Jack typed 80 words per minute when he enrolled in a typing course. his typing speed increased by 3% two weeks into the course. at the end of the course, jack was able to type his entire 1, 680 word document in 20 minutes. what was the percent of increase in his typing speed from the beginning of the course to the end? a 3% b 4% c 5% d 6% e 7%

The answer is option C : 5%.

Step-by-step explanation:

Jack typed 80 words per minute when he enrolled in a typing course.

His typing speed increased by 3% two weeks into the course.

At the end of the course, Jack was able to type his entire 1, 680 word document In 20 minutes.

Hence, the percent of increase in his typing speed from the beginning of the course to the end is given by:

=5%

Therefore, the answer is option C : 5%.

so firstly, we need to isolate the y variables to be able to solve these inequalities. firstly, add 0.5x on both sides of the first inequality and subtract 1.5x on both sides of the second inequality:

now since the slope is positive for the first inequality, this means that the line going upwards belongs to the first inequality, and the line going downwards belongs to the second inequality.

next, since y ≥ in the first inequality, this means that the shaded region will be above the first inequality's line, thus shading regions a and b.

next, since y ≤ in the second inequality, this means that the shaded region is going to be below this line, thus shading regions a and c.

since both lines shade region a, this means that region a is the solution.

step-by-step explanation:

mark brainliest!

7.25

step-by-step explanation:

we know that 7 equals to 7.0. we also know that 1/4=0.25. so we can add the two together and we get 7.25