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melomori [17]
3 years ago
12

How are common denominator and a common multiple alike and different

Mathematics
1 answer:
Free_Kalibri [48]3 years ago
6 0
East common multiple is the smallest multiple both numbers can go into. (Example: the LCM of 10 and 4 is 20, because both 10 and 4 go into 20 and 20 is the smallest number both 10 and 4 can go into. You could just multiply them both, but you'd get 40 and since its a bigger number it would be harder to work with.)

Least common denominator is just the least common multiple as a denominator. (Example: if you wanted to find the LCD of 5/7 and 1/10, you'd have to find the LCM of the demoniators (7 and 10) and then just use that as the denominator when adding fractions with unlikely denominators.) Sorry for such a long answer :P
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Enter the equation of the line in slope-intercept form.
ad-work [718]

Answer:

y = \frac{7}{4}x +14

Step-by-step explanation:

Given

y = \frac{7}{4}x + 4

Required

Determine the equation of line that passes through (-8,0) and parallel to y = \frac{7}{4}x + 4

Parallel lines have the same slope.

In y = \frac{7}{4}x + 4

The slope, m is

m = \frac{7}{4}

because the general form of a linear equation is:

y = mx + b

Where

m = slope

So, by comparison:

m = \frac{7}{4}

Next, is to determine the equation of line through (-8,0)

This is calculated using:

y - y_1 = m(x - x_1)

Where

m = \frac{7}{4}

(x_1,y_1) = (-8,0)

So, we have:

y - 0 = \frac{7}{4}(x -(-8))

y - 0 = \frac{7}{4}(x +8)

y - 0 = \frac{7}{4}x +\frac{7}{4}*8

y - 0 = \frac{7}{4}x +7*2

y - 0 = \frac{7}{4}x +14

y = \frac{7}{4}x +14

6 0
3 years ago
Write an expression that is equivalent to 3(7 + 2).​
igor_vitrenko [27]

Answer:

21+3x

Step-by-step explanation:

8 0
3 years ago
Sam earned $130 last week. Jay earned $150 last week. They combined their money and decided to donate 1/5 of their total amount
defon
Jay's claim is false. They would have $156.8 left which is 56% of their original combined total. 
4 0
4 years ago
Find the length of the missing side.<br> 50 m<br> 30 m<br> The length of the missing side is<br> m.
satela [25.4K]

Answer: The missing length is 40 m.

Step-by-step explanation:

30^2 + b^2 = 50^2

900 + b^2 = 2500

-900              -900

       b^2 = 1600

b=  40

3 0
3 years ago
Use a separate sheet of paper to solve the system of inequalities by graphing. Use the graph to decide if the point (1, –1) is i
Lena [83]

Answer:

The answer is no though, the point (1,-1) is below both.

Step-by-step explanation:

So the two inequalities are y≤-3x+3 and 3x+8y≥3

With inequalities you have to know a few things.  First, when you graph you may have to use non solid lines.  for instance, if you had x<5, 5 would not be part of the answer because it is only answers less than 5.  so you represent this by making a dashed line that says "you cannot include values on this line".  Second, with algebra, if you multiply both sides by a negative it flips the inequality.  for instance -y > 54 you would multiply (or divide) by -1 and it would change to y < -54.  Third, when graphing an inequality, treat it like an equation and graph the line as if it were said equation(with solid or dashed lines as needed)  then, if it is y > f(x) you shade in the section above the line and y < f(x) shades in below.  The shaded part is your answer basically.  Now lets get into yours.

y≤-3x+3

It is already in the form y = f(x)  so grapht he line 3x + 3 with a solid line since it is y is less than or equal to,  then shade below that line.  

3x+8y≥3

First get it so y is by itself

3x+8y≥3

8y≥3 - 3x

y ≥ 3/8 - 3/8 x

Now grapht his line  with a solid line and shade the area above it.

Now, the shaded area below between y ≥ 3/8 - 3/8 x and  y≤-3x+3 and the lines are your answer, so you need to check if the point (1, -1) is in this shared shaded area or on one of the lines.

The answer is no though, the point (1,-1) is below both.

6 0
4 years ago
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