Answer:
D. 9 + 4√5
Step-by-step explanation:
What we're essentially doing here is squaring 2 + √5. (2 + √5 and 2 + 1√5 are essentially the same)
(2 + √5)(2 + √5) <em>(I didn't put the one on the conjugate for a reason; look above)</em>
<em>Step 1: Apply the distributive property by multiplying each term of 2 + √5 by 2 + √5</em>
4 + 2√5 + 2√5 + (√5)²
<em>Step 2: Combine 2√5 and 2√5 to get 4√5.</em>
4 + 4√5 + (√5)²
<em>Step 3: The square of √5 is 5.</em>
4 + 4√5 + 5
<em>Step 4: Add 4 and 5 to get 9.</em>
9 + 4√5 is the final answer to this question.
D. (9x40)-(9x25) because it's the amount of pink yarn minus the white to find out how much more was used
Answer:
56 students
Step-by-step explanation:
The equation for your question is 85+2x=197. First you would have to subtract 85, on both sides, leaving you with 2x=112. Then, you'd have to divide by 2 on both sides to isolate the variable. From there, you're left with x=56.
The answer is f, non of the above.
To find the half of 2330, simply divide by 2 or 1/2.
Which gives you 1165.