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3 years ago

If f(x) = 5x + 3x² - 7x

Mathematics

1 answer:

Novay_Z [31]3 years ago

4 0

Answer:

the answer is going to be A. -6x - 14 x+ 6

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Amanda has a rectangular poster that is 20 centimeters long and 16 centimeters wide. what is the area of the poster in square me

Crazy boy [7]

320 square meters, just multiply.

5 0

2 years ago

A local company makes a candy that is supposed to weigh 1.00 ounces. A random sample of 25 pieces of candy produces a mean of 0.

Firlakuza [10]

Answer: (0.994, 0.998)

Step-by-step explanation:

Given : Sample size : n= 25 < 30 , so we use t-test.

$\overline{x}=0.996\ \ ;\ s=0.004$

Critical t-value use for 98% confidence :

$t_{n-1,\alpha/2}=t_{24,0.01}=2.492$

Formula to find the confidence interval :-

$\overline{x}\pm t_{\alpha/2}(\dfrac{\sigma}{\sqrt{n}})$

i.e. $0.996\pm (2.492)(\dfrac{0.004}{\sqrt{25}})$

$=0.996\pm 0.0019936\approx0.996\pm0.002\\\\=(0.996-0.002,\ 0.996+0.002)\\\\=(0.994,\ 0.998)$

Hence, the required confidence interval : (0.994, 0.998)

6 0

2 years ago

Find the value of X for the triangle.

user100 [1]

Answer:

Step-by-step explanation:

77+50=127

180-127=53

7x-3=53

7x=53+3

7x=56

x=56/7

x=8

8 0

2 years ago

On their farm, Beth’s parents decided to plant beans in a certain area. They chose an area that was 1/2 of an acre wide and 3/4

Angelina_Jolie [31]

Answer: The answer is 3/8

Step-by-step explanation: For this problem you only need to multiply the fractions. So when you multiply the two fractions you first multiply both numerators so 1 X 3 = 3 then the denominators 4 X 2 = 8. So the fraction is 3 over 8 3/8.

Hope this helps.

7 0

2 years ago

Read 2 more answers

Solve 6 - x - x = 18

iragen [17]

$\text{Hey there!}$

$\mathsf{Solve: 6 -x- x=18}$

$\mathsf{Combine\ your\ like\ terms}\\\mathsf{6 -\bf{x - x}\mathsf{= 18}}\\\mathsf{-x-x=-2x}\\\mathsf{Your\ new\ equation: -2x+6=18}\\\\\mathsf{Do\ the\ OPPOSITE\ symbol\ on\ both\ sides\ of\ the\ equation}\\\mathsf{Addition\ opposite\ symbol\ is\ subtraction}\\\mathsf{Subtract\ by\ 6\ on\ your\ sides}\\\mathsf{-2x+6-6=18-6}\\\mathsf{Cancel\ out{6-6\ because\ it\ gives\ us\ 0}}\\\mathsf{Keep:18-6\ because\ it\ helps\ us\solve\ for\ the\ answer}\\\\\mathsf{Next,\ divide\ both\ sides\ by\ -2}$

$\mathsf{\dfrac{-2x}{-2}=\dfrac{12}{-2}}\\\\\mathsf{Cancel\ out: \dfrac{-2x}{-2}\ because\ it\ gives\ you\ the\ result\ of 1}\\\\\mathsf{Keep:\dfrac{12}{-2}\ because\ it\ gives\ the\ answer\ of\ x}\\\\\\\boxed{\bf{Answer:\mathsf{x=-6}}}}}}}\checkmark$

$\text{Good luck on your assignment and enjoy your day!}\\\\\frak{LoveYourselfFirst:)}$

5 0

2 years ago

Read 2 more answers