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malfutka [58]
3 years ago
12

Round 630 to the nearest hundred

Mathematics
1 answer:
RSB [31]3 years ago
4 0
600 is the answer...........
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Prove:1/sin²A-1/tan²A=1​
Anit [1.1K]

Step-by-step explanation:

1/sin^2A -cos^2A/sin^2 A. ~tan = sin/cos

(1-cos^2)/sin^2A. ~ take lcm

sin^2A/sin^ A. ~ 1-cos^2A = sin^2A

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3 years ago
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What is the equation of the line shown in the graph? (-3,1) (2,-4)
ki77a [65]

Answer:

x + y = -2

Step-by-step explanation:

The two primary equations to remember when dealing with graphing 2-variable equations are: ax + by = c (a & b are the x & y coefficients, respectively), and the other is y = mx + c (m = slope, x & y represent themselves). There is another equation to find the slope. If not already known, it's: ∆y/∆x {∆(aka Delta) = difference}. So, since that's all been established, we can proceed to calculate your question:

1) Find your slope: 1 - (-4) = 5 for your y-variable. And -3 - 2 = -5 for your x-variable. So your slope = 5/-5 = -1

2) Use the y = mx + c equation together with either set of (x,y) coordinates to get the equation 1 = (-1)(-3) + c. Which gives you c = -2

3) So, going back to the main equation to remember, the ax + by = c, use a one of your given sets of x,y coordinates and input your known values for x, y, & c to get: a(-3) + b(1) = (-2) and do the same with other set (these are just double-checks, coefficients are all equal to 1 anyways). So, you should arrive to the equation: x + y = -2

4 0
2 years ago
Which of the ordered pairs are functions
kap26 [50]

Answer:

c

Step-by-step explanation:

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3 years ago
Y = x - 4<br><br> y = 4x + 2<br><br> x =<br> y =
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Answer:

x=-2 y=-6

Step-by-step explanation:

x-4=4x+2

subtract x from both sides

-4=3x+2

subtract 2 from both sides

-6=3x

divide by 3 on both sides

x=-2

y=-2-4=-6

y=4(-2)+2=-8+2=-6

8 0
3 years ago
What’s the triangle congruence shortcut
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Answer:

D. All those resources can be found in Africa

7 0
3 years ago
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