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qwelly [4]
3 years ago
5

I need to solve this algebra expression

Mathematics
2 answers:
quester [9]3 years ago
7 0
Ok so they subtract instead of add because if you said I could have $5 to spend at the mall for an example and I took 7  I would have to pay you back. But what happens if you take 5 away from seven is you would get -2 so you would subtract that 2x10. You subtract it because it's a negative number. Does that make sense?
Art [367]3 years ago
6 0
5-7+2*10
5-7+20
-2+20=18
The answer is :18
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To convert a percent to a decimal, you move the the decimal left two places to convert the percent to a decimal. For example, if you were to convert 14% to a decimal, you move the decimal left two places so that 14% converted to a decimal would look something like this: 0.14
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3 years ago
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How do you solve this step by step?
kolezko [41]

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

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3 years ago
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A student rolls a number cube Whose six faces are numbered 1 through 6 what is the sample space for this experiment.
KiRa [710]

Answer:

It depends on how you define an outcome.

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Step-by-step explanation:

"This experiment" covers a lot of territory. The student could be checking to see if the die stays on the table or falls to the floor. The student could be experimenting to see if the die changes color or makes a certain kind of noise. The experiment could involve the number of times the die rolls over to a new face before it comes to rest. Until the experiment is properly defined, the sample space is unknown.

If the experiment is to see what number shows on the top face of the die at rest on a horizontal surface, then the sample space is presumably the set of numbers 1 through 6.

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svetlana [45]
13 students went to the concert
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