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Deffense [45]
4 years ago
15

How do you subtract unlike fractions?

Mathematics
1 answer:
nasty-shy [4]4 years ago
5 0
You find the LCM of the denominators in the fractions, then you multiply both fractions as needed till both have like denominators. Then you subtract.

For example:

5/9 - 2/4

LCM of 9 and 4 is 36

[(5 x 4)/(9 x 4)] - [(2 x 9) - (4 x 9)]
= 20/36 - 18/36
20/36 - 18/36 = 2/36
2/36 = 1/18

hope this helps ya!
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Points!! Help PLEASE!!!!!!!!!!!!!!!!! I've been stumped forever!:( Point estimate? Poll's margin of error? Fill in the blanks:
Brut [27]
The point estimate is the mid-point of the interval:
\frac{.35+.43}{2} = \frac{.78}{2} = 0.39

The margin of error is the difference between the endpoints of the interval and the mid-point.
0.43 - 0.39 = 0.04 = 4\%
8 0
3 years ago
The base of a right circular cone has a radius of 4 inches and a slant height of 9 inches. If the radius and the slant height ar
ioda

Answer:

Correct option: B -> 36

Step-by-step explanation:

The surface area of a circular cone is given by the formula:

Surface area = pi * radius * (radius + slant height)

If the inicial radius is 4 in and the slant height is 9 in, we have:

Surface area = pi * 4 * (4 + 9) = 52pi in2

The radius and the slant height are multiplied by 6, so we have:

radius = 6 * 4 = 24 in

slant height = 6 * 9 = 54 in

So the new surface area is:

New surface area = pi * 24 * (24 + 54) = 1872pi in2

The factor of the surface areas is:

New surface area / Surface area = 1872pi / 52pi = 36

Correct option: B

3 0
4 years ago
What is the sum 2/6+7/6
galben [10]
9/6 or the simplified version is 1 1/2
6 0
3 years ago
Read 2 more answers
If g=27 and f=54degrees, find h on a triangle. a. h=15.9. b. =14.9. c. 16.9. d. 18.9
sattari [20]
I assume h is the hypotenuse on a triangle. We use trigonometric functions in order to find the value of h. Also, since side g is not specified whether it is adjacent or opposite angle f. We solve using every possible function and see from the choices the correct answer.

h = 27 sin 54 = 21.84
h = 27 cos 54 = 15.9

Therefore, most likely the correct answer is A.
4 0
4 years ago
Given f(x) =
sergejj [24]

Answer:

A

Step-by-step explanation:

We are given the function:

\displaystyle f(x) = \left\{        \begin{array}{ll}            2\cos(\pi x) \text{ for }  x \leq -1 \\ \\          \displaystyle   \frac{2}{\cos(\pi x)}\text{ for } x > -1        \end{array}    \right.

And we want to find:

\displaystyle \lim_{x\to -1}f(x)

So, we need to determine whether or not the limit exists. In other words, we will find the two one-sided limits.

Left-Hand Limit:

\displaystyle \lim_{x\to-1^-}f(x)

Since we are approaching from the left, we will use the first equation:

\displaystyle =\lim_{x\to -1^-}2\cos(\pi x)

By direct substitution:

=2\cos(\pi (-1))=2\cos(-\pi)=2(-1)=-2

Right-Hand Limit:

\displaystyle \lim_{x\to -1^+}f(x)

Since we are approaching from the right, we will use the second equation:

=\displaystyle \lim_{x\to -1^+}\frac{2}{\cos(\pi x)}

Direct substitution:

\displaystyle =\frac{2}{\cos(\pi (-1))}=\frac{2}{\cos(-\pi)}=\frac{2}{(-1)}=-2

So, we can see that:

\displaystyle \displaystyle \lim_{x\to-1^-}f(x)=\displaystyle \lim_{x\to -1^+}f(x) =-2

Since both the left- and right-hand limits exist and equal the same thing, we can conclude that:

\displaystyle \lim_{x \to -1}f(x)=-2

Our answer is A.

8 0
3 years ago
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