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
jonny [76]
1 year ago
7

If 2a + 7b+2c=16 and 2a + 3b +2c= 8, then b = ? (A)-2 (B) O (C) 2 (D) 4 (E) 6

Mathematics
1 answer:
Sauron [17]1 year ago
5 0

Answer:

  (C)  2

Step-by-step explanation:

Given equations 2a + 7b+2c=16 and 2a + 3b +2c= 8, you want to know the value of b.

<h3>Solution</h3>

The coefficients of 'a' and 'c' are the same in the two equations, so we can eliminate those variables by subtracting one equation from the other. We can keep the resulting coefficient of 'b' positive if we subtract the second equation from the first.

  (2a +7b +2c) -(2a +3b +2c) = (16) -(8)

  4b = 8 . . . . . . . simplify

  b = 2 . . . . . . . divide by 4

You might be interested in
PLS DO THIS I WILL MARK BRAINLYNESS
Lunna [17]

Answer:

3 9/10,64,B,D

Step-by-step explanation:

8 0
3 years ago
Which of the following statements are true for sin (-430°)
stira [4]

Answer:

Step-by-step explanation:

sin(-430)=-sin(430)=-sin(360+70)=-sin 70

8 0
2 years ago
87 ÷ 17 + [672 - 83] another one
never [62]

Answer:

594.1

Step-by-step explanation:

87÷15=5.1

672-83=589

so then you add those to together and get 594.1

3 0
3 years ago
What 5/8x + 1/2 (1/4x + 10)? ​
dedylja [7]
5+3x/4




5x+1/2(1/4+10). Distributive property
5x+x/8+5. Combine like terms
5+3x/4
7 0
2 years ago
Read 2 more answers
It’s probably rlly simple I just dk how to do it :)
Helga [31]

Answer:

18,0

Step-by-step explanation:

By useing desmos, the line has an x intercept of 18 making that the answer.

 

8 0
3 years ago
Read 2 more answers
Other questions:
  • If you vertically compress the absolute value parent function f(x)=lxl, by a factor of 3, what is the equation of the new functi
    11·1 answer
  • Does anyone know the answer what to add and multiply because I really don't get it
    9·2 answers
  • 4 cents per day would be equivalent to how many dollars per year
    6·2 answers
  • Consider the right triangle. A right triangles with side lengths 28 meters and 45 meters. The hypotenuse is unknown. What is the
    10·2 answers
  • Our car has a 15-gallon gas tank. A lower grade of gasoline costs $2.96 per gallon. The premium grade gasoline costs $3.15 per g
    6·2 answers
  • I NEED HELP PLS THIS WAS DUR TWO DAYS AGO
    10·2 answers
  • Need help with this question. I will give Brainliest!
    15·1 answer
  • I need help with this question
    14·2 answers
  • In Denisha's school, 0.826 students participated in a sport. If there are one thousand students in Denisha's school, how many pa
    9·2 answers
  • The jobless rate for Italy in January 2015 was 13.4%. In a random sample of 50 employable adults in one city, 8 were unemployed
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!