The firefighters responded to 427 calls in March and 572 calls in April. Which of the following is the best way to estimate the total
calls in March and April, rounded to the nearest hundred?

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.

Write the rational number in lowest terms 99/-15

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"