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3 years ago

I=E/R + r solve for r

1 answer:

4 0

For like lower case r?

then,

I = E/R + r

multiple by R to the other side and subtract E

r= I * R - E

hope that helps

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What are the solutions of 3x2 + 14x + 16 = 0?

Leya [2.2K]

Answer:

Given the equation: $3x^2+14x+16=0$

The general equation of quadratic formula for $ax^2+bx+c=0$ where a, b and c are constant;

then, the solution for this equation is given by;

$
x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$ ......[1]

From the equation, $3x^2+14x+16=0$ we have

a =2, b=14 and c=16

Substitute these values in [1] to solve for x;

$
x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}=\frac{-14\pm\sqrt{(14)^2-4(3)(16)}}{2(3)}$

$x=\frac{-14\pm\sqrt{196-192}}{6} =\frac{-14\pm\sqrt{4}}{6}$

Simplify:

$x=\frac{-14\pm\sqrt{4}}{6} =\frac{-14\pm 2}{6}$

then,

$x=\frac{-14+2}{6} =\frac{-12}{6} =-2$ and

$x=\frac{-14-2}{6} =\frac{-16}{6} =\frac{-8}{3}$

Therefore, the solutions for the given equation is; x =-2 and $x =-\frac{8}{3}$

6 0

3 years ago

Read 2 more answers

Louie is building a scale model of an airplane, using a scale of 2 inches =

elixir [45]

Answer:

The length of the model is 12.4.

Step-by-step explanation:

2in=25ft

x=155ft

155/25=6.2

2*6.2=12.4

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3 years ago

How many integers $n$ satisfy $-4n\ge 12$ and $n+5>2$??

Dahasolnce [82]

-4n ≥ 12 ==> n ≤ -3

n + 5 > 2 ==> n > -3

But n cannot be both less than/equal to -3 AND greater than -3, so there are no integers n that satisfy these inequalities.

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3 years ago

Write the equation x2−4x=−12 in standard form. =0 Question 2 Identify the values of a,b, and c that you would use to solve the e

almond37 [142]

Answer:

The values for a, b c are:

a = 1

b = -4

c = 12

Step-by-step explanation:

In order to make it in standard form we need to swap the "-12" to the left side. When we swap numbers from one side to the other of an equation we need to invert their operation so the equation will still be valid, so in this case the number "-12" will go to the left side as "+12". We have:

x² - 4x + 12 = 0

The values for a, b c are:

a = 1

b = -4

c = 12

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3 years ago

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seraphim [82]

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3 years ago