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dusya [7]
3 years ago
10

HELP PLZ WILL GIVE BRAINLIEST

Mathematics
1 answer:
makkiz [27]3 years ago
5 0
I find it easier just to graph this sort of question rather than multiply it all out.

x = 3.5

_____
(x^2 +2x +1) -(x^2 -6x +9) = 20
.. 8x -8 = 20
.. x = 28/8 = 3.5

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16 students are percussionist which is 20% of the students how many students are in band
11Alexandr11 [23.1K]

Answer:

80 Students are in the band class

Step-by-step explanation:

I did this mentally so sorry if it is bad

16 = 20%

+

16 = 20%

= 40% 32 students

40% +40% = 80%

32+ 32 = 64

80+20%

64+16

80 Students are in the band class

5 0
3 years ago
4a+(-8), if a= -2 PLZ ANSWER ASAP
Ugo [173]

Answer:

-16

Step-by-step explanation:

4a+(-8)

4(-2)+(-8)

-8+(-8)

= - 16

6 0
2 years ago
What is the first step to take when solving this linear system of equations by the addition-subtraction method? 2x + 4y = 3 x +
Free_Kalibri [48]

The right answer is Option D.

Step-by-step explanation:

Given equations are;

2x+4y=3    Eqn 1

x+3y=13    Eqn 2

When we use subtraction-addition method, we make one of the variables same with opposite signs so that only one variable remains after addition or subtraction.

In the given problem, we will multiply Eqn 2 with "-2" so that the x variables become equal and then we can add both the equations and solve for y.

Therefore,

The first step will be to multiply the second equation by -2 to solve the linear system of equations.

The right answer is Option D.

Keywords: linear equations, subtraction

Learn more about linear equations at:

  • brainly.com/question/8902155
  • brainly.com/question/8955867

#LearnwithBrainly

5 0
3 years ago
Evaluate [(21 + 6) − 3^2] ÷ 9 ⋅ 2.
Vlada [557]
 [(21 + 6) − 3^2] ÷ 9 ⋅ 2=[(27) − 9] ÷ 9 ⋅ 2
=18 ÷ 9 ⋅ 2
= 2 . 2
= 4
6 0
3 years ago
Read 2 more answers
Find the sum.<br> 7x + 15x=
BaLLatris [955]

Answer:

7x + 15x= 21x

Step-by-step explanation:

7x + 15x

= (7 + 15)x

= 22x

4 0
3 years ago
Read 2 more answers
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