<span>3[4(23)-52+7(8+42)-16]</span>
<span>3 x (4 x 8 - 52
+ 7 x (8 + 42) - 16)</span>
<span>3 x (32 - 52
+ 7 x (8 + 42) - 16)</span>
<span>3 x (16 – 52
+ 7 x (8 + 42))</span>
<span>3 x (16 - 25 +
7 x (8 + 42))</span>
<span>3 x (-9 + 7 x
(8 + 42))</span>
3 x (-9 +7 x
(8 + 16))
3 x (-9 + 7 x
24)
3 x (-9 + 168)
3 x 159
477
Using the percentage concept, it is found that 40% of Alberto’s income is used to pay for his rent and groceries.
<h3>What is a percentage?</h3>
The percentage of an amount a over a total amount b is given by a multiplied by 100% and divided by b, that is:

In this problem:
- Alberto’s monthly income is $3,200, hence b = 3200.
- He spends 896 + 384 = $1280 in rent and groceries, hence a = 1280.
Then, the percentage is given by:

More can be learned about the percentage concept at brainly.com/question/10491646
Answer:
15
Step-by-step explanation:
2:3
?:36
36/3=13
2x13=26
26:36
26+3=29
29:36
Answer:
Third option: 12x^2+8x+25
Step-by-step explanation:
s1=8x^2
s2=4x^2+15
s3=8x+10
Total perimeter of the pool edge: P
P=s1+s2+s3
Replacing s1, s2 and s3 in the formula above:
P=(8x^2)+(4x^2+15)+(8x+10)
P=8x^2+4x^2+15+8x+10
Adding like terms:
P=12x^2+8x+25