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4 years ago

15

4a=2b-7 solve for b anyone know how to do this?

2 answers:

kkurt [141]4 years ago

8 0

Answer:

$b=2a +\frac{7}{2}$

Step-by-step explanation:

$4a=2b-7$ solve for b

To solve for b, we need to get b alone

We need to remove -7 to isolate 2b

$4a+7=2b-7+7$

$4a+7= 2b$

To get 'b' alone we divide both sides by 2

$\frac{4a}{2} +\frac{7}{2} =b$

$2a +\frac{7}{2} =b$

$b=2a +\frac{7}{2}$

choli [55]4 years ago

7 0

I know how to solve it but the value of 'a' is required for solution.

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Answer:

The value of mean is $\mu = 15.64$

Step-by-step explanation:

The normal distribution of the soft-drink dispensing machine can be stated statistically like

$X$ ~ $N (\mu ,0.191^2)$

The standard form representation is

$P(X$

Now we need to obtain $\mu$ in such a way that

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In standard form

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$P(Z>16 -\frac{\mu}{0.191} ) = 0.03$

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3 years ago

The equation a = StartFraction one-half EndFraction left-parenthesis b 1 plus b 1 right-parenthesis.(b1 + b2)h can be used to de

aleksley [76]

Answer:

The equivalent expressions are:

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Step-by-step explanation:

Given equation for finding area of a trapezoid:

$a=\frac{1}{2}(b1+b2)h\\$

where $a$ represents area, $h$ represents height and $b1\ and\ b2$ represents the base lengths of the trapezoid.

Evaluating $h$ by rearranging the equation to find an equivalent equation.

Multiplying both sides by 2.

$2\times a=2\times\frac{1}{2}(b1+b2)h$

$2a=(b1+b2)h$

Dividing both sides by $b1+b2$

$\frac{2a}{b1+b2}=\frac{(b1+b2)h}{b1+b2}$

$\frac{2a}{b1+b2}=h$

$\therefore h=\frac{2a}{b1+b2}$

Evaluating $b1$ by rearranging the equation to find an equivalent equation.

Multiplying both sides by 2.

$2\times a=2\times\frac{1}{2}(b1+b2)h$

$2a=(b1+b2)h$

Dividing both sides by $h$

$\frac{2a}{h}=\frac{(b1+b2)h}{h}$

$\frac{2a}{h}=b1+b2$

Subtracting both sides by $b2$

$\frac{2a}{h}-b2=b1+b2-b2$

$\frac{2a}{h}-b2=b1$

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ANSWER
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