Answer:
648
Step-by-step explanation:
You can use a calculator or break it into smaller problems, then add them together
Answer: 7
Step-by-step explanation: it just makes sense
Answer:
a
Step-by-step explanation:
Answer:
-9
Step-by-step explanation:
2(-x)² - 5 = 157
2x² - 5 = 157
add 5 to each side of the equation:
2x² = 162
divide both sides by 2:
x² = 81
√81 = 9 or -9
(z+1.2)/5=3.6
quotient: division
