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Vedmedyk [2.9K]
3 years ago
13

Combing like terms -4(7 + 3a) -6a(4a - 5)

Mathematics
1 answer:
Ludmilka [50]3 years ago
5 0

Answer:

-24a² - 42a - 28

Simplified form =  12a² + 21a + 14

Step-by-step explanation:

-4(7 + 3a) - 6a(4a - 5) (distribute -4)

-28 - 12a -6a(4a - 5) (distribute -6a)

-28 - 12a -24a² - 30a (collect like terms)

-24a² - 42a - 28

We can simplify

-24a² - 42a - 28 (divide -2)

12a² + 21a + 14

Hope this helps ya! Keep smiling!

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What fraction of 9 is 3​
Alex Ar [27]

Answer:

1/3

Step-by-step explanation:

Take the part over the whole

3/9

We can simplify

Divide the top and bottom by 3

1/3

4 0
3 years ago
Read 2 more answers
A farmer has a bale of hay with mass of 36 kilograms. How many milligrams of hay are in the bale?
Ilia_Sergeevich [38]

KILO=1000.............. MILLI= thousandth

1kg is 1000 grams

1 milligram is one thousandth of a gram, so a 1 gram = 1000mg.

in 36 kg, then there are 36 * 1000 grams.

and in (36*1000) grams there are (36*1000)*1000 mg, 36,000,000 mg.

4 0
3 years ago
Sierra is going on a field trip that costs $48. The cost includes $20 for transportation and two tickets that each cost the same
True [87]
We know that there are two tickets (which we'll represent with x) and a fee for transporation (which is $20)

So we can set up the equation 20+2x=48

We want to isolate x so we'll subtract 20 from each side, which gives us the equation
2x=28

Then divide each side by 2
Giving us the final answer of

x=14

So each ticket costs $14
5 0
3 years ago
How is 3x-y=8 and x+2y=5 solved by combination (addition)?????
pentagon [3]
First, multiply the first equation by 2.

That turns the first equation into:

6x - 2y = 18

That way it can easily be added to the second equation:

6x - 2y = 16
x  + 2y = 5
---------------
7x = 21
==========

As you can see, the y disappeared, which was the objective of this operation.

Now the equations can be solved easily:

7x = 21
x = 3

Insert x=3 in the original equation:

3*3 - y = 8
9 - y = 8
9 = 8 + y
y = 1

So the result is:

x = 3
y = 1
5 0
3 years ago
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Jillian is using integer tiles to add 7 + (negative 2). She uses the steps below. Step 1 7 positive tiles. Step 2 7 positive til
raketka [301]

Answer:

<h3>Step 4</h3>

Step-by-step explanation:

Given the expression 7+(-2)

Let 7 be 7 positive tiles since it is a positive number

Let -2 be 2 negative tiles being a negative number

7+(-2) = 7 positive tiles <em>and</em> 2 negative tiles

note that + * - will give minus sigh (-), the expression will become:

7+(-2) = 7-2

7-2 = 5

Hence the expression gives 5 positive tiles not 2 positive tiles according to Jillian calculations in step 4.

Hence Jillian made an error in step 4

7 0
3 years ago
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