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Simora [160]
3 years ago
13

Class 8 squares and square roots without adding find the sum of a) 1+3+5+7+9+11+13+15+17.

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

Answer:

given

n=9

a=1

d=3-1=2

Step-by-step explanation:

now , by formula,

sn = n/2(2a+(n-1)d)

= 9/2(2×1+(9-1)×2)

=9/2×18

=81

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Solution of this equation sqrt x+10-9=-7
myrzilka [38]
Original equation 
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</span>Isolate
<span>√x+10 = 9-7
</span>
<span>√x+10 = 2
</span> Raise both sides to the second power
<span> (√x+10)2 = (2)2

</span> After squaring 
<span> x+10 = 4
</span>
 x + 6 = 0

so the answer is x=-6
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3 years ago
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School lunches cost ₱35.50 per week. about how much would 15.5 weeks of lunches cost?grade v​
Goryan [66]

Answer:

₱ 550.25

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5 0
3 years ago
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Simplify completely quantity x squared plus 4 x minus 45 all over x squared plus 10 x plus 9 and find the restrictions on the va
dem82 [27]
(x² + 4x - 45)/(x² + 10x + 9) 
<span>
Numerator = N = x² + 4x - 45 </span>
= x² + 9x - 5x - 45 
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= x(x + 9) - 5(x + 9) 
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<span>
Denominator = D = x² + 10x + 9 </span>
= x² + x + 9x + 9 
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<span>
Hence, the given expr. = N/D </span>
= {(x + 9)(x - 5)}/{(x + 1)(x + 9) 
= (x - 5)/(x + 1) 
<span>
Restrictions : x ≠ - 1, x = 5 </span>


I hope my answer has come to your help. Thank you for posting your question here in Brainly.
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kozerog [31]
24/6 is the amount of pictures drawn in art class. Your answer is 4
6 0
3 years ago
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exis [7]

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