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Vinil7 [7]
3 years ago
9

How do you do part B of this question? Please help!!

Mathematics
1 answer:
posledela3 years ago
3 0
All i know is that the equation of a straight line  is y=mx+c .......where m= gradient and c= the y intercept
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F(x) = −(x2 + x − 72) what is the axis of symmetry and write it in standard form
Strike441 [17]
F(x) = -(x2+x-72)
y = -(x - 8)(x + 9)
the solutions are x = 8, -9; so the parabola is upside down (umbrella) crossing the x at 8 and -9, meaning that -9 + 8 = -1/2 = -0.5 is where the focus is, or x = -0.5 as the axis of symmetry
5 0
3 years ago
What is 5 (3-4x) = 7- (4-x)
a_sh-v [17]

Answer: x=4/7

Step-by-step explanation:

15-20x=x+3

15-20x-15=x+3-15

-20=x-12

-20x-x=x-12-x

-21x=-12

-21x/-21=-12/-21

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3 years ago
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Answer:

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7 0
3 years ago
What is the measure of the base in the triangle shown below?<br> A. 11<br> B. 45<br> C. 25<br> D. 30
dangina [55]

Answer:

c. 25

Step-by-step explanation:

BOTH SIDES HAVE X SO YOU PUT THEM IN A 1 EQUATION WAY AND SOLVE X:

4X+1=2X+23

4X-2X=23-1

2X=32

X= 32/2=11

THEN YOU GO TO THE BASE AND CHANGE X AND SOLVE THE EQUATION WITH X=11

3x11-8

33-8= 25=BASE

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3 years ago
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Answer:

0

Step-by-step explanation:

8 0
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