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3 years ago

5

Write 25.72 correct to one decimal place

2 answers:

Nina [5.8K]3 years ago

8 0

In this case you round down so that you only have 1 decimal place. you also just look at the number before the one you want to be left. if the number is 4 or less then you round down if it is 5 out more you round up. for instance 5.47 you would round up to 5.5.I hope this helped.

hichkok12 [17]3 years ago

3 0

25.7 is the answer :) Have a nice day!

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Solve this equation for x: 2x^2 + 12x - 7 = 0

zhannawk [14.2K]

Answer:

x=0.5355 or x=-6.5355

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Step-by-step explanation:

We want to solve this equation: $2x^2 + 12x - 7 = 0$

On observation, the trinomial is not factorizable so we use the Completing the square method.

Step 1: Isolate the constant term by adding 7 to both sides

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Step 2: Divide the equation all through by the coefficient of $x^2$ which is 2.

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Step 3: Divide the coefficient of x by 2, square it and add it to both sides.

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3 years ago

3. The sum of two numbers is 17. The difference between the larger number and the

Leno4ka [110]

Answer:

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Step-by-step explanation:

To solve this problem, we need to set up a system of equations. Let x represent the larger number and y represent the smaller number.

x + y = 17

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We can solve this system by adding them together. The y cancels out because y + (-y) = 0. After that, we solve for x

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Now that we know the value of x, we can substitute it into one of our original equations to solve for y.

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