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Step2247 [10]
4 years ago
13

Help please! Solve the proportion for x.

Mathematics
2 answers:
Dovator [93]4 years ago
8 0
1+3x /4= 5/2
1+3x = 5*4/2
1+3x =10
3x =9
x = 3




Paha777 [63]4 years ago
3 0
Make the denominators all the same.

LCM (4;2) = 4

\frac{1+3x}{4} =  \frac{10}{4}

Multiply both fractions for 4 to delete denominators

1+3x = 10

Move know terms to the right with changed sign

3x = 10-1

3x = 9

Since the x is multiplied for 3, divide both terms for 3

3x/3 = 9/3

x = 3
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Answer:

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<em>b</em><em>)</em><em>=</em><em> </em><em>7y-6</em>

<em>c</em><em>)</em><em>=</em><em> </em><em>6x-6</em>

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<em>e</em><em>)</em><em>=</em><em> </em><em>6x</em><em>+</em><em>9</em>

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6 0
3 years ago
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Answer: C. y=15x

Step-by-step explanation:

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3 years ago
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3 years ago
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The product of a number and 4 increased by 16 is -2
Art [367]
The answer is -4.5

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3 0
3 years ago
The sides of a triangle are x , x +1 , 2 x -1 and its area is x root of 10 .Find the value of x.
VARVARA [1.3K]


Ok, I'm going to start off saying there is probably an easier way of doing this that's right in front of my face, but I can't see it so I'm going to use Heron's formula, which is A=√[s(s-a)(s-b)(s-c)] where A is the area, s is the semiperimeter (half of the perimeter), and a, b, and c are the side lengths.

Substitute the known values into the formula:

x√10=√{[(x+x+1+2x-1)/2][({x+x+1+2x-1}/2)-x][({x+x+1+2x-1}/2)-(x+1)][({x+x+1+2x-1}/2)-(2x-1)]}

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<span>x√10=√[2x(x)(x-1)(1)]</span>

<span>x√10=√[2x²(x-1)]</span>

<span>x√10=√(2x³-2x²)</span>

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<span>Therefore, x=6 (you can't have a length of 0).</span>

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