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VARVARA [1.3K]
3 years ago
6

1 (6x + 21) - 4x = 15

Mathematics
1 answer:
valina [46]3 years ago
7 0

Answer:

7

Step-by-step explanation:

It is seven since fist, you add like terms. then you divide ALL by three.

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What is the solution to the system? <br><br> (___,___)
Rina8888 [55]
For the first line we have a slope of (y2-y1)/(x2-x1)

(2--2)/(1--1)=4/2=2 so we have:

y=2x+b, now solve for b with either of the points, I'll use: (1,2)

2=2(1)+b

b=0 so the first line is:

y=2x

Now the second line:

(1-10)/(4--2)=-9/6=-3/2 so far then we have:

y=-3x/2+b, using point (4,1) we solve for b...

1=-3(4)/2+b

1=-6+b

b=7 so 

y=-3x/2+7 or more neatly...

y=(-3x+14)/2

...

The solution occurs when both the x and y coordinates for each are equal, so we can say y=y, and use our two line equations...

2x=(-3x+14)/2

4x=-3x+14

7x=14

x=2, and using y=2x we see that:

y=2(2)=4, so the solution occurs at the point:

(2,4)


6 0
3 years ago
Can someone please help me as soon as possible!
Elena-2011 [213]
Ed = 96 but switch the numbers
6 0
3 years ago
What is obtained by squaring the standard deviation?
anastassius [24]
<h2>Answer:</h2>

Variance

<h2>Step-by-step explanation:</h2>

The standard deviation is related to the variance. The standard deviation measures the variation or dispersion of a set of data and is represented by the Greek letter sigma \sigma, while the variance measures how far a set of  numbers are spread out from their average value. The variance is obtained by squaring the standard deviation, so the variance can be found as \sigma^{2}

3 0
3 years ago
Answer to : <br> Factorise this <br> 6x squared -5x - 125
IrinaK [193]
Hello!!

= 6x^2 - 5x - 125

= x (6x - 5) - 125

= (6x + 25) (x - 5)

Good luck :)
8 0
3 years ago
. Decide whether each of these questions is statistical or non-statistical. How much sugar is in this cookie? ​
vovikov84 [41]

Answer:

i think its statistical

Step-by-step explanation:

4 0
3 years ago
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