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3 years ago

5•11+5•(-4)=5(11-4) wich property?

Mathematics

1 answer:

ludmilkaskok [199]3 years ago

3 0

Answer:

Step-by-step explanation:

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Solve this quadratic equation. Show all work. 4x^2-2x-5=0

kicyunya [14]

X= -b⁺₋ √b²-4ac/2a
x= (-(-2)⁺₋√(-2)²- 4(4)(-5))/2(4)
x= 4 ⁺₋√4+80/8
x= (4⁺₋ 9.165)/8
x= 4+9.165)/8 or x= 4-9.165)/8
x= 1.40 or x= -0.896

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3 years ago

An interior angle of a regular polygon has a measure of 135° how many sides does it have

butalik [34]

8 sides

the exterior angle = 180° - 135° = 45° ( exterior/ interior are supplementary )

the sum of the exterior angles of a polygon = 360°

number of sides = $\frac{360}{45}$ = 8

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3 years ago

There are two non congruent triangles where B=55 degrees a=15 and b=13. Find the measures of the angles of the triangle with the

liq [111]

Answer:

The side c needs to be 12.85 for the triangle to have greatest perimeter

Step-by-step explanation:

We are given;

b = 13

a = 15

Angle at b: B = 55°

Let's find side c.

Using the law of cosines,we have;

b² = a² + c² - 2ac•cos(B)

13² = 15² + c² - 2•15•c•cos(55)

169 = 225 + c² - 30c•cos(55)

c² - 30c•cos(55) + 225 - 169 = 0

c² - 30c•cos(55) + 56 = 0

c² - 30c•(0.5736) + 56 = 0

c² - 17.208c + 56 = 0

Using quadratic formula;

c = [-(-17.208) ± √((-17.208)² - (4•1•56)]/2(1)

c = [17.208 ± √(296.115 - 224)]/2

c = 8.604 ± 4.246

To have the greater perimeter, we need the larger value of c, thus we will use the positive sign and ignore the negative one ;

Thus,

c = 8.604 + 4.246 = 12.85

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3 years ago

Please help me with the correct answer Solve (x - 3)^2=5

Rus_ich [418]

The answer is B. First solve the parentheses. Then make a quadratic equation and solve from there.

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2 years ago

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What does equal to 1+1?

Fudgin [204]

Answer:

Step-by-step explanation:

because look, 1+1 = 2 but if u add 2 to 1 u get 21 together.

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2 years ago

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5•11+5•(-4)=5(11-4) wich property?​

5•11+5•(-4)=5(11-4) wich property?