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andrew11 [14]
2 years ago
7

Help with this pls.

Mathematics
1 answer:
scoundrel [369]2 years ago
8 0

Answer:

y={9, -2, -35}

Step-by-step explanation:

2*3^2 -3*3=9

2*-2^2 -3*-2=-2

2*-5^2 -3*-5=-35

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The plumber wants to cut a 24-ft length of pipe into three sec- tions. The largest piece should be twice the length of the middl
lisabon 2012 [21]

Answer: Length of smallest piece is 3.43 feet.

Length of middle piece is 2× 3.43 = 6.86 feet

Length of largest piece is 4× 3.43 = 13.72 feet.

Step-by-step explanation:

Let the length of smallest piece be x

According to question, the middle piece is twice the length of the smallest piece.

So, length of middle piece be 2x

According to question, the largest piece is twice the length of the middle piece.

So, length of largest piece be 2(2x)=4x

Total length of pipe = 24 ft

So, it becomes,

x+2x+4x=24\\\\7x=24\\\\x=\dfrac{24}{7}\\\\x=3.43\ ft

Length of smallest piece is 3.43 feet.

Length of middle piece is 2× 3.43 = 6.86 feet

Length of largest piece is 4× 3.43 = 13.72 feet

4 0
3 years ago
Last night, Roberto spent 90 minutes doing homework, infinity symbol hour reading, and 540 seconds making his lunch for the next
statuscvo [17]

The correct question is;

Last night, Roberto spent 90 minutes doing homework, 2/3 hour reading, and 540 seconds making his lunch for the next day. How many more minutes did Roberto spend doing homework than he did reading and making his lunch? 81 minutes 50 minutes 49 minutes 41 minutes

Answer:

41 minutes

Step-by-step explanation:

We are given;

Time spent on homework = 90 minutes

Time spent reading = 2/3 hours = 2/3 × 60 minutes = 40 minutes

Time spent making lunch = 540 seconds = 540/60 minutes = 9 minutes

We want to find how many more minutes Roberto spent doing homework than he did reading and making his lunch.

Thus;

Time spent on reading and making lunch = 40 + 9 = 49 minutes

Hence, the word "how many more" means we will subtract 49 from 90.

So, "how many more minutes" = 90 - 49 = 41 minutes

6 0
3 years ago
Question 4.<br> Which percent is equivalent to 3/8?<br> A) 375%<br> B) 3.75%<br> C) 37.5%
amm1812
3/8 = 0,375
0,375 * 100% = 37,5 %
6 0
4 years ago
Someone pls help it’s due later
Dvinal [7]

Answer:

5.)Z=7

Check:

6.) False

True

Step-by-step explanation:

5z-10=25

5z-10+10=25+10

5z=35

5z/5=35/5

z=7

<u>Check:</u>

5(7)-10=25

35-20=25

25=25

(Love your profile picture)

8 0
3 years ago
Read 2 more answers
Robert is entering a contest at a local radio
lbvjy [14]

Answer:

Robert has a 59% chance of winning.

Step-by-step explanation:

I had this question on a test once, and I got it right.

Plz can I have brainliest plzzzzz

5 0
4 years ago
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