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2 years ago

I need help on 25. I know the answer is 2a but I need to see the work. Please help I’ve tried so many possibilities.

Mathematics

2 answers:

valkas [14]2 years ago

7 0

a(2a-3(1-a))+5(a-a^2)

distribute the inner most parenthesis

a( 2a -3+3a))+5(a-a^2)

combine like terms

a(5a-3) +5(a-a^2)

distribute both sets of parenthesis

5a^2 -3a +5a-5a^2

combine like terms

5a^2-5a^2 -3a+5a

mamaluj [8]2 years ago

3 0

Answer:

ans is 2a

Step-by-step explanation:

a[2a-3(1-a)] + 5(a-a^2)

=a{2a-3+3a] + 5a - 5a^2

=a[5a-3] + 5a - 5a^2

=5a^2 - 3a + 5a - 5a^2

=2a

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Please solve. best answer gets rewarded! show step by step.

sukhopar [10]

Hey!

Let's write the problem.
$2x-4-5x=2$
Add like terms...
$-3x-4=2$
Add $4$ to both sides.
$-3x-4+4=2+4$
$-3x=6$
Divide both sides by $-3$ .
$\frac{-3x}{-3}=\frac{6}{-3}$

Our final answer would be,
$x=-2$

Thanks!
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3 years ago

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2 years ago

Siri can run 6 miles in 3/4 of an hour at this rate what is the total number of miles a student can run in one hour

Lesechka [4]

Answer:

4.5 mph

Step-by-step explanation:

6 times 3 is 18.

18 divided by 4 is 4.5

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2 years ago

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IRISSAK [1]

Im not that good with these types of problems but i think it is b if my math is correct.

6 0

3 years ago

Solve using system of equations by using elimination method for -5x+4y=2 ; 9x-4y=6

jek_recluse [69]

Answer:

y = 3

x = 2

Step-by-step explanation:

-5x + 4y = 2

9x - 4y = 6

Sum both eq.

-5x + 9x = 4x

+4y - 4y = 0

2 + 6 = 8

then:

4x + 0 = 8

4x = 8

x = 8/4

x = 2

from the first eq.

-5x + 4y = 2

-5*2 + 4y = 2

-10 + 4y = 2

4y = 2 + 10

4y = 12

y = 12/4

y = 3

Check:

from the second eq.

9x - 4y = 6

9*2 - 4*3 = 6

18 - 12 = 6

6 0

2 years ago