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3 years ago

H e l ppppppppppp

Mathematics

2 answers:

son4ous [18]3 years ago

7 0

Answer:

Step-by-step explanation:

Vikentia [17]3 years ago

3 0

Answer:

(Please vote me Brainliest if this helped!)

Letter A

Step-by-step explanation:

Pythagorean Triples $c^2=a^2+b^2$

A) Not a Pythagorean Triple

$40^2=12^2+35^2$ : 1,600 ≠ 144 + 1,225

B) Pythagorean Triple

$53^{2} = 28^{2} + 45^{2} :$ 2,809 = 784 + 2,025

C) Pythagorean Triple

$65^2= 33^2+56^2$ : 4,225 = 1,089 + 3,136

D) Pythagorean Triple

$85^{2} = 36^{2} + 77^{2}$ : 7,225 = 1,296 + 5,929

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Barak spent $20 at the mall. This represents 16% of the money he earned working at the pizza parlor last week. How much money di

Leviafan [203]

Answer: Amount of Money Barak earned last week =$125

Step-by-step explanation:

Amount of money Barak spent= $20

Amount of money spent = 16% of Money earned (X)can be represented as

16% x X =20

0.16 x X =20

X = Money earned last week = 20/ 0.16= $125

7 0

3 years ago

The point 3,4 lies on the graph of f(x)= sqrt(2x+a). Which ordered pair below lies on the graph of g(x)=1/2sqrt(2x+a)?

Rina8888 [55]

$(3;\ 4);\ f(x)=\sqrt{2x+a}\\\\\sqrt{2\cdot6+a}=4\\\sqrt{12+a}=4\ \ \ /^2\\12+a=16\\a=16-12\\a=4\\\\f(x)=\sqrt{2x+4}$

$g(x)=\frac{1}{2}\sqrt{2x+4}\\\\a)\ \left(\frac{3}{2};\ 2\right)\\R=\frac{1}{2}\sqrt{2\cdot\frac{3}{2}+4}=\frac{1}{2}\sqrt{3+4}=\frac{1}{2}\sqrt7;\ L=2;\ L\neq R\\\\b)\ \left(\frac{5}{2};\ \frac{3}{2}\right)\\R=\frac{1}{2}\sqrt{2\cdot\frac{5}{2}+4}=\frac{1}{2}\sqrt{5+4}=\frac{1}{2}\sqrt9=\frac{1}{2}\cdot3=\frac{3}{2};\ L=\frac{3}{2};\ L=R$

$c)\ (3;\ 2)\\R=\frac{1}{2}\sqrt{2\cdot3+4}=\frac{1}{2}\sqrt{6+4}=\frac{1}{2}\sqrt{10};\ L=2;\ L\neq R\\\\d)\ (27;\ 8)\\R=\frac{1}{2}\sqrt{2\cdot27+4}=\frac{1}{2}\sqrt{54+4}=\frac{1}{2}\sqrt{58};\ L=8;\ L\neq R\\\\Answer:B$

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3 years ago

Find the magnitude and direction angle of the resultant vector.

Burka [1]

9514 1404 393

Answer:

3.694∠127.8°

Step-by-step explanation:

A suitable calculator makes short work of this.

(8; 240°) +(10; 80°) ≈ (3.694; 127.8°)

_____

If you like, you can add the components of the vectors and figure the magnitude and direction of the result.

a = 8(cos(240°), sin(240°)) ≈ (-4.0000, -6.9282)

b = 10(cos(80°), sin(80°)) ≈ (-1.7365, 9.8481)

r = a + b ≈ (-2.2635, 2.9199)

|r| = √(2.2635² +2.9199²) ≈ 3.69448

∠r = arctan(2.9199/-2.2635) ≈ 127.783°

The resultant is approximately 3.694∠127.78°.

5 0

3 years ago

Wilson made punch from a recipe that called for 1 and 1/2 cups of orange juice and 3/4 Cup lemonade. Wilson used 2 and 1/4 cups

ryzh [129]

If you don't understand I am really sorry

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3 years ago

A printer need to make a poster that will have a total poster area of 200 in^2 and will have 1 inch margins on the sides, a 2-in

Katyanochek1 [597]

Answer:

The dimensions that will give the largest printed area of 132.1669 in^2 are

= Length x Width

= 15.20829 * 8.69045

Step-by-step explanation:

a) Data and Calculations:

Total poster area = 200 in^2

Side margins = 1 inch each

Top and bottom margins = 2 inches each

Let x = length of the full poster

then 200/x = width of the full poster

Therefore, the length of the printed area = x - 3.5

and the width of the printed area = (200/x)-2

Therefore, the Area of the Printed space = (x-3.5)((200/x)-2)

Solving for the Area (A) of the printed space, we have

A = (x-3.5)(-200/x2) + ((200/x)-2)

A = 700 -2x2

If the derivative is set to 0, we have:

0 = 700 -2x2

700 = 2x2

350 = x2

x = 18.70829 The original length

width = 10.69045

Therefore, the area of space available for printing is

15.20829 * 8.69045

= 132.1669 in^2

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3 years ago