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3 years ago

1/a+1/b=c solve for b how would i do this

1 answer:

8 0

a cheap way to go about it is, let's do away with the denominators, and we'll do so by simply multiplying both sides by the the LCD of all fractions, in this case, that'd be "ab", so we multiply both sides by "ab".

$\bf \cfrac{1}{a}+\cfrac{1}{b}=c\implies\stackrel{\textit{multiplying both sides by }\stackrel{LCD}{ab}}{ab\left( \cfrac{1}{a}+\cfrac{1}{b} \right)=ab(c)}\implies b+a=abc \\\\\\ a=abc-b\implies a=\stackrel{\textit{common factor}}{b(ac-1)}\implies \cfrac{a}{ac-1}=b$

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Hi could somebody help me

alexandr402 [8]

Assuming both vertical lines are parallel and assuming I'm supposed to find all the unmarked angles...

Angle C:

Supplementary Angles.

x+36=180

180-36=x

x=144

Angle B:

Corresponding Angles.

Angle B ≅ Angle C

144

Angle A:

360 degrees in a quadrilateral

36+144+81+x=360

261+x=360

x = 99

Hope it helps <3

5 0

3 years ago

Which Value Is The Eighth Term In The Sequence? A. -3125 B. -125 C. -625

statuscvo [17]

Answer:

Step-by-step explanation:

Substitute n = 8 into the explicit rule

$a_{8}$ = - $\frac{1}{125}$ × $5^{7}$

= - $\frac{1}{5^{3} }$ × $5^{7}$

= - $5^{4}$ = - 625 → C

6 0

3 years ago

Once again I’m co fused lol

Leno4ka [110]

A to the middle one

B to the top one

C to the bottom one

The top one is all real numbers because any number in the "l l" absolute brackets will come out to be positive, example: l-3l=3 and l3l=3. Thats going to be equal to and since the sign says "less than or equal to" that will work.

The middle one is only positive solutions because for 7x to be more than lxl it would need to be positive since the sign is "greater than"

The bottom one is none because the absolute of anything will always be more than a negative since the absolute is always positive. Never less or equal to a negative, always more.

7 0

3 years ago

Rearrange to make x the subject 4(x-3)/a=y

klio [65]

Answer:

Answer: x = a*y + 3

Step-by-step explanation:

To make x the subject of the equation, first, we open the bracket

4x - 12/a = y

Then cross multiply:

4x - 12 = a * y ( a*y means the product of the two variables)

Add 12 to both sides of the equation

4x = a*y + 12

Divide both sides by 4 to get the value of x

x = a * y + 12/4

x = a*y + 3

3 0

3 years ago

PLZ HELP ASAP SIMILARITY

RSB [31]

CD/DB=AC/AB
DB=3.8; AC=4.6; AB=6.8
CD/3.8=4.6/6.8
Solving for CD:
CD=3.8*4.6/6.8
CD=2.570588235
Rounded to one decimal place:
CD=2.6

Answer: The length of CD is 2.6

6 0

3 years ago