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mina [271]
3 years ago
6

If a=-3 what would 3a^2 equal

Mathematics
1 answer:
eduard3 years ago
6 0

Answer:

27

Step-by-step explanation:

All you have to do is plug a into the equation.

3a^2

3(3)^2

3 squared equals 9.

3(9)

Now multiply 3 times 9.

=27

I hope this helps! :)

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Choose the best answer for the question below
ycow [4]

Answer:

The answer would be D.

Step-by-step explanation:

Hope this Helps! Have a good day!

4 0
2 years ago
Read 2 more answers
In a 45-45-90 rìght triangle, what is the ratio of the length of one leg to the
Slav-nsk [51]

Answer:

The legs of a 45 45 90 are equal

And the length of the hypotenuse equals

leg * square toot of 2

Step-by-step explanation:

5 0
3 years ago
How to simplify -2 1/4 - 2/3 (-2+1/5)
lesya [120]

Answer:

(-21)/20

Step-by-step explanation:

Simplify the following:

-(2 + 1/4) - 2/3 (1/5 - 2)

Put 2 + 1/4 over the common denominator 4. 2 + 1/4 = (4×2)/4 + 1/4:

-(4×2)/4 + 1/4 - 2/3 (1/5 - 2)

4×2 = 8:

-(8/4 + 1/4) - 2/3 (1/5 - 2)

8/4 + 1/4 = (8 + 1)/4:

-(8 + 1)/4 - 2/3 (1/5 - 2)

8 + 1 = 9:

-9/4 - 2/3 (1/5 - 2)

Put -2 + 1/5 over the common denominator 5. -2 + 1/5 = (5 (-2))/5 + 1/5:

-9/4 - 2/3 1/5 + (5 (-2))/5

5 (-2) = -10:

-9/4 - 2/3 ((-10)/5 + 1/5)

-10/5 + 1/5 = (-10 + 1)/5:

-9/4 - 2/3 (1 - 10)/5

-10 + 1 = -9:

-9/4 - 2/3×(-9)/5

-2 (-9) = 18:

(-9)/4 + 18/(3×5)

3×5 = 15:

(-9)/4 + 18/15

The gcd of 18 and 15 is 3, so 18/15 = (3×6)/(3×5) = 3/3×6/5 = 6/5:

(-9)/4 + 6/5

Put (-9)/4 + 6/5 over the common denominator 20. (-9)/4 + 6/5 = (5 (-9))/20 + (4×6)/20:

(5 (-9))/20 + (4×6)/20

5 (-9) = -45:

(-45)/20 + (4×6)/20

4×6 = 24:

(-45)/20 + 24/20

-45/20 + 24/20 = (-45 + 24)/20:

(-45 + 24)/20

-45 + 24 = -21:

Answer: (-21)/20

5 0
3 years ago
Phyllis invested $10,500 a portion earning a simple interest rate of 9(1/5)% per year and the rest earning a rate of 9% per year
Alenkinab [10]
Total investment  = $10,500

Let x = amount of first investment, and y the amount of the second investment.

First investment:
Interest rate = 9 (1/5)% = 0.092
Earned interest = 0.092x

Second investment:
Interest rate = 9% = 0.09
Earned interest = 0.09y

Total interest after one year is $957.00, therefore
0.092x + 0.09y = 957       
 or
1.0222x + y = 10633.33   (1)

Also,
x + y = 10500               (2)

Subtract (2) from (1).
0.0222x = 133.33
x = 6000
y = 10500 - x = 4500

Answer:
The first investment is $6,000 at 9 (1/5)% rate;
The second investment is $4,500 at 9% rate.

7 0
3 years ago
12 pay of christmas​
podryga [215]

Answer:

aint happy yet

Step-by-step explanation:

7 0
3 years ago
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