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andre [41]
2 years ago
9

Help with#14 please!!!

Mathematics
1 answer:
Alisiya [41]2 years ago
7 0
<h3>▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪</h3><h3 /><h3><u>Question</u> : 14</h3>

let's solve for f :

  • \dfrac{1}{f}  =  \dfrac{1}{a}  +  \dfrac{1}{b}

  • \dfrac{1}{f}  =  \dfrac{b + a}{ab}

Taking reciprocal of both sides :

  • f =  \dfrac{ab}{a + b}
You might be interested in
A square scarf has a side length of 3/4 yard on each side.
denis-greek [22]

Answer:

\frac{9}{16}\ yd.^2

Step-by-step explanation:

Area of a square: a^2 = a*a

A = a^2\\\\A = \frac{3}{4}* \frac{3}{4}\\\\A =  \frac{9}{16}

Therefore, the answer of the scarf is \frac{9}{16}\ yd.^2

Hope this helps!

8 0
2 years ago
Write the numbers -2.1, -1 5/6, -1 2/3 and -2.2 in the form a/b from greatest to least
Airida [17]

Answer:

-1 5/6, 1 2/3, -2.1, -2.2

Step-by-step explanation:

Rember the numbers are neggative, then convert -1 2/3 to -1 4/6.

4 0
3 years ago
Mark wants to fence 4 rectangular gardens, each with a length of 9 1/4 feet and a width of 4 1/2 feet. What is the total length
juin [17]

Answer:

110 feet

Step-by-step explanation:

Given that,

Length of the rectangular garden = 9 1/4 feet = 37/4 feet

Width of the rectangular garden = 4 1/2 feet = 9/4 feet

We need to find the total length of fencing Mark needs to surround all 4 gardens.

The length for 1 garden = perimeter of the garden

The length for 4 garden = 4×perimeter of the garden

= 4×2(l+b)

=8(l+b)\\\\=8(\dfrac{37}{4}+\dfrac{9}{2})\\\\=8\times 13.75\\\\=110\ \text{feet}

Hence, 110 feet is the total length of the fencing Mark needs to surround all 4 gardens.

5 0
2 years ago
Solve the inequality 3x - 5 &lt; 4.
lbvjy [14]
<span>3x - 5 < 4.

Add 5 to both sides, 
3x < 9

Divide 3 from both sides, 
x < 3

Hope this helps!</span>
6 0
2 years ago
Read 2 more answers
Increase 250ml by 85%
vampirchik [111]
The easiest way to do a problem like this is to think about the fact that you have 100% and you want to add another 85%.
This is 185% of the quantity that you have.
Multiply 250 by 185% or 1.85.
250 * 1.85 = 462.5 ml
7 0
3 years ago
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