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Deffense [45]
3 years ago
10

4. Find the solution to each equation mentally.

Mathematics
2 answers:
White raven [17]3 years ago
5 0
A, 10. b,-300. c, -1. d, -3567.
youre basically looking for the number that gets you to the other number. how far away from 30 is 40? 10. how far is 500 from 200? 300, but in the other direction so its negative. and for D since the final number is 0 just use the same number but flip the sign
KatRina [158]3 years ago
3 0

Answer:

Step-by-step explanation:

a. 30+ 10= 40              a= 10

b. 500+ (-300) = 200           b= -300

c. -1 + (-1) = -2              c= -1

SORRY IDK THE LAST ONE

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The zero of the function in A(x)=9x^2-25/3x+5 is <br><br> A. -5/3<br> B. 5/3<br> C. 5
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Read 2 more answers
Help please. Thanks in advance
anygoal [31]
Since they want only the coordinates of the vertices. You only care about where the lines intersect, the greater than, less than signs are irrelevant.

Get each equation in 'y=mx+b' form
1)  y = -x + 9
2)  y = 2x-21
3)  y = -4x +15

Now you can set any 2 equations equal to each other and solve for 'x'.
This will be the 'x' coordinate of the point where the 2 lines intersect.
You need 3 points, so you will need 3 different sets of 2 equations:

1) = 2)
2x -21 = -x+9
3x = 30
x = 10  -----> y = -(10)+9 = -1


1) = 3)
-x+9 = -4x+15
3x = 6
x = 2  -------> y = -(2) + 9 = 7

2) = 3)
2x - 21 = -4x+15
6x = 36
x = 6  ---------> y = 2(6) -21 = -9

Therefore the 3 intersecting points are:
(10,-1)
(2, 7)
(6, -9)
6 0
3 years ago
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