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algol [13]
3 years ago
6

Help please I have a final literally tomorrow

Mathematics
1 answer:
VikaD [51]3 years ago
7 0
<h3>Answer: Choice D</h3><h3>sin^2(x) + 1</h3>

========================================================

Work Shown:

2sin^2(x) + cos^2(x)

2sin^2(x) + 1 - sin^2(x) .. see note below

[ 2sin^2(x) - sin^2(x) ] + 1

sin^2(x) + 1

note for step 2 above, I used the Pythagorean trig identity (or a slight variation of it) to replace cos^2(x) with 1-sin^2(x).

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Robert has available 400 yards of fencing and wishes to enclose a rectangular area. Express the areaAof the rectangle as a funct
solong [7]

Answer:

The answer is below

Step-by-step explanation:

a)Given that the length of fencing available is 400 yards. This means that the perimeter of the rectangle is 400 yards.

the perimeter of a rectangle is given as:

Perimeter = 2(length + width) = 2(l + w)

Hence;

400 = 2(l + w)

200 = l + w

l = 200 - w

The area of a rectangle is given as:

Area = length × width

Area = (200 - w) × w

Area = 200w - w²

b) For a quadratic equation y = ax² + bx + c. it has a maximum at x = -b/2a

Hence, for the area = 200w - w² a=-1, b = 200, the maximum width is at:

w = -b/2a = -200/2(-1) = -200/-2 = 100

A width of 100 yard has the largest area

c) l = 200 - w = 200 - 100 = 100 yards

Area = l × w = 100 × 100 = 10000 yd²

The maximum area is 10000 yd²

7 0
2 years ago
Mary weighs n kg while her sister weighs 15 kg less. How many times is Mary heavier than her sister?
kari74 [83]

Answer:

Mary is  \frac{n}{n-15}  times heavier than her sister

Step-by-step explanation:

Mary's Weight = n

Sister's Weight = n - 15

To find how many times mary is heavier, we need to multiply "that many time" [let it be x] with sister's weight to get Mary's weight.

<u>e.g. </u>If someone weighs 100 and another person 50, 50 * 2 = 100, thus, 100 kg person is 2 times heaving. We do same for this:

(n - 15) * x = n

x = n/(n - 15)

3 0
2 years ago
Read 2 more answers
Solve for X using special rights
Scorpion4ik [409]
  • <em>Answer:</em>

<em>b) 30</em>

  • <em>Step-by-step explanation:</em>

<em>Hi there !</em>

<em> the side opposite the angle of 30 is </em><em>half</em><em> the hypotenuse</em>

<em>x = 2×15</em>

<em>x = 30</em>

<em>Good luck !</em>

4 0
2 years ago
-12x = -48<br><br> A) 576<br> B) 4<br> C) -4<br> D) 1/4
Ratling [72]
-12x = -48

-12x/-12 = -48/-12

x = 4

hope this helps
3 0
2 years ago
Read 2 more answers
Compare the two graphs and explain the transformation that was applied to f(x) in order to look exactly like the graph of g(x).
tia_tia [17]

Answer:

g(XS)

Step-by-step explanation:

bring it up 2 squares ftom 4

5 0
3 years ago
Read 2 more answers
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