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irakobra [83]
3 years ago
7

If M = 5x2 + 7x – 4 and N = -3x2 - 4x + 5, what’s M-N

Mathematics
1 answer:
Dmitry [639]3 years ago
8 0

<u>Answer:</u>

If M = 5x2 + 7x – 4 and N = -3x2 - 4x + 5, then M-N= 8 x^{2}+11 x-9

<u>Step-by-step explanation:</u>

Given:

M= 5 x^{2}+17 x-4

N=-3 x^{2}-4 x+5

To find:

M-N=?

Solution:

M-N=5 x^{2}+7 x-4-(-3 x 2-4 x+5)

M-N=5 x^{2}+7 x-4+3 x^{2}+4 x-5

Rearranging the above equation

M-N=5 x^{2}+3 x^{2}+7 x+4 x-4-5

Now solving we get,

M-N=8 x^{2}+11 x-9

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What is an equation of the line that passes through the points (6, 0) and (-1, -7)?
Orlov [11]

Answer:

y = x - 6

Step-by-step explanation:

We want to write a line in slope-intercept form, which is y = mx + b, where m is the slope and b is the y-intercept.

First, we need to find the slope, which is just the change in the y-coordinates divided by the change in the x-coordinates:

slope = m = \frac{6-(-1)}{0-(-7)} =\frac{7}{7}=1

Our equation now looks like this: y = x + b

Now, to find the y-intercept, let's use one of the points provided and plug those values of x and y into the incomplete equation we have to solve for b:

0 = 6 + b  ⇒  b = -6

So, the equation is: y = x - 6.

Hope this helps!

6 0
3 years ago
Please help i can’t figure this out
UNO [17]

Answer:

C because 100 percent of 15 is 15 and 20 percent of 15 is 3

6 0
2 years ago
-3x-3y=3 and y=5x-17
Vesna [10]
The answer for this question is "y = -5/3 and x = 8/3"
5 0
3 years ago
Mrs. Howard is hosting a catered dinner party to celebrate her daughter's graduation. The catering company she plans to use char
Airida [17]
Hi there! The answer is 72 guests.

To find our answer we need to set up and solve an equation. Let the total number of guests be represented by g. The cost per guest is $13.50
Therefore the cost for all of the guests will be $13.50 × g.

To find the total cost we need to add the additional fee of $540 to cover linens and tableware.

Now we've found our equation.
13.5g + 540 = 1512

Subtract 540.
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Divide by 13.5
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Therefore, there are 72 guests. The answer is 72.
~ Hope this helps you!
8 0
3 years ago
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72 percent of 350 friends
lana [24]
We have an equation: ?/350= 72/100

Cross multiply:
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72% of 350 friends is 252 friends~
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