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3 years ago

What is the value of b2 - 4ac for the following equation? x(x 8) = 9

1 answer:

4 0

If you would like to know the value of b^2 - 4 * a * c, you can calculate this using the following steps:

x * (x + 8) = 9
x^2 + 8x - 9 = 0
ax^2 + bx + c = 0

a = 1
b = 8
c = - 9

D = b^2 - 4 * a * c = 8^2 - 4 * 1 * (-9) = 64 + 4 * 9 = 64 + 36 = 100

The correct result would be 100.

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Step-by-step explanation:

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3 years ago

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96.408 I used a calculator

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Which of the following functions best represents the graph?

marshall27 [118]

Answer:

$f(x)=x^3+x^2-4x-4$

Step-by-step explanation:

From the graph, the x-intercepts are;

$x=-2$

$x=-1$

$x=2$

These are root of the polynomial function represented by the given graph.

By the remainder theorem;

$f(-2)=0,f(-1)=0,f(2)=0$

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This implies that;

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We expand using the distributive property to get;

$f(x)=x^3-4x+x^2-4$

Rewrite in standard form to obtain;

$f(x)=x^3+x^2-4x-4$

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3 years ago

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Tobi Foods grocery began the year with 300 boxes of cookies with a unit cost of $1.89. During the year, the following additional

Flura [38]

we know that

The first-in-first-out method (FIFO), states that the earliest costs (first costs) are assigned to cost of goods sold and the remaining costs (the more recent costs) are assigned to ending inventory.

The FIFO method assumes that the earliest-goods purchased are sold first.

in this problem

Part a) cost of ending inventory

Find the total cost

Total cost=200*$2.1+400*$2.2+250*$2.4=$1,900

Find the cost of ending inventory

475-250=225 boxes

Cost of ending inventory=225*$2.20+250*$2.40=$1,095

therefore

the answer Part a) is

The cost of ending inventory is $1,095

Part b) cost of goods sold

we know that

The cost of goods sold is equal to the total cost minus the cost of ending inventory

cost of goods sold=$1,900-$1,095=$805

therefore

the answer part b) is

The cost of goods sold is $805

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3 years ago

How do you solve this?

Savatey [412]

Step-by-step explanation:

to "solve" this I need an equation.

this whole expression must be equal to something.

without that I can only try to simplify the expression.

remember that

a/b / c/d = ad / bc

so, here we have

3a/(((a²/x) - 1)(a/x - 1)) = 3a/(a³/x² - a²/x - a/x + 1) =

= 3a/(a³/x² - a²/x - a/x - a/a) =

= 3a/((a²/x² - a/x - 1/x - 1/a)×a) = 3/(a²/x² - a/x - 1/x - 1/a)

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2 years ago