Ineed with my assignment, does anyone know the answer to this?

The base length of the triangle is 15 units

Step-by-step explanation:

The area of a triangle is given by the formula; 1/2 *base* perpendicular height. In the presented scenario, we can determine the base by solving for base in the given equation; 1/2 *base*7 =52.5. Multiply both sides by 2 yields; base*7 =105. Dividing by 7 yields; base=15 units

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m