I need number 7 and 8 answered

Mathematics

1 answer:

Taya2010 [7]3 years ago

7 0

The first one is the second option and the second one is the second option

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Hi, please help me out :)) thank you

r-ruslan [8.4K]

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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3 years ago

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Answer:

solution given:

balanced: C4H6O3 + H2O −−→2 C2H4O2

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It allows us to express a very small or very large number in compact form, what is this.

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Explanation:

…

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2 years ago

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Ganezh [65]

Answer:

Step-by-step explanation:

Multiply the numerator and denominator by two, you get 18/8 now if you put 16 as x, 16 + 2 = 18 and finishing the problem, you would get 18/8

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