3 years ago

Help with rational equations

Mathematics

1 answer:

Sunny_sXe [5.5K]3 years ago

7 0

Change all the terms so that they have a common denominator

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If dave buys a sample of 70 nails and 6 are bad and 64 are good and he needs 2500 good nails how many nails should dave buy

dexar [7]

Answer:

$Dave\ should\ buy\ 2735\ nails.$

Step-by-step explanation:

$Number\ of\ nails=70\\\\Good\ nails=64\\\\percentage\ of\ good\ nails=\frac{good\ nails}{total\ nails}\times 100\\\\percentage\ of\ good\ nails=\frac{64}{70}\times 100\\\\percentage\ of\ good\ nails=91.42857\%\\\\Let\ for\ 2500\ good\ nails\ he\ has\ to\ buy\ x\ nails\\\\91.42857\%\ of\ x=2500\\\\\frac{91.42857}{100}\times x=2500\\\\x=\frac{2500}{0.9142857}=2734.375\\\\x\approx 2735$

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3 years ago

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tankabanditka [31]

Answer:

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Step-by-step explanation:

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2 years ago

For the function f(x) = x2 + 3 what is the value of f(-4)?

hodyreva [135]

Answer:

f(-4) = -5

Step-by-step explanation:

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3 years ago

Read 2 more answers

Find point A ( x, y ) if point B is ( 6 , 10 ) and the midpoint between A and B is ( -4,5)

IgorC [24]

Answer:

(14,0)

Step-by-step explanation:

slope 10/5 or 2

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3 years ago

Solve this quadratic equation using the quadratic formula.<br> 5 - 10x - 3x2 = 0

Olegator [25]

-3x^2 - 10x + 5 = 0

Quadratic formula:

-b +/- sqrt[b^2 - 4(a)(c)]/2(a)

So. . . 10 +/- sqrt[(10^2) - 4(-3)(5)]/2(-3)

10 +/- sqrt[100+60]/ -6

10 +/- sqrt[160]/-6

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2 years ago