0 and y=-5

6 0
3 years ago
PLS HELP ME I CANT DO IT AND JMBEING TIMED
tamaranim1 [39]

Answer:

For A+B

a. 0.3+0.8 = 1.1

b. 1.2+1.4 = 2.6

c. 3.4 + 4.2 = 7.6

d. 2.25 + 2.95 = 5.20

For B-A

a. 0.8-0.3 = 0.5

b. 1.4-1.2 = 0.2

c. 4.2-3.4 = 1.2

d. 2.95-2.25 = .070

8 0
2 years ago
AB is perpendicular to CD. How many 90 degree angles are formed by the intersection
Alex73 [517]
It should be 4 90°angles
8 0
3 years ago
Read 2 more answers
Please help me solve question 1.
Andru [333]

Answer:

630

Step-by-step explanation:

4 0
3 years ago
A plant grew 1/8 in in the first week of the month and 5/8 in the rest of the month how much did the plant grow for the entire m
Ann [662]
6/8 , just add both fractions together for the total, as they already have common denominators. 
4 0
3 years ago
Other questions:
  • What expression is the factored form of 2/3x+4
    10·2 answers
  • The opera theater manager believes that 27'% of the opera tickets for tonight's show have been sold. If the manager is right, wh
    9·1 answer
  • How do you write y-5 =3(x-4) in slope-intercept form?
    11·2 answers
  • Simplify the following expression:<br><br> -5a⁷ b⁻³ • 4a⁻⁶ b⁶
    5·2 answers
  • I need this homework
    9·1 answer
  • Rick has 76.8 feet of cable she planas to Cable It into 7 pieces how long is each piece
    15·1 answer
  • What numbers fall between -0.26 and -0.27
    11·1 answer
  • Do you have 135$ in a savings account and save $12 per week your friend has $95 in a savings account and save $20 per week how m
    10·1 answer
  • The Drama Club ordered 16 pizzas for a party. Each pizza had 6 slices. Mai ate 7 of the slices. How many slices were left for th
    7·1 answer
  • 50 POINTS MARKING BRAINLEIST PLS ANSWER ASAP
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!