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Artyom0805 [142]
2 years ago
12

Juwan went on a bike ride of 36 miles. He realized that if he had gone 15 mph faster, he would have arrived

Mathematics
1 answer:
Alexandra [31]2 years ago
4 0

Step-by-step explanation:

Distance = (Rate)(Time) So, Time = (Distance)/(Rate)

Time at slower speed = Time at faster speed + 3

36/x = 36/(x+6) + 3

Multiply the equation by the LCD, x(x+6) to obtain:

36(x+6) = 36x + 3x(x+6)

36x + 216 = 36x + 3x2 + 18x

3x2 + 18x - 216 = 0

x2 + 6x - 72 = 0

(x + 12)(x - 6) = 0

x = -12 or x = 6

Since x can't be negative, x = 6 mph

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Find the remaining side of a 45° – 45° – 90° triangle if the shorter sides are 2/3 each .
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Answer:

The length of the longer side is 2√2/3

Step-by-step explanation:

A 45-45-90 triangle is a right-angled triangle.

In fact, since it has two angles equal, it is a right angled isosceles triangle. What we are saying is that two of its sides are equal.

Hence, we have two short sides which are the opposite and the adjacent and a longer side which is the hypotenuse

Thus, to find the length of the longer side, we employ Pythagoras’ theorem and it states that the square of the hypotenuse equals the sum of the squares of the two other sides;

Mathematically, let’s call the longer side x

so x^2 = (2/3)^2 + (2/3)^2

x^2 = 4/9 + 4/9

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3 years ago
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Answer:

The correct answer is B ; Karla must determine the area of a floor in her house.

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The triplets, nick, Brian, and dan, exit their preschool classroom every day in a random order. Create an organized list to show
AfilCa [17]

The set of all possibilities is called sample space and is denoted by S.

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E = {NBD} and n(E) = 1

The probability of an even is defined by p(E) = \frac{n(E)}{n(S)}

Hence,  p(E) = \frac{1}{8}

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kakasveta [241]

i can't really see the image but i'm sure it's pretty cool (:

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3 years ago
X+2(x+3(x+4(x+5)))=153
Allushta [10]

Answer:

x=1

Step-by-step explanation:

Here first open the inner parentheses and use the distributive property,

4(x+5)=4x+20\\\\(x+4(x+5))=(x+4x+20)=(5x+20)\\\\3(x+4(x+5))=3(5x+20)=15x+60\\\\(x+3(x+4(x+5)))=(x+15x+60)=16x+60\\\\2(x+3(x+4(x+5)))=2(16x+60)=32x+120\\\\x+2(x+3(x+4(x+5)))=x+32x+120=33x+120\\\\\\Hence\ x+2(x+3(x+4(x+5)))=x+32x+120=33x+120\\\\\Rightarrow 33x+120=153\\\\33x=153-120\\\\33x=33\\\\x=1

3 0
3 years ago
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