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1 year ago

X(x - 5) = -4 Solve the equation, using the quadratic formula.

Mathematics

1 answer:

leonid [27]1 year ago

5 0

1 and 4 are the answers!

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How to to determine if two polygons have the same side and shape

sveta [45]

Recall that two shapes are congruent if they have the same shape and size. When two shapes have the same shape but different sizes, we call the shapes similar. You can also think of similar objects or shapes as scaled versions of each other.

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2 years ago

If x = 3 and y = 7 , evaluate the following expression: 20 − ( 3 y − 4 x )

xenn [34]

Answer:

20-3(7)-4(3)

20-21-12

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1 year ago

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What two numbers multiply to -126 and add up to -65

Airida [17]

Xy = -126
x + y = -65

$xy = -126$
$\frac{xy}{x} = \frac{-126}{x}$
$y = \frac{-126}{x}$

$x + y = -65$
$x + \frac{-126}{x} = -65$
$\frac{x^{2}}{x} + \frac{-126}{x} = -65$
$\frac{x^{2} - 126}{x} = -65$
$-65x = x^{2} - 126$
$0 = x^{2} + 65x - 126$
$x = \frac{-(65) \+ \sqrt{(65)^{2} - 4(1)(-126)}}{2(1)}$
$x = \frac{-65 \± \sqrt{4225 + 504}}{2}$
$x = \frac{-65 \± \sqrt{4729}}{2}$
$x = \frac{-65 \± 68.8}{2}$
$x = \frac{-65 + 68.8}{2}$ $or$ $x = \frac{-65 - 68.8}{2}$
$x = \frac{3.8}{2}$ $or$ $x = \frac{-133.8}{2}$
$x = 1.9$ $or$ $x = -66.9$

x + y = -65
  1.9 + y = -65
- 1.9   - 1.9
y = -66.9
  (x, y) = (1.9, -66.9)

or

  x + y = -65
  -66.9 + y = -65
+ 66.9 + 66.9
y = 1.9
  (x, y) = (-66.9, 1.9)

The two numbers that add up to -65 and can multiply to -126 are the numbers -66.9 and 1.9.

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2 years ago

Find the difference. 5wх² - 2wх² А. 3 В. 2wx² С. Зwх² D. 4wх²

ExtremeBDS [4]

the answer is 3wx^2

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2 years ago

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A bank offers a APR of 3.1 compound daily

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Sure does -----------------

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