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Naddika [18.5K]
3 years ago
5

Hi, please help me out :)) thank you

Mathematics
2 answers:
ra1l [238]3 years ago
7 0

Answer:

d = 32

Step-by-step explanation:

\sqrt{7d-1}   -4+4=11+4

\sqrt{7d-1} =15

7d+1=15 *15

7d+1=225

7d=225-1

7d=224

d=\frac{224}{7}

d=32

r-ruslan [8.4K]3 years ago
4 0

Answer:

d =32

Step-by-step explanation:

\sqrt{7d+1}-4=11\\\\\mathrm{Add\:}4\mathrm{\:to\:both\:sides}\\\sqrt{7d+1}-4+4=11+4\\\\Simplify\\\sqrt{7d+1}=15\\\\\mathrm{Square\:both\:sides}:\quad 7d+1=225\\7d+1=225\\\\\mathrm{Solve\:}\:7d+1=225:\\\quad d=32

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