the number of men and women receiving bachelor’s degrees each year has been steadily increasing. for years 1970 through the projections of 2014, the number of men receiving degrees (in thousands) is given by the equation y=3.9x+443, and for women, the equation is y=14.3x+316, where x is the number of years after 1970.

substitution method and ordered pair

1 answer

To find the year when the number of men and women receiving bachelor's degrees are equal, we can use the equations given:

For men:
\[ y = 3.9x + 443 \]

For women:
\[ y = 14.3x + 316 \]

To find the point where the number of men and women receiving degrees are the same, we can set the two equations equal to each other:

\[ 3.9x + 443 = 14.3x + 316 \]

Now, let's solve for \( x \):

  1. Subtract \( 3.9x \) from both sides: \[ 443 = 14.3x - 3.9x + 316 \] \[ 443 = 10.4x + 316 \]

  2. Subtract \( 316 \) from both sides: \[ 443 - 316 = 10.4x \] \[ 127 = 10.4x \]

  3. Divide both sides by \( 10.4 \): \[ x = \frac{127}{10.4} \] \[ x \approx 12.19 \]

Since \( x \) represents the number of years after 1970, we can find the year: \[ 1970 + 12.19 \approx 1982.19 \]

This suggests that in the year approximately around 1982, the number of bachelor's degrees awarded to men and women were equal.

Next, we can substitute \( x \) back into either equation to find \( y \):

Let's use the men's equation: \[ y = 3.9(12.19) + 443 \] \[ y \approx 47.6 + 443 \] \[ y \approx 490.6 \]

Thus, the ordered pair where the number of degrees awarded to men and women is equal is approximately: \[ (1982, 490.6) \]

To recap, the degree awards become equal around the year 1982 with approximately 490,600 degrees awarded.