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3 years ago

Simplify (5x^2 + 3x + 4) + (2x^2 − 6x + 3).

Mathematics

2 answers:

raketka [301]3 years ago

7 0

Answer:

$\Large \boxed{7x^2-3x+ 7}$

Step-by-step explanation:

$(5x^2 + 3x + 4) + (2x^2 -6x + 3)$

Removing brackets.

$5x^2 + 3x + 4 + 2x^2 -6x + 3$

Grouping like terms.

$(5x^2 + 2x^2) + (3x -6x)+ (4 + 3)$

Combining like terms.

$(7x^2) + (-3x)+ (7)$

s2008m [1.1K]3 years ago

4 0

Answer:

7x² - 3x + 7

Step-by-step explanation:

Step 1: Write out expression

5x² + 3x + 4 + 2x² - 6x + 3

Step 2: Combine like terms (x²)

7x² + 3x + 4 - 6x + 3

Step 3: Combine like terms (x)

7x² - 3x + 4 + 3

Step 4: Combine like terms (constants)

7x² - 3x + 7

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Which of the following numbers is not a perfect square? 24 25 64 100

stich3 [128]

Hi!

A perfect square is the product of when a whole number is multiplied by itself

Ex:

6 × 6 = 36, 36 is the perfect square.

The number that is being multiplied is the square root.

So to find the correct answer for this question, let's use the process of elimination.

100 = 10 × 10 so we can cross out 100

64 = 8 × 8 so we can cross out 64

25 = 5 × 5 so we can cross out 25

Now all we have left is 24, which is not a perfect square.

Answer: A. 24

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Find the mean. 20, 5, 45, 90, 60, 45, 30, 10, 20, 45, 15,25

aliina [53]

$\huge\textsf{Hey there!}$

$\bullet \large\textsf{ Finding the mean you have to add up all of your numbers \& divide it}\\\large\textsf{by the total numbers in your data plot}$

$\mathsf{\dfrac{20 + 5 + 45 + 90 + 60 + 45 + 30 + 10 + 20+ 45 + 15 + 25}{12}}$

$\mathsf{20 + 5 + 45 + 90 + 60 + 45 + 30 + 10 + 20+ 45 + 15 + 25}$

$\mathsf{= 25 + 45 + 90 + 60 + 45 + 30 + 10 + 20 + 45 + 15 + 25}$

$\mathsf{= 70 + 90 + 60 + 45 + 30 + 10 + 20 + 45 + 15 + 25}$

$\mathsf{= 160 + 60 + 45 + 30 + 10 + 20 + 45 + 15 + 25}$

$\mathsf{= 220 + 45 + 30 + 10 + 20 + 45 + 15 + 25}$

$\mathsf{= 265 + 30 + 10 + 20 + 45 + 15 + 25}$

$\mathsf{= 295 + 10 + 20 + 45 + 15 + 25}$

$\mathsf{= 305 + 20 + 45 + 15 + 25}$

$\mathsf{= 325 + 45 + 15 + 25}$

$\mathsf{= 370 + 15 + 25}$

$\mathsf{= 385 + 25}$

$\mathsf{= \bf 410}$

$\mathsf{= \dfrac{410}{12}}$

$\mathsf{\dfrac{410}{12} \approx \bf 34.1667}$

$\boxed{\boxed{\huge\textsf{Thus, your ANSWER is: \boxed{\mathsf{ \bf \underline{{\star 34.1667\star}}}}}}}}\huge\checkmark$

$\huge\textsf{Good luck on your assignment \& enjoy your day!}$

~ $\frak{Amphitrite1040:)}$

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What is the meaning of this notation, f^-1(x)?

kogti [31]

Answer:

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Step-by-step explanation:

I hope this helps you!

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