MATHEMATICS MIDDLE SCHOOL

In △ABC, m∠A=39 △ A B C , m ∠ A = 39 °, a=11 a = 11 , and b=13 b = 13 . Find c c to the nearest tenth.

Answers

Answer 1

Answer:

Answer:

$c=17.5\ units$

Step-by-step explanation:

step 1

Find the measure of angle B

Applying the law of sines

$(a)/(sin(A))=(b)/(sin(B))$

substitute the given values

$(11)/(sin(39\°))=(13)/(sin(B))$

$sin(B)={sin(39\°)}(13)/(11)$

$B=arcsin[sin(39\°)(13)/(11)]$

$B=48.1\°$

step 2

Find the measure of angle C

Remember that the sum of the interior angles of a triangle must be equal to 180 degrees

$A+B+C=180\°$

substitute the given values

$39\°+48.1\°+C=180\°$

$87.1\°+C=180\°$

$C=180\°-87.1\°=92.9\°$

step 3

Find the length side of c

Applying the law of sines

$(a)/(sin(A))=(c)/(sin(C))$

substitute the given values

$(11)/(sin(39\°))=(c)/(sin(92.9\°))$

$c=(11)/(sin(39\°))sin(92.9\°)$

$c=17.5\ units$

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Answers

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Answers

Hm...

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Answers

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Answer:

i think the answer is

8:22

Step-by-step explanation:

Describe how to model 2-digit by 2-digit multiplication using an area model ANSWER NOW FOR 20 POINTS

Answers

Multiply a whole number of up to four digits by a one-digit whole number, and multiply two two-digit numbers, using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models. Properties of Multiplication and Division and Problem Solving with Units of 2–5 and 10. Multiplication and Division with Units of 0, 1, 6–9, and Multiples of 10Multi-Digit Whole Number and Decimal Fraction Operations.

Answer:

The steps are shown below:

Step-by-step explanation:

We can draw the area model for 2-digit by 2-digit multiplication by using the following steps:

Step 1: First write the multiplicands in expanded form.

For example: 26 as 20 and 6, and 36 as 30 and 6.

Step 2: Now, Draw a 2 × 2 grid, and write the terms of one of the multiplicands on the top of the grid. One on the top of each cell.

Step 3: Write the terms of the other multiplicand on the left of grid.

Step 4: Write the product of ones and tens in respective cell.

For example: 26×36

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6 | 120 36

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Answers

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x=4

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