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joja [24]
3 years ago
9

How do you solve this step by step?

Mathematics
2 answers:
kolezko [41]3 years ago
5 0

Answer:

90

Step-by-step explanation:

Evaluate x^2 + 2 x^2 + 3 x^2 + 4 x^2 where x = 3:

x^2 + 2 x^2 + 3 x^2 + 4 x^2 = 3^2 + 2×3^2 + 3×3^2 + 4×3^2

3^2 = 9:

3^2 + 2×9 + 3×3^2 + 4×3^2

3^2 = 9:

3^2 + 2×9 + 3×9 + 4×3^2

3^2 = 9:

3^2 + 2×9 + 3×9 + 4×9

3^2 = 9:

9 + 2×9 + 3×9 + 4×9

2×9 = 18:

9 + 18 + 3×9 + 4×9

3×9 = 27:

9 + 18 + 27 + 4×9

4×9 = 36:

9 + 18 + 27 + 36

| 3 |  

| 3 | 6

| 2 | 7

| 1 | 8

+ | | 9

| 9 | 0:

Answer:  90

san4es73 [151]3 years ago
5 0

Answer:

270

Step-by-step explanation:

first you would put a 3 in all of the X

3^2+2(3)^2+3(3)^2+4(3)^2

9+36+81+144

270

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Answer: 3


Step-by-step explanation:

Given: x^2/12

Now, substitute. 6^2/12

36/12

3

4 0
3 years ago
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at a softball game you can get a bratwurst for $4.50. you have $18 to spend. write and solve an inequality to determine the numb
babunello [35]
You can only buy 4 bratwursts.

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What is the interval used in the graph shown below?<br><br> A. 4<br> B. 9<br> C. 10<br> D. 11
grin007 [14]

Answer:

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Step-by-step explanation:

7 0
2 years ago
Need help pls..........................................
Sonja [21]

Answer:

6, -2

Step-by-step explanation:

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3 0
2 years ago
Everyday Math
aliya0001 [1]

Answer:

In 1942 , the U.S. Mint produced 154,500,000 nickels. The scientific notation of 154,500,000 is obtained as $1.545 \times 10^{8}$.

Step-by-step explanation:

  • In the problem, it is given that in 1942, the U.S. Mint produced 154,500,000 nickels.
  • It is required to write 154,500,000 in scientific notation.
  • To solve this first, move the decimal point so that the first factor is greater than or equal to 1 also it should be less than 10.
  • Count the number of decimal places n, and write the number as a product with a power of 10. Then check the answer.

Step 1 of 2

Obtain the scientific notation.

Here the original number, 154,500,000 is greater than 1 so we will have a positive power of 10 .

Move the decimal point to get 1.545, a number between 1 and 10 . Then we get,

1.54500000

The count of the number of decimal places the point was moved is 8 .

Write as a product with a positive power of 10 .

$1.545 \times 10^{8}$

Step 2 of 2

Check the answer.

Rewrite and simplify to check our answer.

$$\begin{gathered}1.545 \times 10^{8}=1.545 \times 100000000 \\=154500000\end{gathered}$$

7 0
1 year ago
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