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VLD [36.1K]
3 years ago
9

I need help please , i’ll give brainliest and 5 stars

Mathematics
1 answer:
DanielleElmas [232]3 years ago
3 0

Answer:

Arc DE = 70°

Arc RST = 206°

Step-by-step explanation:

arc DE + arc DC = 180° because EC is a diameter

7x + 7 + 11x + 11 = 180°

combine like terms:

18x + 18 = 180°

subtract 18 from both sides of the equation:

18x = 162°

divide both sides by 18:

x = 9

Arc DE = 7(9) + 7 = 70°

arc RST = 2(x + 103) = 2x + 206

arc RFT = 2(x + 77) = 2x + 154

arc RST + arc RFT = 360°

so:

2x + 206 + 2x + 154 = 360°

combine like terms:

4x + 360 = 360

4x = 0

x = 0

arc RST = 2x + 206 = 206°

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4 0
3 years ago
Helppppppppp pleaseeee Someoneeeee pleaseeee I neeed
Stella [2.4K]

Answer:

The minimum value of f(x) is 2

Step-by-step explanation:

  • To find the minimum value of the function f(x), you should find the value of x which has the minimum value of y, so we will use the differentiation to find it
  • Differentiate f(x) with respect to x and equate it by 0 to find x, then substitute the value of x in f(x) to find the minimum value of f(x)

∵ f(x) = 2x² - 4x + 4

→ Find f'(x)

∵ f'(x) = 2(2)x^{2-1} - 4(1)x^{1-1} + 0

∴ f'(x) = 4x - 4

→ Equate f'(x) by 0

∵ f'(x) = 0

∴ 4x - 4 = 0

→ Add 4 to both sides

∵ 4x - 4 + 4 = 0 + 4

∴ 4x = 4

→ Divide both sides by 4

∴ x = 1

→ The minimum value is f(1)

∵ f(1) = 2(1)² - 4(1) + 4

∴ f(1) = 2 - 4 + 4

∴ f(1) = 2

∴ The minimum value of f(x) is 2

7 0
3 years ago
Discounts: there are 125,000 American soldiers in Iraq . 25% are infantry. From the rest 40% are reservist. How many reservist a
Bond [772]
 there are 87350 reservist

7 0
3 years ago
If the width and length of a rectangle are both increased by 10%, by what percent does the area of the rectangle increase?
S_A_V [24]

Answer:

10%

Step-by-step explanation:

We know Perimeter of rectangle

= 2 (Length + Width)

If width and length are increased by 10%

New length= L + 10/100L = (1.1) L

New width = W + 10/100W = (1.1) W

Perimeter = 2 [(1.1) L + (1.1) W]

Perimeter = 2 (1.1) (L + W)

Perimeter = (2.2) (L + W)

Increase in perimeter = 2.2 (L + W) - 2 (L + W)

The increase in Perimeter = 0.2 (L + W)

Percent increase

= 0.2 (L + W)/2 (L + W) × 100

= 0.2/2 × 100

= 0.1 × 100

= 10%

I hope this helped and if it did, please mark as Brainliest.

7 0
3 years ago
What is the common difference between the elements of the arithmetic sequence below? –18, –22.5, –27, –31.5, –36
klasskru [66]
<span><u>Answer </u>
Common difference = -4.5

<u>Explanation. </u>
An arithmetic sequence is a sequence in which the next term is found by adding a constant to the current term. This constant is called the common difference.
If a, b, c, d, e, ….is an arithmetic sequence, then the common difference will be,
Common difference = b-a=c-b=d-c=e-d…..
Now the question above common difference is;
Common difference = (-22.5)-(-14)=-4.5 
</span>
4 2
3 years ago
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