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andrezito [222]
3 years ago
7

Find the product mentally. (2j + 7)(2j - 7)

Mathematics
1 answer:
Gwar [14]3 years ago
7 0


4j^2 -14j +14j - 49

4j^2 - 49

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Given f(x)=-2x^3 + 3x^2 , find the equation of that tangent line of f at the point where x=2.
trapecia [35]

Step 1: Find f'(x):

f'(x) = -6x^2 + 6x

Step 2: Evaluate f'(2) to find the slope of the tangent line at x=2:

f'(2) = -6(2)^2 + 6(2) = -24 + 12 = -12

Step 3: Find f(2), so you have a point on y=f(x):

f(2) = -2·(2)^3 + 3·(2)^2 = -16 + 12 = -4

So, you have the point (2,-4) and the slope of -12.

Step 4: Find the equation of your tangent line:

Using point-slope form you'd have: y + 4 = -12 (x - 2)

That is the equation of the tangent line.

If your teacher is picky and wants slope-intercept, solve that for y to get:

y = -12 x + 20

5 0
3 years ago
Lexi made 14 sandwiches for a group picnic. The number of ham sandwiches she made was 4 less than the twice the number of turkey
shutvik [7]

x = # of ham sandwiches

14-x = # of turkey sandwiches ( as Lexi made 14 sandwiches)


as the question said that the number of ha sandwiches are 4 less than twice number of turkey sandwiches,

x = 2 * (14-x) - 4 = 24 - 2x

3x=24

x = 8


the number of ham sandwiches is 8, and the number of turkey sandwiches is 14-8=6

6 0
3 years ago
I need help pleassse
grin007 [14]

Answer:

210 ml

Step-by-step explanation:

3 0
3 years ago
The volume of a cuboid is 2160cm3. The length is 12cm and the width is 150mm. Work out the height of the cuboid in cm.
White raven [17]

Answer:

12 cm

Step-by-step explanation:

12x15 (150)

2160/180

= 12 cm

8 0
3 years ago
Where would 3/5 be plotted in a number line?
Mamont248 [21]
Between 0 and 1, add dashes so you have a total of 6 marks including 0 and 1. Then count 3 over and that would be 3/5.

7 0
3 years ago
Read 2 more answers
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