body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

Big Ideas Math: Modeling Real Life, Grade 8

BI

Big Ideas Math: Modeling Real Life, Grade 8 View details

Cumulative Practice

Exercise 1 Page 459

Remember the order of operations.

C

To evaluate the given numeric expression, we need to remember the order of operations. The acronym PEMDAS can help with that!

pemdas

Let's now consider our expression. 14 -2 sqrt(64) We first need to calculate the cube root. Because 4^3=64, we know that sqrt(64)=4. 14-2sqrt(64) calculate root ⟶ 14-2(4) Now we can finish evaluating our expression. According to the order of operations, we will multiply 2 and 4 first. Then, we will subtract the product from 14.

14-2(4)

Multiply

14-8

Subtract terms

6

The value of the expression is 6. This means that the correct answer is C.

Subchapter links

Exercises