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3 years ago

10

Tyler took $20 out of his checking account 6 days in a row while he was on vacation. Which integer shows the total change in his

checking account balance for those days?

2 answers:

Marizza181 [45]3 years ago

8 0

Answer:

120

Step-by-step explanation:

20 x 6 = 120 which will be subtracted by his balance. hence the change.

Allushta [10]3 years ago

4 0

Answer:

-$160

Step-by-step explanation:

20*6=160

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12

Step-by-step explanation:

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The Sum Of Two Numbers Is 50 And The Difference Is 18. What Are The Numbers?

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<span>The sum of two numbers is 50. The smaller number is 18 less than the larger number. What are the numbers?
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Equations:
x + y = 50
x = y - 18
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3 years ago

Solve for x in the equation.

labwork [276]

Answer:

The solution is $\displaystyle x=1\pm \sqrt{47}$ . Fourth option

Explanation:

Solve for x:

$2x^2+3x-7=x^2+5x+39$

Move all the terms from the right to the left side of the equation, a zero in the right side:

$2x^2+3x-7-x^2-5x-39=0$

Join all like terms:

$x^2-2x-46=0$

The general form of the quadratic equation is:

$ax^2+bx+c=0$

Solve the quadratic equation by using the formula:

$\displaystyle x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

In our equation: a=1, b=-2, c=-46

Substituting into the formula:

$\displaystyle x=\frac{-(-2)\pm \sqrt{(-2)^2-4(1)(-46)}}{2(1)}$

$\displaystyle x=\frac{2\pm \sqrt{4+184}}{2}$

$\displaystyle x=\frac{2\pm \sqrt{188}}{2}$

Since 188=4*47

$\displaystyle x=\frac{2\pm \sqrt{4*47}}{2}$

Take the square root of 4:

$\displaystyle x=\frac{2\pm 2\sqrt{47}}{2}$

Divide by 2:

$\displaystyle x=1\pm \sqrt{47}$

First option: Incorrect. The answer does not match

Second option: Incorrect. The answer does not match

Third option: Incorrect. The answer does not match

Fourth option: Correct. The answer matches exactly this option

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3 years ago