3. Solve the equation. -3 2/5 + b = 8 1/5

Mathematics

2 answers:

Elanso [62]2 years ago

6 0

3) D. 11 3/5
4) C. 18
5) D. 5/12 feet

user100 [1]2 years ago

3 0

Answer:

3) b= 11 3/5

4) n= 1/18

5) 5/12 feet

Step-by-step explanation:

3) add -3 2/5 to both sides

4) multiply both sides by 3n, divide by -42, then divide 7/42 by 3 (or multiply it by the reciprocal: 1/3)

5) convert the height to inches by multiplying by 12, subtract 69 from 74, then divide answer by 12

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8_murik_8 [283]

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Given that,

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$\mathrm{Solve\:with\:the\:quadratic\:formula}\\\\\mathrm{For\:a\:quadratic\:equation\:of\:the\:form\:}ax^2+bx+c=0\mathrm{\:the\:solutions\:are\:}\\\\x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}\\\\\mathrm{For\:}\quad a=1,\:b=1,\:c=-7\\\\x =\frac{-1\pm \sqrt{1^2-4\cdot \:1\left(-7\right)}}{2\cdot \:1}$