2 years ago

Evaluate the expression for d = 3. 2(d +8)= ??

Mathematics

2 answers:

Pavel [41]2 years ago

7 0

The answer is: 22

Step by step explanation

cestrela7 [59]2 years ago

5 0

Answer:

Step-by-step explanation:

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Vikentia [17]

X=5 have a nice day :)

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2 years ago

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What is the value of b^2 - 4ac for the following equation?

WINSTONCH [101]

(7)^2-4(5)(-6)=

49+120=169 is the answer

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2 years ago

What is the solution for the equation StartFraction 5 Over 3 b cubed minus 2 b squared minus 5 EndFraction = StartFraction 2 Ove

wolverine [178]

Answer:

The solutions are:

$b=0,\:b=4$

Step-by-step explanation:

Considering the expression

$\frac{5}{3b^3-2b^2-5}=\frac{2}{b^3-2}$

Solving the expression

$\frac{5}{3b^3-2b^2-5}=\frac{2}{b^3-2}$

$\mathrm{Apply\:fraction\:cross\:multiply:\:if\:}\frac{a}{b}=\frac{c}{d}\mathrm{\:then\:}a\cdot \:d=b\cdot \:c$

$5\left(b^3-2\right)=\left(3b^3-2b^2-5\right)\cdot \:2$

$5b^3-10=6b^3-4b^2-10$

$\mathrm{Switch\:sides}$

$6b^3-4b^2-10=5b^3-10$

$6b^3-4b^2-10+10=5b^3-10+10$

$6b^3-4b^2=5b^3$

$\mathrm{Subtract\:}5b^3\mathrm{\:from\:both\:sides}$

$6b^3-4b^2-5b^3=5b^3-5b^3$

$b^3-4b^2=0$

$Using\:the\:Zero\:Factor\:Principle:$ $if\:\mathrm ab=0\:\mathrm{then}\:a=0\:\mathrm{or}\:b=0\:\left(\mathrm{or\:both}\:a=0\:\mathrm{and}\:b=0\right)$

So,

$b=0,b-4=0$

$b=0,b=4$

Therefore, the solutions are:

$b=0,\:b=4$

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2 years ago

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I think the answer is {-4,1,5,8}

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2 years ago

Suppose y varies inversely with x and that y=2 when x=8 What is an equation for this inverse variation?

bearhunter [10]

Suppose y varies inversely with x and that y=2 when x=8 What is an equation for this inverse variation?

B. y= 2/8x

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2 years ago