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3 years ago

Systems of equations have one solution.. . Always. . Sometimes. . Never

1 answer:

4 0

Systems of equations have one solution SOMETIMES.

There are equations wherein the lines intersect.
There are equations wherein the lines do not intersect so no solutions.
Thus, the answer is sometimes.

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The steepness or grade of a road is expressed as a percent. if a road rises 6feet for every 24 horizontal feet. What is the slop

anygoal [31]

Answer:

25%

Step-by-step explanation:

The ratio of rise to run is ...

rise/run = 6 ft/24 ft = 1/4

Expressed as a percentage, this is ...

1/4 × 100% = 25%

_____

<em>Comment on this grade</em>

Interstate highways are limited to a 7% grade. Most local jurisdictions limit the grade of a road to somewhere between 12% and 15%.

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4 years ago

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Match the terms below to their definition. Circumcenter

Natasha_Volkova [10]

Answer:

passes through all verrtices of a polygon

Step-by-step explanation:

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3 years ago

Are these ratios equivalent? 12 bouquets for every 20 corsages 9 bouquets for every 15 corsages?

ohaa [14]

Answer:

yes, they are

Step-by-step explanation:

3;5 = 6;10

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3 years ago

Select the postulate that specifies the minimum number of points in space.

rusak2 [61]

I think step five is correct but no sure

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3 years ago

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Question 4 of 25

Gnoma [55]

Answer:

Step-by-step explanation:

We are looking for P(58 < x < 64). We need to find the percentage to the left of the z-scores for each of these numbers. To find the z scores, use the formula:

$z=\frac{x_i-\bar{x}}{\sigma}$

$z=\frac{58-62}{4}$ which gives us a z-score of -1. The percentage of numbers to the left of a z-score of -1 is .1586553

Now for the other z-score:

$z=\frac{64-64}{4}$ which gives us a z-score of .5. The percentage of numbers to the left of a z-score of .5 is .69146246

The lower percentage subtracted from the higher gives the area in question:

.69146246 - .1586553 = .53280716, or as a percentage, 53.3%, choice A.

7 0

3 years ago