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olchik [2.2K]
3 years ago
12

For the expression, combine like terms and write an equivalent expression 3 points

Mathematics
1 answer:
Simora [160]3 years ago
4 0

Answer:

5+7x

Step-by-step explanation:

1/2(6-4x) +2 +9x

3-2x+2+9x

5+7x

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Please answer both questions and show all your work. Thank you!!! :)
nignag [31]

(1) let "r" denote number of rabbits, "c"  number of chickens

Set up the equations:

r + c = 1000\\4r + 2c = 3150\\\\-2r -2c = -2000\\4r + 2c = 3150\\\\2r = 1150\implies r = 575\implies c = 425

Answer: There are 575 rabbits and 425 chickens

(2) m - number of Mike's stamps, a - number of Andrew's stamps.

Set up equations:

m = 4a\\m-8 = 2(a+8)\\\\4a-8=2a + 16\\2a = 24\implies a = 12\implies m = 48\\

Answer:  Mike has 48 stamps. Andrew has 12 stamps.

4 0
3 years ago
Read 2 more answers
PLEASE I ONLY HAVE 30 MIUNUTES TO FINISH!!!!!!!!!!!!!
creativ13 [48]

Answer:

When it is small & when the sample has things that are different from the population.

Step-by-step explanation:

A small sample has less chance of accurately reflecting a population & too many variables can also negatively influence the study.

3 0
3 years ago
Read 2 more answers
19. Calculate the size of the angle marked x in the diagram.
algol [13]

Answer:

151°

Step-by-step explanation:

126°+221°+95°+57°+70+x=720° ( sum of interior angles of hexagon)

x + 569° =720°

x = 720°- 569°

=151°

7 0
3 years ago
Read 2 more answers
(−t 4 −5t 3 −10t 2 )+(9t 3 +3t 2 −1)
klemol [59]

Answer:

\left(-t^4-5t^3-10t^2\right)+\left(9t^3+3t^2-1\right)=-t^4+4t^3-7t^2-1

Step-by-step explanation:

Given the expression

\left(-t^4\:-5t^3\:-10t^2\:\right)+\left(9t^3\:+3t^2\:-1\right)

Remove parentheses:  (a)=a

=-t^4-5t^3-10t^2+9t^3+3t^2-1

Group like terms

=-t^4-5t^3+9t^3-10t^2+3t^2-1

Add similar elements        

=-t^4-5t^3+9t^3-7t^2-1         ∵ -10t^2+3t^2=-7t^2

Add similar elements        

=-t^4+4t^3-7t^2-1                  ∵  -5t^3+9t^3=4t^3

Thus, the equivalent expression in simplified form:

\left(-t^4-5t^3-10t^2\right)+\left(9t^3+3t^2-1\right)=-t^4+4t^3-7t^2-1

4 0
3 years ago
PLEASE HELP ME!!!!!!!!!!! WILL GIVE BRAINLIEST AND RATING!!!!!!!!!!!!
Kitty [74]
This will give us
2n-1-(-7n+2)=2n-1+7n-2=9n-3
That is the second option.
Please mark me as brainliest.
4 0
3 years ago
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