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3 years ago

I NEED HELP!!!! WILL MARK BRAINLIEST!!!

Mathematics

1 answer:

SashulF [63]3 years ago

6 0

Answer: J

Step-by-step explanation:

x=8, so substitute and Length=12 Width=9

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SOMEONE HELP PLEASE !!! n^2 - m; use m = 7, and n = 8

gladu [14]

Answer:

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Step-by-step explanation:

Step 1: Define

n² - m

m = 7

n = 8

Step 2: Evaluate

Substitute: 8² - 7
Exponents: 64 - 7
Subtract: 57

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3 years ago

What is the value of (x^3 − 7x^2 − 18x + 42) when x = 3?

Eva8 [605]

Answer:

-150

Step-by-step explanation:

x^2 - 7x^2 - 18x +42

3^2 - 7(3)^2 - 18(3) + 42

9 - 63 - 54 + 42

-54 -54 + 42

-108 + 42

-150

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3 years ago

Differentiate 3x^2-5x

weqwewe [10]

Answer:

6x - 5

Step-by-step explanation:

$Let \: y = 3 {x}^{2} - 5x \\ \\ \frac{dy}{dx} = \frac{d}{dx} (3 {x}^{2} - 5x) \\ \\ = 3 \frac{d}{dx} {x}^{2} - 5 \frac{d}{dx} x \\ \\ = 3(2x) - 5(1) \\ \\ \boxed{\boxed{\huge \purple{\frac{dy}{dx}} \pink{ = } \orange{6x - 5}}}$

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3 years ago

Question 4(Multiple Choice Worth 1 points) (06.07 LC) Which expression is equal to 3x? Ox+ 3 Ox+ x + x O x + x2 0 2x + 1 ting

Firdavs [7]

Answer:

the answer is :.......

x+x+x

6 0

3 years ago

Solve for x:

777dan777 [17]

Answer:

Step-by-step explanation:

x^2+120=0 can be rewritten as x^2 = - 120. Taking the square root of both sides, we get x = plus or minus i*√120 = plus or minus i*√4√30, or

x = plus or minus i*2√30

So the correct answer choice here is "None of the above."

6 0

3 years ago