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guajiro [1.7K]
3 years ago
12

Help!!!! f(x)=10x+3 g(x)= -7x-4

Mathematics
1 answer:
deff fn [24]3 years ago
8 0

Answer:

3x-1

Step-by-step explanation:

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1/x + 1/a=1/b,then x=
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\dfrac{1}{x}+\dfrac{1}{a}=\dfrac{1}{b}\ \ \ |subtract\ \dfrac{1}{a}\ from\ both\ sides\\\\\dfrac{1}{x}=\dfrac{1}{b}-\dfrac{1}{a}\\\\\dfrac{1}{x}=\dfrac{a}{ab}-\dfrac{b}{ab}\\\\\dfrac{1}{x}=\dfrac{a-b}{ab}\Rightarrow\dfrac{x}{1}=\dfrac{ab}{a-b}\to\boxed{x=\dfrac{ab}{a-b}}
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An old community soccer field, whose area is 600 yd², is enlarged by a scale factor of 9 to create a new outdoor recreation comp
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Since we are concerned with the area of the new recreation complex and are given with the scale factor, we square the given scale factor and multiply the answer with the original area. 
                                   new area = (600 yd²)(9²) 
                                                 = 48,600 yd²
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Solve the system of equations using the linear combination method.
Firdavs [7]
1. 5m+3n=41   
3m-6n=9 (multiplying the first equation by 3 and the second by 5), we get;

15m+9n=123
15m-30n= 45 (subtracting the two equations)         
39n = 78           
     n = 2, and
to get m we substitute n with 2
       3m = 9+6(2)                       
             3m = 21                   
                m = 7
Therefore, n=2 and m=7

2. 6g +8h=40
    -6g +2h = -20(Adding the two equations to eliminate g)
             10 h= 20
                 h =2 
to get g we substitute h with two
6g= 40- 8(2)
    = 24
    g= 4
Therefore, g =4 and h =2

3. 9x +5y =35
    2x + 5y =0 (subtracting the two equations to eliminate y)
           7x =35
             x= 5
To get y we substitute x with 5
5y=35-9(5)
  5y = -10
    y = -2
Therefore, x=5 and y=-2
6 0
4 years ago
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