Answer:
Terms must have the same variable (letter) and the same exponent (little number)
(7x² +3y+ 5) +(9x²+11y- 2)
Opening bracket
7x²+3y+5+9x²+11y-2
keeping like terms together
7x²+9x²+3y+11y+5-2
Since terms having same variable and exponent can be subtracted, added,divided and multiplied
So
Solving like terms we get
<u>16x²+14y+3</u> which is a correct answer.
I think one of the answers would be 9.82
Hello there BeGuiLE !
To solve your question, we must first bring 'h' to one side of the equation. Let's bring all the terms with the variable 'h' to the left side of the equation. So,

→ 
Now, let's combine the 2 terms containing the variable 'h'.

→ 
Now, we need to leave the variable 'h' alone in the left side of the equation & bring (√3 + 1) to the other side of the equation. This is done in order to make 'h' as the subject of the equation. So, we'll get it as,

→ 
Now, let's rationalize it. Rationalizing is a process where we move the root from the denominator of a fraction to the numerator for easier calculation. So,

→ 
Now, use the algebraic identity, (a + b)(a - b) = a² - b²
→ 
→ 
→ 
Now, we've made 'h' as the subject of the equation. If you want to solve it more, then,

Take √3 as 1.73 (approx. value up to 2 decimal places)
→ 
→ 
→
I hope this will help you.
Please refer to the attached image if the explanation shows some error.
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Check out more links which will help you understand the topic better :
■ brainly.com/question/21406377
■ brainly.com/question/696184
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3 weeks and 3 days is the answer. This is bc 21/7 is 3. And the left over is 3