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AleksAgata [21]
3 years ago
11

Solve by factoring. x2 - 49 = 0

Mathematics
1 answer:
Gelneren [198K]3 years ago
6 0
Remember
difference of 2 perfect squares
a^2-b^2=(a-b)(a+b)

(x)^2-(7)^2=(x-7)(x+7)

set to zero
x-7=0
x=7

x+7=0
x=-7

x=-7 or 7
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A printing company charges $5.00 for the first 400 pages printed. For each page printed over 400, the customer is charged an add
Vadim26 [7]

Answer:

D

Step-by-step explanation:

Up to 400 pages, the cost is fixed at 5.00 dollars

After 400 pages the cost is 0.01 cents/page

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5 0
3 years ago
the axis of symmetry for a function in the form f(x)=x^2+4x-5 is x=-2. what are the coordinates of the vertex of the graph?
Alenkasestr [34]
Hello : 
<span>f(x)=x²+4x-5
</span><span>The axis of symmetry for a function in the form f(x)=x^2+4x-5 is x=-2 :
</span>f(x) = (x+2)² + b 
f(x) x²+4x+4+b=  x² +4x-5 
 4+b= -5 
b = -9
the vertex is : (2 , -9)
4 0
3 years ago
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What value of x is in the solution set of 2x-3 &gt; 11 - 5x?
Nata [24]

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x ≤ 3

Step-by-step explanation:

7 0
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What is 11.625 rounded to the nearest whole number
Andru [333]

Answer:

your answer is 12

Step-by-step explanation:

have a great day! :)

8 0
2 years ago
XY=4x+7 and YZ=8x-1, Find XY
laiz [17]

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XZ = 12x + 6

Step-by-step explanation:

XZ = XY + YZ

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XZ = 12x + 6

5 0
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