Answer:
20% by mass means 20 g of the NaOH is dissolved in 100 g of solution. If that is what you mean.
Step-by-step explanation: What is the meaning of 20% mass by volume solution?
20% mass by volume means 20 g of the NaOH is dissolved in 100 mL of the solution.
Depends on the concentration terms meaning and values also changes.
The possible dimensions are -7 and -8 units.
Solution:
Area of the rectangular skateboard park =
To find the dimensions of the park.
Let us factor the polynomial:
15x can be written as 7x + 8x.
Take x common in 1st two terms and 8 common in next two terms.
Make sure that the remaining terms in the bracket should be equal.
Now, take the common term (x + 7) outside from both terms.
If the length of the park is -7 then the width is -8.
If the length of the park is -8 then the width is -7.
The possible dimensions are -7 and -8 units.
Answer:
Step-by-step explanation:
If in doubt, multiply them out.
(-i)^4 = i^4 = 1 . . . . . results for ±i
(-1)^4 = 1^4 = 1 . . . . . results for ±1
An even power of a negative number is equivalent to the same power of the opposite (positive) number. The even number of minus signs cancel in the final product.
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In trig form, unity is 1∠(n·360°) . . . . . for n = any integer
Then the 4th root is ...
1^(1/4) ∠(n·360°/4) = 1 ∠(n·90°) . . . . for n = 0...3 (angles repeat after that)
That is, the roots are ...
- 1∠0° = 1
- 1∠90° = i
- 1∠180° = -1
- 1∠270° = -i
Of these, all but the first are listed among your answer choices. The appropriate selection is <em>all of the above</em>. (recognizing that not all of the appropriate choices are "above" that answer selection).
The answer would be 80 because you are multiplying each number by 2. You multiply 5 x 2 = 10, 10 x 2 = 20, 20 x 2 = 40, and then 40 x 2 = 80. That is how I got the answer 80!!
Answer:
y = 3/4x +2
Step-by-step explanation:
The line crosses the y-axis at 2, so that is the y-intercept. The line appears to have a rise of 3 for a run of 4, so rise/run = slope = 3/4.
The slope-intercept form of the equation of a line is ...
y = (slope)x + (y-intercept)
y = 3/4x + 2