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REY [17]
3 years ago
15

Help i dont uderstand please help :(

Mathematics
1 answer:
Scorpion4ik [409]3 years ago
8 0

Answer:

-3

Step-by-step explanation:

Plug in -3

2(-3)+3

Remember PEMDAS

Parentheses first: 2(-3)=-6

-6+3=-3

Hope this helps :)

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What is the circumference of the circle? (use 3.14 for pi)
cricket20 [7]

Answer:

C=2pi x r or pi x diameter(2xr)

50x3.14 = 157

Hope that answers your question

Step-by-step explanation:

8 0
2 years ago
Use elimination to solve this system of equations <br> x-4y=11<br> 5x-7y=-10
attashe74 [19]
First, isolate x in x-4y=11 because 1 is x's coefficient.
x-4y=11
x=11+4y
Now, substitute 4y+11 for x in 5x-7y=-10.
5x-7y=-10
5(4y+11)-7y=-10
20y+55-7y=-10
Add all coefficients.
13y+55=-10
Isolate y by subtracting 55 from both sides.
13y+55=-10
13y=-10-55
13y=-65
y=-5
Now substitute -5 for y in your first equation.
x=11+4y
x=11+4(-5)
x=11-20
x=-9
Your answer would be (-9,-5).
Any questions you may have, please contact me or comment.
8 0
3 years ago
Please answer. Geometry problem. Unit: Degrees
Zinaida [17]

Answer:

17

Step-by-step explanation:

∠C is common in both triangles

equate them

∠C = 180- (x + 100) = 180 - ( 4x + 49)

x + 100 = 4x + 49

100 - 49 = 3x

51 = 3x

x = 51/3 = 17

3 0
3 years ago
How can the point (12, 16) be explained? The highest point of the mountain defined by the function is 12 feet. The highest point
Alex

Answer:

12 is the horizontal distance and 16 is the vertical distance

4 0
3 years ago
Write the equation of a polynomial of degree 3, with zeros 1, 2 and -1 where f(0)=2
ser-zykov [4K]

Answer:

f(x) = x^3 - 2x^2 - x + 2

Step-by-step explanation:

since the zeroes are 1,-1, and 2. we can write the function like

f(x) = (x-1)(x+1)(x-2)

f(x) = (x^2-1)(x-2)

f(x) = x^3 -2x^2 -x +2

and it is true that f(0)=2

4 0
3 years ago
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