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Simora [160]
3 years ago
11

Evaluate. -1/2y + 3 = -12

Mathematics
1 answer:
Drupady [299]3 years ago
3 0

Answer:

Y = 30

Step-by-step explanation:

hope this helps u out :)

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Which description best describes the solution to the following system of equations y = 2x + 3
OLga [1]

Answer:

The third choice, which would be:

Line y = 2x +3 intersects the line y = -x +6 .

Step-by-step explanation:

On a graph, line y = 2x + 3 and line y = -x + 6  do intersect each other, but not in the x-axis, y-axis, or at the origin.

4 0
3 years ago
How does the presence of carbon dioxide in the atmosphere help life to flourish on Earth? Choose all that apply.
hram777 [196]

Answer:

I think it's by mantaining the warm temperatures required for the life on the Earth

8 0
3 years ago
Read 2 more answers
Why is it necessary to use the absolute value of the difference when finding the distance on a number line, but not necessary wh
padilas [110]
Remember that the distance on a number line is given by the formula: d=|x_{2}-x_{1}|
where 
d is the distance between the points. 
x_{2} is the second point in the number line.  
x_{1} is the first point in the number line.
Now, suppose we are trying to find the distance between the points -1 and -5; our first point is -1, so x_{1}=-1, and our second point is -5, so x_{2}=-5. Suppose we are going to find the distance between the two point without using absolute value:
d=x_{2}-x_{1}
d=-5-(-1)
d=-5+1
d=-4
Look what we have here, a negative distance! Since distances cannot be negative, we must use absolute value to always get postie distances between two point on a umber line:
d=|x_{2}-x_{1}|
d=|-5-(-1)|
d=|-5+1|
d=|-4|
d=4 

Now, the distance between two coordinates on a plane is given by the formula: d= \sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2}
where
d is the distance between the two coordinates
(x_{1},y_{2}) are the coordinates of the first point
(x_{2},y_{2}) are the coordinates of the second point 
Notice that (x_{2}-x_{1})^2 and (y_{2}-y_{1})^2 are squared, so it doesn't matter if we get a negative distance because a negative number raised to an even power (like 2) is always positive; therefore we don't need absolute value in this case because we won't ever get a negative distance. 


7 0
3 years ago
Can someone explain or solve these || scale drawings
Readme [11.4K]

Answer:

1. 425 kilometers

2. 780 kilometers

Step-by-step explanation:

1. 50×8.5= 450 kilometers

2. 65×12=780 kilometers

4 0
3 years ago
What is the perimeter of the triangle. Please look at photo. I need you help. Thank you in advance♡​
bulgar [2K]
Answer : 12.9 units

explanation :

Sides: a = 7.616   b = 7.211   c = 13.038

Area: T = 23
Perimeter: p = 27.865
Semiperimeter: s = 13.933

Angle ∠ A = α = 29.291° = 29°17'29″ = 0.511 rad
Angle ∠ B = β = 27.597° = 27°35'50″ = 0.482 rad
Angle ∠ C = γ = 123.111° = 123°6'41″ = 2.149 rad

Height: ha = 6.04
Height: hb = 6.379
Height: hc = 3.528

Median: ma = 9.823
Median: mb = 10.05
Median: mc = 3.536

Inradius: r = 1.651
Circumradius: R = 7.783

Vertex coordinates: A[3; -1] B[16; -2] C[9; -5]
Centroid: CG[9.333; -2.667]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[3.158; 1.651]

Exterior (or external, outer) angles of the triangle:
∠ A' = α' = 150.709° = 150°42'31″ = 0.511 rad
∠ B' = β' = 152.403° = 152°24'10″ = 0.482 rad
∠ C' = γ' = 56.889° = 56°53'19″ = 2.149 rad
5 0
3 years ago
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