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professor190 [17]
3 years ago
10

How to subtract fractions with unlike denominators khan academy?

Mathematics
1 answer:
Finger [1]3 years ago
6 0
First find the LCD of the denominators  then convert the fractions. Then you can subtract.

for example

2/7 - 1/4

LCD of 4 and 7 is 28 so we convert to fractions with denominator 28

1/4  = 1*7 / 4*7  = 7 /28

2/7  = 2*4 / 7*4 = 8/28


so 2/7 - 1/4  = 8 /28 / 7/28  = 1/28 answer
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Determine the vertex of the function f(x) = 3x2 – 6x + 13. 1. Identify the values of a and b. a = and b = 2. Find the x-coordina
Sveta_85 [38]
F(x)=3x²-6x+13
a=3, b=-6, c=13
the x coordinate of the vertex is x=-b/(2a), so x=-(-6)/(2*3)=1
when x=1, y=3(1)²-6(1)+13=10
the vertex is at (1,10)

answers are in bold. 
5 0
3 years ago
Read 2 more answers
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Oxana [17]

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8 0
3 years ago
What is 90 is exponential form?<br> 2^__ * 3^__ * 5^__
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3 0
3 years ago
PLEASE HELP WILL GIVE BRAINLIEST Which of the following scale factors will result in an enlargement? A. k &lt; –1 B. –1 &lt; k &
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Answer: OPTION A.

Step-by-step explanation:

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An enlargement is when dilation creates a larger image and a reduction is when dilation creates a smaller image.

When, the scale factor is greater than 1, the image is an enlargement and when the scale factor is between 0 and 1, the image is a reduction.

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Knowing this, we can say that the scale factor that will result in an enlargement is:

k

5 0
3 years ago
the area of a rectangular field is x^2-x-72m^2. the length of the field is x+8m. what is the width of the field in meters?
olga nikolaevna [1]
So first off, remember the formula for the area of a rectangle. it's length time width right? or, you could think that A= 2 things multiplied together. how can we simplify x^2 - x -72 to equal two things multiplied together? well, we can factor it! We know that one of the factors is x+8 right? so what's the other factor? it would be x-9. so, we know width is x-9. I'm not sure if you need an actual value for width. if so, I could probably go further.
7 0
3 years ago
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