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4 years ago

Find any real solutions for the following equations x3 = - 64

Mathematics

1 answer:

Alex777 [14]4 years ago

8 0

Hello,

x^3+64=0
==>(x+4)(x²-4x+16)=0
==>x=-4 because x²-4x+16 is not factorable in R.

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For what values (cases) of the variables the expression does not exist: a / a−b

Sliva [168]

Answer:

a=b

Step-by-step explanation:

When the denominator is zero, the expression is undefined

a-b=0

a=b

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3 years ago

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3 years ago

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4 years ago

Evaluate the expression.

Gemiola [76]

Answer:

98 is the answer of the expression

Step-by-step explanation:

AS it is a simple algebraic expression so these are solved by BDMAS rule which means that we have to solve the brackets first starting from the smaller bracket first which is inside a larger bracket then we will move to Division then multiplication then addition and then subtraction

so the following equation can be written as

= $2^{3}[\frac{1}{4}+4(36/12)]$

First of all solving smallest bracket and division inside it

= $2^{3}[\frac{1}{4}+4(3)]$

Multplying 4 inside

= $2^{3}[\frac{1}{4}+12]$

Now solving the 2³

= $8[\frac{1}{4}+12]$

Now solving the expression inside the bracket by taking LCM

= $8[\frac{1 + 4*12}{4}]$

= $8[\frac{1 + 48}{4}]$

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Now multiplying 8 with inside values

= $[\frac{8*49}{4}]$

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7 0

3 years ago

Two trains leave a city at 3 P.M. One train goes east at a constant rate of 70 mph. The other goes west at a rate of 62 mph. How

andrey2020 [161]

Answer:

4 hours

Step-by-step explanation:

The general formula for distance, rate and time is:

d = rt, where distance is the product of rate multiplied by time

Given that one train is moving at a rate of 70 mph and one is moving at a rate of 62 mph in the opposite direction, the combined distance over time is equal to 528 miles. Using the variable 't' for time:

70t + 62t = 528

Combine like terms: 132t = 528

Divide both sides by 132: 132t/132 = 528/132 or t = 4 hours

8 0

3 years ago

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