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Evgen [1.6K]
3 years ago
11

What are the coordinates of the midpoint between A(−3, −5) and B(2, 7) ?

Mathematics
1 answer:
natka813 [3]3 years ago
4 0
Use X1+X2 / 2, Y1+Y2 / 2
-3 + 2 / 2 , -5 + 7 / 2
-1 / 2 , 2/2
(-1/2, 1)

I think this is correct... I know you use the top formula
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Algebra2 <br>|2-3(2w+1)=7w-3(7+w)
Nezavi [6.7K]
I believe your answer is -220w-22 2-3(2w+1)=7w-3(7+w) +7w -7w 2-3(9w+1)=-3(7+w) +w -w 2-3(10w+1)=-3(7) 2-3(10w+1)=-21 -1(10w+1=-21 -21 +21 -22(10w+1) -220w-22
5 0
3 years ago
If a is a negative number, then a(1/a) is equal to -1. If a is a negative number and b is a negative number, then product ab is
Firdavs [7]

Both claims are false. In fact, a and \frac{1}{a} are one the multiplicative inverse of the other. This means, by definition of multiplicative inverse, that

a \cdot \dfrac{1}{a} = 1 \quad\forall a \in \mathbb{R}

So, it doesn't matter if a is positive or negative: the multiplication of one number and its inverse will always be 1: for example,

(-2) \cdot \dfrac{1}{-2} = \dfrac{-2}{-2} = 1

Similarly, when you multiply two number, the sign of the product depends on the sign of the factors as follows:

  • (+) \cdot (+) = (+)
  • (+) \cdot (-) = (-)
  • (-) \cdot (+) = (-)
  • (-) \cdot (-) = (+)

So, the multiplication of two negative numbers is a positive number.

8 0
3 years ago
The width of a rectangle is 1/2 of its length. What are the sides of the rectangle if its perimeter is 63 in.?
sergejj [24]

Answer:

Width is 10 1/2 inches and the length = 21 inches.

Step-by-step explanation:

Let the width be x then the length us 2x inches.

Perimeter = 2x + 2(2x) = 63

6x = 63

x = 10 1/2 inches.

5 0
3 years ago
The number of species of coastal dune plants in australia decreases as the latitude, in °s, increases. There are 34 species at 1
Bas_tet [7]

We have been given that the number of species of coastal dune plants in Australia decreases as the latitude, in °s, increases.

Further we know that there are 34 species at 11°s and 26 species at 44°s.

We can express the given information at two ordered pairs as shown below:

(n,l)=(11,34)\text{ and }(n,l)=(44,26)

Let us find slope of the line through these points:

m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}=\frac{26-34}{44-11}=\frac{-8}{33}=-0.2424

Therefore, we can write the equation of line in slope intercept form as:

n=-0.2424l+b

Where b is the y intercept, and we can find its value using one of the two points.

34=-0.2424(11)+b\\34=-2.67+b\\b=34+2.67=36.67

Therefore, the required equation of the linear function is:

n=-0.2424l+36.67

4 0
3 years ago
I need help on this thank you ​
Rasek [7]
I think it B or D I hope i don’t get it wrong
5 0
3 years ago
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