3 years ago

Destiny just received two separate gifts from her great-great-grandmother.

Mathematics

1 answer:

postnew [5]3 years ago

7 0

33724904249821747868hsj

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What is the solution set for x2+25=0

Masja [62]

Step-by-step explanation:

${x}^{2} + 25 = 0 \\ \therefore {x}^{2} = - 25 \\ \therefore {x} = \sqrt{ - 25} \\ \therefore {x} = \pm\sqrt{ - 1 \times 25} \\ \therefore {x} = \pm \sqrt{ 25} \times \sqrt{ - 1} \\ \therefore {x} = \pm5 \: i \\ \therefore {x} = \{ - 5i, \: \: 5i \} \: \\ is \: the \: solution \: set.$

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3 years ago

Which expression gives the prime<br> factorization of 80?<br> I need help please..

Alja [10]

The correct answer is actually choice D.

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3 years ago

Simply the variable expression below as much as possible. <br><br> 7x + (5.6) z

marta [7]

Answer:

7x + 5.6z

Step-by-step explanation:

To simplify any expression we use PEMDA ( order of operation)

Parenthesis

Exponents

Multiplication and division

Addition and subtraction

7x + (5.6) z

Here we have 5.6 inside the parenthesis

We multiply 5.6 with z

so it becomes 5.6z

7x + 5.6 z

Both terms 7x and 5.6z have different variable so they are not like terms

We cannot combine unlike terms, so we leave as it is

7x + 5.6z

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3 years ago

1. What is the approximate world population? There are 7.674 billion people on earth.

almond37 [142]

Answer:

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Step-by-step explanation:

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The cost of 5 cans of dog food is $4.35. At this price, how much do 11 cans of dog food cost?

Mice21 [21]

Answer:

9.57

Step-by-step explanation:

4.35 / 5 = 0.87

0.87 x 11 = 9.57

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3 years ago

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