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lidiya [134]
2 years ago
10

What expression is equivalent to 3a - 2a x 4a +6a

Mathematics
2 answers:
Orlov [11]2 years ago
8 0

Answer:

a (9 - 8 a x)

Step-by-step explanation:

Simplify the following:

3 a - 2 a x×4 a + 6 a

-2 a x×4 a = -2 a^2 x×4:

3 a + -2 a^2 x×4 + 6 a

-2×4 = -8:

3 a + -8 a^2 x + 6 a

Grouping like terms, 3 a - 8 a^2 x + 6 a = -8 a^2 x + (3 a + 6 a):

-8 a^2 x + (3 a + 6 a)

3 a + 6 a = 9 a:

-8 a^2 x + 9 a

Factor a out of -8 a^2 x + 9 a:

Answer: a (9 - 8 a x)

Papessa [141]2 years ago
5 0

Answer:

a · 10a = 10a

Step-by-step explanation:

It's straight forward, you would solve both sides from the multiplication symbol, and in this instance there is no need to change symbols.

Hopefully that helps.

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On a certain day, the temperature changed at a rate of 3°F per hour. How long did it take for the change in temperature to be -3
mamaluj [8]

Answer:

I think 11 hours.

Step-by-step explanation:

If I know starting temp such as 0 degrees then I can say that it would take 11 hours as 11*3 = 33. If it is 3 degrees, then it would 3*12 = 36 degrees.

7 0
2 years ago
What is the product (6r-1)(-8r-3)
eimsori [14]
Use the FOIL method (First, Outside, Inside, Last)

6r(-8r) = -48r²
6r(-3) = -18r
-1(-8r) = 8r          (note: two negatives multiplied together = positive answer)
-1(-3) = 3

-48r² - 18r + 8r + 3

Combine like terms:


-48r² - 18r + 8r + 3

-48r² - 10r + 3


-48r² - 10r + 3 is your answer

hope this helps
6 0
2 years ago
Draw the number 24 then draw a quick picture to show 24 after you have to regrouped 1 ten as 10 ones explain how both pictures s
Vesnalui [34]
First draw 24 shapes of your choice.

Then, in a different space or below those 24 shapes, draw 10 more shapes twice. So draw 10 shapes and draw 10 more next to them. Finally, draw 4 more shapes with space between them and say "10+10+4=24"
6 0
2 years ago
"A consultant compiled the following data set that shows" the number of visits made to the National Museum of American History f
aalyn [17]

Answer:

Step-by-step explanation:

The best option is for the consultant to remove these data points because they are outliers.  Unusual data points which are located far from rest of the data points are known as outliers.

3 0
2 years ago
A psychologist is collecting data on the time it takes to learn a certain task. For 50 randomly selected adult subjects, the sam
tatuchka [14]

Answer: (15.263,\ 17.537)

Step-by-step explanation:

According to the given information, we have

Sample size : n= 50

\overline{x}=16.40

s=4.00

Since population standard deviation is unknown, so we use t-test.

Critical value for  95 percent confidence interval  :

t_{n-1,\alpha/2}=t_{49, 0.025}= 2.009575\approx2.010

Confidence interval : \overline{x}\pm t_{n-1, \alpha/2}\dfrac{s}{\sqrt{n}}

16.40\pm (2.010)\dfrac{4}{\sqrt{50}}\\\\=16.40\pm1.13702770415\\\\=16.40\pm1.1370\\\\=(16.40-1.1370,\ 16.40+1.1370)\\\\=(15.263,\ 17.537)

Required 95% confidence interval :  (15.263,\ 17.537)

8 0
2 years ago
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