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4 years ago

Lin is 7 years younger than Adrian,

Mathematics

1 answer:

jeka944 years ago

5 0

Answer: Age of Lin is 12

Solution:

Let X= age of Maya

(X/2)+4= age of Adrian

((X/2)+4)-7= age of Lin

X+(X/2)+4+((X/2)+4-7)=61

X+.5X+4+.5X+4-7=61

2X+4+4-7=61

2x=61-8+7

2X=60

X=30 age of Maya

19= age of Adrian

Age of Lin is

=((X/2)+4)-7

=15+4-7

=12

To check if this is correct

30+19+12=61

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marshall27 [118]

Answer:

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Step-by-step explanation:

The equation of a line is $y = mx + b$ , with $m$ being the slope and $b$ being the y-intercept.

We can see on the graph that the y-intercept, where the line crosses or touches the y-axis, is 100. So, our new equation is $y = mx + 100$ .

Now we have to find the slope. Let's pick a point that's clearly on the graph. Perhaps (3, 150). And then we'll take the y-intercept point for convenience, (0, 100).

Then, we'll use $\frac{y_{2} - y_{1}}{x_{2} - x_{1} }$ to find the slope.

Let's substitute in our points.

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Simplify.

$\frac{50}{3}$

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We'll put that in our equation for a line and...bam!

$y = 16\frac{2}{3} x + 100$ or $y = \frac{50}{3} + 100$

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3 years ago

Solve the equation <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B8%7Dx%20-%2017%20%3D%2010" id="TexFormula1" titl

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Answer:

x = 72

Step-by-step explanation:

To solve for 'x', isolate it. This means to keep 'x' on one side of the equal sign, while moving the other numbers to the other side. The numbers on the other side will tell you what 'x' equals to.

When 'moving' a number to the other side, you cancel it out where it originally is by doing reverse operations. (Reverse operation pairs are addition/subtraction and division/multiplication). To keep an equation balanced, what you do to one side you have to do to the other.

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$\frac{3}{8}x-17+17=10+17$ Add 17 to both sides. "-17" cancels out on the left.

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$\frac{3}{8}x/\frac{3}{8}=27/\frac{3}{8}$ Because 3/8 originally multiplies with 'x', do the reverse: divide both sides by 3/8.

$x=27/\frac{3}{8}$ To divide a fraction, change to multiplication and flip the fraction's top and bottom numbers.

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3 years ago

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Step-by-step explanation:

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