3 years ago

Simplify -3c+5d+3c-d

Mathematics

2 answers:

Rina8888 [55]3 years ago

8 0

Answer:

$4d$

-3x+3c+5d-d

=0+4d

=4d

EastWind [94]3 years ago

4 0

Answer:

Step-by-step explanation:

-3c+5d+3c-d

=-3c+3c+5d-d

=4d

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Answer:

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Step-by-step explanation:

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4 years ago

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hodyreva [135]

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3 years ago

Use sigma notation to represent the following series for the first 10 terms. 3+ (-6) +12+(-24)

pshichka [43]

Answer: - 1023

Step-by-step explanation:

Given

Sequence is $3+(-6)+12+(-24)...$

The following sequence is a geometric series with common ratio $r=-2$

first term $a=3$

$Sum=\sum _{i=1}^{n}ar^{n-1}=\dfrac{a(1-r^n)}{1-r}$

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3 years ago

4. Find the value of x in the right triangle below.<br> 60°

antiseptic1488 [7]

Answer:

Step-by-step explanation:

It is worthwhile memorizing the ratios of legs in a 30°–60°–90° triangle. Shortest to longest, the ratios are ...

1 : √3 : 2

Then the sides marked will have the ratio ...

6 : x = 1 : 2 = 6 : 12

x = 12

_____

You can also get there using trigonometry.

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3 years ago