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Phantasy [73]
3 years ago
11

Solve and simplify 3. (y^2-7y-5)-(-3y^2+3y-4)

Mathematics
1 answer:
yKpoI14uk [10]3 years ago
7 0

(y^2-7y-5)-(-3y^2+3y-4)=y^2-7y-5-(-3y^2)-3y-(-4)\\\\=y^2-7y-5+3y^2-3y+4

<em>combine like terms</em>

=(y^2+3y^2)+(-7y-3y)+(-5+4)=\boxed{4y^2-10y-1}

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Don't really understand this math question yet
olga_2 [115]

Arranging the given distances from sea level on the number line, we have;

  • The error made by taking Egypt as being further from the sea level is assuming that the sea level is at the beginning (left) of the number line.

<h3>How can the number line be used to find the distance from the sea level?</h3>

The given elevation of the lowest points in the six countries are;

Country. Lowest point elevation (m)

China. →. -154

Egypt →. -133

Azerbaijan → -28

Serbia. →. 35

Israel. → -408

Laos. →. 70

Sorting the above countries from the country with the lowest point below sea level to the country with the highest point above sea level gives;

Israel → -408

China → -154

Egypt → -133

Azerbaijan → -28

Serbia. → 35

Laos. →. 70

On a number line, we have;

Israel < China < Egypt < Azerbaijan < Serbia < Laos

Relative to zero, which is the sea level, points -133 and -154 are located to the left of zero.

However, point -133 > -154, therefore, -154 < -133, the symbol < represents lesser (in this case 'lower') which indicates that China (point -154) is lower or further left from zero which is the sea level than Egypt (point -133).

The error is therefore mistaking the location of the sea level as being at the extreme left of the number line, rather than at the middle.

Learn more about the number line here:

brainly.com/question/4727909

#SPJ1

7 0
2 years ago
Which set of ordered pairs represents a function?
Mrac [35]
The second one because for every x value there is one and only one y value. If you plotted the points and graphed it, you would know it is not a function if it doesn't pass the vertical line test. Notice the same x values show up repeatedly in the other ordered pairs with different y values. Only one y value for every x value
5 0
2 years ago
Find the value of x and the value of y.
astra-53 [7]
The answer is C : x = 2 rad 2 and y= 2 rad 3
4 0
3 years ago
I’m having trouble doing this one can someone finish the rest
kolbaska11 [484]

Answer:

2

Step-by-step explanation:

12-2=m(2+3)

m=10/5=2

m=2

6 0
3 years ago
Read 2 more answers
What is the LCD of 3/7x, 6/7x+7
andre [41]
I don’t really know this, but you can try this app called cymath
4 0
3 years ago
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