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3 years ago

If 5x - 8 = 7, what is the value of 5x + 8?

1 answer:

muminat3 years ago

3 0

If 5x - 8 = 7, what is the value of 5x + 8?

<span>What do you get when you add (16) to both sides of the equation ??

</span><span>[5x + 8 = 23 ]
</span>
Hope I helped

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3 years ago

Write each percent as a decimal a 80% B 3% C 12.5% D 125%

Tema [17]

Answer:

a .8

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c .125

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Step-by-step explanation:

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3 years ago

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What is the value of x in the figure below

Otrada [13]

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Step-by-step explanation:

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3 years ago

Keegan is printing and selling his original design on t-shirts. He has concluded that for x shirts, in thousands sold his total

Katarina [22]

Answer:

t-shirts: 2790

profit: $12209

Step-by-step explanation:

Given the function:

p(x) = -x³ + 4x² + x

we want to maximize it.

The following criteria must be satisfied at the maximum:

dp/dx = 0

d²p/dx² < 0

dp/dx = -3x² + 8x + 1 = 0

Using quadratic formula:

$x = \frac{-b \pm \sqrt{b^2 -4(a)(c)}}{2(a)}$

$x = \frac{-8 \pm \sqrt{8^2 -4(-3)(1)}}{2(-3)}$

$x = \frac{-8 \pm 8.72}{-6}$

$x_1 = \frac{-8 + 8.72}{-6}$

$x_1 = -0.12$

$x_2 = \frac{-8 - 8.72}{-6}$

$x_2 = 2.79$

d²p/dx² = -6x + 8

d²p/dx² at x = -0.12: -6(-0.12) + 8 = 8.72 > 0

d²p/dx² at x = 2.79: -6(2.79) + 8 = -8.74 < 0

Then, he should prints 2.79 thousands, that is, 2790 t-shirts to make maximum profits.

Replacing into profit equation:

p(x) = -(2.79)³ + 4(2.79)² + 2.79 = 12.209

that is, $12209

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3 years ago

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4 years ago