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3 years ago

Help I have 5minutes left

Mathematics

2 answers:

Lubov Fominskaja [6]3 years ago

8 0

Answer: C

Step-by-step explanation:

victus00 [196]3 years ago

6 0

THE ANSWER IS C

Your welcome :)

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1.8.3 practice - functions<br><br>11. Find f(2) and f(a+h) when f(x) = 3x^2 + 2x + 4.

drek231 [11]

The answer is f(2) = 20

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2 years ago

Giving brainliest to CORRECT answer.

gavmur [86]

Answer:

Graph A

Step-by-step explanation:

$y = {x}^{2} - 6x - 7 \\ plug \: y = 0 \\ {x}^{2} - 6x - 7 = 0 \\ {x}^{2} - 6x + 9 = 7 + 9 \\ (x - 3)^{2} = 16 \\ (x - 3) = \pm 4 \\ x = 4 + 3 \: or \: x = - 4 + 3 \\ x = 7 \: or \: x = - 1$

Its mean graph should intersect x axis at x = 7 and x = - 1. This everything is satisfied by graph A.

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2 years ago

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The width and length of a rectangle are (x+2) and (2x+5). Find the expression that can be used to represent the perimeter and ar

Aliun [14]

To find the area of this rectangle you multiply the length by the width, like so (x+2) x (2x+5) .

To find the perimeter of this rectangle you add all the sides using this equation,
(x+2)+(x+2)+(2x+5)+(2x+5) .

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2 years ago

If f(x)=x^2- 4 and g(x)=x^2 plus 2 x,

gregori [183]

Answer:

$\huge\boxed{(f-g)\left(-\dfrac{1}{3}\right)=-3\dfrac{1}{3}}$

Step-by-step explanation:

$\text{We have}:\\\\f(x)=x^2-4\ \text{and}\ g(x)=x^2+2x\\\\(f-g)(x)=f(x)-g(x)\\\\\text{therefore}\\\\(f-g)(x)=(x^2-4)-(x^2+2x)=x^2-4-x^2-2x\\\\=(x^2-x^2)-2x-4=-2x-4\\\\(f-g)\left(-\dfrac{1}{3}\right)\to\text{put}\ x=-\dfrac{1}{3}\ \text{to the equation of the function}\ (f-g)(x):\\\\(f-g)\left(-\dfrac{1}{3}\right)=-2\left(-\dfrac{1}{3}\right)-4=\dfrac{2}{3}-4=-3\dfrac{1}{3}$

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3 years ago

John does 5 pushups on the first day of a 30-day month, and then increases the number of pushups by 2 pushups a day. how many pu

xxMikexx [17]

He has done 70 push ups because by the 15th he has done 35 push ups add 15 more days and u get 70 .

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2 years ago

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