Lila did it correctly. The answer is 324
Following PEMDAS, we first focus on the parenthesis. So we simplify 9-3 to get 6
So we go from
18*4^2+(9-3)^2
to
18*4^2+6^2
The next step is applying exponents. In this case, squaring the terms, so we go from
18*4^2+6^2
to
18*16+36
Next is multiplying
18*16+36
turns into
288+36
Finally, add up 288 and 36 to get 288+36 = 324
That confirms that Lila is correct
----------------------
The error that Rob made is that he computed 18*4^2+9^2-3^2 but it is NOT correct. Saying (x-y)^2 = x^2-y^2 isn't a true equation for all x and y. Again you have to simplify what is in the parenthesis first, and then you can square it. Or you must use the FOIL rule to expand out (9-3)^2
Let us assume number of n.
The number is decreased by 15.
Decreasing by 15 means, we need to subtract 15 from that number.
So, it would be come n-15.
Now, it is said that the number would become less than 2.
So, we need to setup an inequality:
n-15 is less than 2.
<h3>n-15 < 2 : required inequality .</h3>
Adding 15 on both sides, we get
n-15+15 < 2+15
n < 17.
<h3>So, we could say the number would be less than 17.</h3>
Answer:
10x + 2y - 20
Step-by-step explanation:
Answer:
3. the mode is 5 and 7
4. she tested 5
5. clare has tested 3 friends
6. 12
5 is the median for both on number 7
Step-by-step explanation:
The correct questions says 5% each year for Company 2.
The amount invested in companies A and B are; $10,000 and $2000 respectively.
<h3>Percentages on Investment</h3>
Let the amount in Company 1 be; x
Let the amount in Company 2 be; y
Hence, we have the equation;
Additionally, 6% is earned on company 1 and 50% on company 2.
Therefore, we have;
by solving the equation simultaneously;
Read more on simultaneous equations;
brainly.com/question/16863577
