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loris [4]
3 years ago
10

ZA and ZB are complementary angles. If m A = (x – 21)° and m

Mathematics
2 answers:
pogonyaev3 years ago
7 0

Answer:

A = 21

Step-by-step explanation:

Complementary angles add to 90

x-21 + 2x-15 = 90

Combine like terms

3x -36 = 90

3x-36+36 = 90+36

3x = 126

Divide by 3

3x/3 =126/3

x = 42

We want to find ZA = x-21

A = 42-21

A = 21

Lelu [443]3 years ago
4 0

If the sum of the measures of two angles is 90° they are known as complementary angles.

<h3 /><h3>According to the question</h3>

\bf \large \longrightarrow \:  \:( x \:  -  \: 21) \:  +  \: (2x \:  -  \: 15) \:  =  \: 90 \degree

Now , Opening brackets and simplifying

\bf \large \longrightarrow \:  \: x \:  -  \: 21 \:  +  \: 2x \:  -  \: 15\:  =  \: 90 \degree

\bf \large \longrightarrow \:  \:3x \:  -  \: 36 \:  =  \: 90 \degree

\bf \large \longrightarrow \:  \:3x \:  =  \: 90 \: +  \: 36

\bf \large \longrightarrow \:  \:3x \:  =  \: 126

\bf \large \longrightarrow \:  \:x \:  =  \:  \frac{126}{3}  \\

\bf \large \longrightarrow \:  \:x \:  =  \:   \cancel\frac{126}{3}   \: \:  \large \: ^{42}  \\

\bf \large \longrightarrow \:  \: x \:  =  \: 42

Now , we have to find ZA .

  • ZA = x - 21

\bf \large \implies \:  \:A \:  =  \: 42 \:  -  \: 21

\bf \large \implies \:  \:A \:  =    \: 21

The measure of angle ZA is 21°

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The area of the triangle which is formed as described is; 60.

<h3>What is the area of the triangle formed?</h3>

According to the task content, when Point A(5,6) is reflected over the y-axis, the point B formed is; (-5,6) and when reflected over both axis, the point C formed is; (-5,-6).

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2 years ago
Use the ordinary division of polynomials to find the quotient and remainder when the first polynomial is divided by the second.
Vanyuwa [196]

The quotient and remainder when the first polynomial is divided by the second are -4w^2 - 7w - 21 and -71 respectively

<h3>How to determine the quotient and remainder when the first polynomial is divided by the second?</h3>

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This means that the remainder when -4w^3 + 5w^2 - 8 is divided by w - 3 is -71

The quotient (Q) is calculated as follows:

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The numerator can be expressed as follows:

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2 years ago
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rusak2 [61]

Answer:

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Step-by-step explanation:

This is actually pretty simple. I had trouble with this for the longest time but it makes sense to me now. A number that is a percent is equal to that number over 100.

65%=65/100

Then all you have to do is simplify! (yaaay)

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<u></u>

If you need anymore help with this or anything else just let me know!

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