3 years ago

A plumber charges $50 for a house call plus an additional $12 per hour for labor

Mathematics

1 answer:

velikii [3]3 years ago

6 0

$62 is both numbers added together

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Uma atleta percorreu cinco oitavos de uma pista e ainda precisa percorrer 75 quilômetros para completar seu percurso . Quantos q

ivolga24 [154]

Answer:

The athlete will run 200 kilometers.

A atleta percorrerá 200 quilômetros no total.

Step-by-step explanation:

She will run x kilometers.

She has already run 5/8 of the distance(5/8 of x), and still needs to run 75 kilometers.

$\frac{5x}{8} + 75 = x$

$x - \frac{5x}{8} = 75$

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The athlete will run 200 kilometers.

A atleta percorrerá 200 quilômetros no total.

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3 years ago

The area of a square can be tripled by increasing the length and width by 10 inches. What is the original length of the square?

trapecia [35]

The new square has length: 10 + l, where l is the original length of the square, and it's area is (10 + l)^2;
So, we solve the equation: 3 x l^2 = (10 + l)^2;
Then, 3 x l^2 = 100 + 20 x l + l^2;
Finally, 2xl^2 - 20xl - 100 = 0; / ÷2;
l^2 - 10l - 50 = 0 (we use the quadratic equation formula);
The only positive solution is l = 5(1+ \sqrt{3} );

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3 years ago