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2 years ago

Multiply out the brackets and simplify x(x3+2)

Mathematics

1 answer:

DENIUS [597]2 years ago

6 0

x4+2x is the answer Simplify the expression.

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An element with a mass of 970 g decays by 15.1% per minute how much of the element remaining after 14 minutes

Amanda [17]

The amount of the element remaining (y) in grams after time (t) in minutes is defined by the equation y=970(1-.151)^t. Substitute t=14 into the equation and solve for y. y=970(.849)^14=98.06 rounded to two decimal places.

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2 years ago

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Alex Ar [27]

Answer:

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Step-by-step explanation:

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2 years ago

tia_tia [17]

Answer:

$8-6i$

Step-by-step explanation:

Multiply out $(3-i)^2$ in order to find out which expression it is equivalent to.

1) Since the whole quantity is squared, write it out as $(3-i)(3-i)$ .

$(3-i)^2\\(3-i)(3-i)$

2) Multiply binomials by using the FOIL method. Multiply the terms that are listed first in each binomial, then the ones that are listed outermost when looking at both binomials, then innermost, and finally the last terms listed in each binomial. Simplify and combine like terms.

$(3-i)(3-i)\\9 - 3i - 3i + i^2$

$9 - 6i + i^2$

3) $i = \sqrt{-1}$ , so $i ^2$ must be $(\sqrt{-1} )(\sqrt{-1})$ . Thus, $i^2$ is equivalent to -1. Knowing this, simplify and combine like terms.

$9 - 6i + ((-\sqrt{1} )(\sqrt{-1} ))$

$9 - 6i -1\\8 - 6i$

Thus, it is equivalent to $8 - 6i$ .

6 0

2 years ago

In the diagram below of circle , diameter AB is parallel to chord CD. A. 110° B. 70° D C. 55° h D. 35° A B If mCD = 70, what is

UkoKoshka [18]

Answer:

Step-by-step explanation:

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2 years ago

There are 8 sophomores on the academic team. At the last competition, they each took the math test. Their scores were 82%, 92%,

Sav [38]

Answer:

79%

Step-by-step explanation:

To find the median, you need to arrange the numbers in ascending order. Than pick the middle number. If there are two middle numbers then you add them together and then divide by 2.

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2 years ago