All categories

3 years ago

Suzie simplified the following expression. What mistake did she make? 2(3 + 9x) - 2x 6 + 9x - 2x 6 + 7x

Mathematics

1 answer:

Levart [38]3 years ago

3 0

2(3 + 9x) - 2x

= 6 + 9x - 2x <----------------mistake right here

= 6 + 7x

Correct:

Expanding by using distributive property

2(3 + 9x) - 2x

= 2* 3 + 2 * 9x - 2x

= 6 + 18x - 2x

= 6 + 16x

You might be interested in

Find the perimeter for a square if one side measures: 7.2 cm

Makovka662 [10]

Answer:

28.8 cm

Step-by-step explanation:

Since a square's length is the same for all four sides, we have

7.2 + 7.2 + 7.2 + 7.2 or 7.2(4)

We should get 28.8 cm as our answer.

3 0

3 years ago

Read 2 more answers

Is a linear model or a quadratic model a better fit? Quadratic model graph quadratic model linear model

fomenos

Linear model is a better fit due to my evidence of doing this answer

5 0

3 years ago

The $230.00 digital camera Anne purchased was on sale for 15% off. What amount did Anne get off the price?

timama [110]

Answer: C $34.50

Step-by-step explanation: The 15% of 230 is 34.50, so the digital camera was $34.50 off.

5 0

3 years ago

Cynthia wants to take out a $8500 loan with a 4.75% APR. She can afford to pay $245 per month for loan payments. How long should

coldgirl [10]

Answer:

<em>She should borrow the money for 3.1161... years so that she can afford the monthly payment.</em>

Step-by-step explanation:

<u>Monthly payment formula</u> is: $M=P*\frac{r(1+r)^n}{(1+r)^n -1}$ , where

M = Monthly payment amount, P = Loan amount, r = rate of interest per month and n = total number of months.

Given that, Cynthia wants to take out a $8500 loan with a 4.75% APR and she can afford to pay $245 per month.

That means, $P= 8500, M= 245$ and $r= \frac{0.0475}{12}= 0.0039583$

Plugging these values into the above formula, we will get........

$245=8500*\frac{0.0039583(1+0.0039583)^n}{(1+0.0039583)^n-1} \\ \\ 245=\frac{33.64555(1.0039583)^n}{(1.0039583)^n -1}\\ \\ 245(1.0039583)^n -245=33.64555(1.0039583)^n\\ \\ 211.35445(1.0039583)^n=245\\ \\ (1.0039583)^n=\frac{245}{211.35445}=1.15919\\ \\ n= log_{1.0039583}(1.15919)=37.39327$

So, $n= 37.39327 months =\frac{37.39327}{12} years = 3.1161... years$

That means, she should borrow the money for 3.1161... years so that she can afford the monthly payment.

5 0

3 years ago

How do i solve 9j-8=8+9j

SIZIF [17.4K]

9j-8=8+9j

+8 to each side:
9j=16+9j

-9j from each side:
0=16
Which is false.

Hope this helps :)

7 0

4 years ago