Need help on 2, b, c, and 3 please.

Mathematics

1 answer:

Svetlanka [38]2 years ago

4 0

A/Wall if you have 20 and 30 that box is missing # so you will need to times and you will get something like this 20×30=60 and that's the missing #

B/Its going to be about 768 so you need to times and if you don't get 768

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2 4 8 16 what is the rule and the sixth number in the sequence answers

aleksklad [387]

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${2}^{n}$
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${2}^{6}$
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7 0

3 years ago

-26 times a number minus 22 is equal to 90 less than the number.

IgorLugansk [536]

Answer:

$x = \frac{68}{27}$

Step-by-step explanation:

Let x be the number

Write it out: -26x - 22 = x - 90
Combine like terms: -27x + 68 = 0
Subtract 68 from each side, so it now looks like this: -27x = -68
Divide each side by -27 to cancel out the -27 next to x. It should now look like this: $x = \frac{68}{27}$

I hope this helps!

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2 years ago

Solve each triangle using the information provided. If necessary, round to the<br> nearest tenth.

Goryan [66]

Answer:

1) B = 66.5° c = 10.9

Step-by-step explanation:

I will do question one as an example. In general, for these questions you want to use the appropriate trigonometric ratios to solve for the variables and/or apply logic using rules regarding triangles. See attached image for all solving steps.

For side c, we can use Cosine of angle A for a ratio between 10 and c. When we write out the equation, we can solve for side c. So when we write it out, we get the equation:

cos23.5 = ¹⁰⁄c

c = ¹⁰⁄cos₂₃.₅

c = 10.9044 (make sure to round to the nearest tenth, which is one decimal place)

For angle B, since they have given two angles, you can solve for B since all angles of a triangle add up to 180 degrees.

So b = 180 - (90 + 23.5) = 180 - 113.5

b = 66.5

It is also possible to solve this using sine of angle B and solve it from there, but applying the theory this way is much simpler. (this is on the image if you're curious about it)

I hope this helps you with the other 3 questions.