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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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Anna is given the equation 3 + 2x = 2x + 3 The replacement set is {2, 3, 4, 5} Anna says the solution is {3}, but the teacher ma
alexira [117]

<u><em>Answer:</em></u>

The given equation has <u>infinite number of solutions</u>. This means that <u>any real number</u> can be considered a solution to the given equation.

Since the given replacement set {2,3,4,5} consists of real numbers, therefore, the whole set is considered as a solution to the given equation.

This is because, when solving the given equation for x, we will end up with 0 = 0, this means that whatever the value of x is, both sides of the equation will always be equal.

<u><em>Explanation:</em></u>

To solve for x, we need to isolate the x on one side of the equation.

<u>This can be done as follows:</u>

3 + 2x = 2x + 3 (subtract 3 from both sides)

2x = 2x (subtract 2x from both sides)

0 = 0

This means that whatever, the value of x is, both sides of the equation will be equal. This means that all real numbers are considered a solution for this equation.

<u>Let's verify this using the given replacement set {2,3,4,5}:</u>

<u>For x = 2: </u>

Left hand side: 3 + 2(2) = 3 + 4 = 7

Right hand side: 2(2) + 3 = 4 + 3 = 7

Both sides are equal.

<u>For x = 3:</u>

Left hand side: 3 + 2(3) = 3 + 6 = 9

Right hand side: 2(3) + 3 = 6 + 3 = 9

Both sides are equal.

<u>For x = 4:</u>

Left hand side: 3 + 2(4) = 3 + 8 = 11

Right hand side: 2(4) + 3 = 8 + 3 = 11

Both sides are equal.

<u>For x = 5:</u>

Left hand side: 3 + 2(5) = 3 + 10 = 13

Right hand side: 2(5) + 3 = 10 + 3 = 13

Both sides are equal.

Hope this helps :)


5 0
4 years ago
Find the vertex of the parabola that represents a function f(x)=(x-5)^2+9
poizon [28]
(5,9) because vertex form is (x-h)^2+k and the vertex is (h,k) so it would be (5,9)
5 0
3 years ago
1. -2x + 24 = 93. 2. 1.5x - 1.1 = 3.4​
Gnesinka [82]

Answer:

1.

- 2x + 24 = 93 \\ 2x - 24 =  - 93 \\ 2x =  - 69 \\ x =  - 34.5

2.

1.5x - 1.1 = 3.4 \\ 1.5x = 4.5 \\ x = 3

8 0
3 years ago
Read 2 more answers
Keith paid $14.73 on a gerbil toy, and a cage cost him $11.71 with two $20 bills. Keith
Rashid [163]

40+1-(14.73+11.71)

41-26.44

14.56 left in change

7 0
3 years ago
Read 2 more answers
In a town of 117 000 people, 14000 like to
Naddik [55]

Divide number that like hockey by population then multiply by 100:


14,000 / 117,000 = 0.11965

0.11965 x 100 = 11.965%

Round up to 12%

8 0
3 years ago
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