MATHEMATICS MIDDLE SCHOOL

Simplify. −4x^2−5(x+3)+x^2

Answers

Answer 1

Answer:

Answer:

-4x² - 5(x + 3) + x²

= -4x² - 5x - 15 + x²

= -3x² - 5x - 15

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How many 2 over 3 foot pieces can Wendy cut from the 5 and 1 over 3 feet of ribbon? Show your workUsing the information in Part A, interpret the meaning of the quotient in terms of the two fractions given.

Answers

The number of the pieces will be equal to 8.

What is an expression?

The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.

Given that the ribbon size is 5(¹/₃) and the piece to be cut is 2/ 3 feet in size.

The number of pieces will be calculated by dividing the total size by the per piece size.

N = [ 5(¹/₃) / ( 2/ 3) ]

N = [ (16/3) / (2 / 3)]

N = 16 / 2

N = 8

Therefore, the number of pieces will be equal to 8.

To know more about an expression follow

brainly.com/question/21610929

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2/3 foot pieces from 5(1/3) pieces.. hmm. Well, step one is to convert that mixed number into an improper fraction. To do that, Multiply the denominator by the whole number, then add the numerator, and put that answer in a fraction over the original denominator. In this case, it would be 3*5=15+1=16/3.
Now that the denominators are the same, all we need to do is see how many times 2 goes into 16. 16/2 is 8. Your answer is 8.

How do I do these questions?

Answers

I just did the first one but I don't know is it correct

In scientific notation, what is the sum of 2.3 times 10^{-3} and 5.4 times 10^{-4}?a. 2.84 times 10^{-3}b. 5.63 times 10^{-3}c. 7.7 times 10^{-7}d. 12.42 times 10^{-12}

Answers

2.3 x 10⁻³
5.4 x 10⁻⁴

It is better to add this using standard form because these two have different decimal places.

2.3 x 10⁻³ ⇒ 0.00230
5.4 x 10⁻⁴ ⇒ 0.00054
0.00284

0.00284 in scientific notation is 2.84 x 10⁻³

2
9 20,36, and 48 203948
GCF