3 years ago

FIND THE MISSING SIDE. ROUND TO THE NEAREST TENTH

Mathematics

1 answer:

dmitriy555 [2]3 years ago

8 0

Answer:

B, 16.1

Step-by-step explanation:

cos 36 = 13/x

cos 36 × x = 13

x = 13/cos 36

(Use Calculator)

x = 16.068883...

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COEFFICIENT IN THE TERM 20 IS ?

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The coefficient in this term is x^0

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3 years ago

HELP PLEASE

mario62 [17]

Answer:

26.4

Step-by-step explanation:

<u>Law Of Cosines:</u>

$cos(A)=\frac{b^2+c^2-a^2}{2bc}$

This should work for any side. This can generally be thought as:

$cos(\text{angle}) = \frac{\text{sum of squares of two other sides-opposite side squared}}{\text{2 times the product of the other two sides}}$

If this is too confusing here's the formula for the other sides (which is essentially the same, just different variables)

$cos(B)=\frac{a^2+c^2-b^2}{2ac}$

$cos(C) =\frac{a^2+b^2-c^2}{2ab}$

Anyways now just plug in the known values into the equation

$cos(A)=\frac{4^2+6^2-3^2}{2(6)(4)}\\$

Square and multiply values

$cos(A)=\frac{16+36-9}{48}$

Add the values in the numerator

$cos(A)=\frac{43}{48}$

Take the inverse of cosine on both sides

$A=cos^{-1}(\frac{43}{48})$

calculate arccosine (inverse cosine) using a calculator

$A\approx 26.384$

Round to nearest tenth

$A\approx26.4$

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2 years ago

each day mrs hewes knits 1/3 of a scarf in the morning and 1/3 of a scarf in the afternoon. How many days will it take mrs. hewe

Inga [223]

3 days as she will have knitted 2/3 on the first day, 4/3 on the 2nd day and 6/3 on the 3rd day (2 scarves) Hope this helps!

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3 years ago

Read 2 more answers

how many sides does a regular polygon have if the measure of an interior angle is 160 degrees? justify ur answer EXPLAIN HOW PLS

Afina-wow [57]

Step-by-step explanation:

Size of Interior angle = 180° - 360°/n, where n is the number of sides of the regular polygon.

We have 180° - 360°/n = 160°.

=> 360°/n = 20°, n = 18.

Therefore it is a 18-sided regular polygon.

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3 years ago

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It would be A because0.891 is 89% which is bigger than 81%,82%,and 78%

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4 years ago