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Maru [420]
4 years ago
15

What is the value of the expression 2x2+3xy-4y2when x=2 and y=4

Mathematics
2 answers:
postnew [5]4 years ago
6 0
I got -4 as the answer.


Eva8 [605]4 years ago
3 0
The answer is 32 .....
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If 15% of a number is 24 and 80% of the same number is 128, find 95% of that number.
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It is 152

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A newspaper carrier has $1.80 in change. He has two more quarters than dimes but three times as many nickels as quarters. How ma
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1\ quarter=\$0.25\\1\ dime=\$0.10\\1\ nickel=\$0.05\\\\q\ \ \ \rightarrow\ \ \ the\ number\ of\ the\ quarters\\d\ \ \ \rightarrow\ \ \ the\ number\ of\ the\ dimes\\n\ \ \ \rightarrow\ \ \ the\ number\ of\ the\ nickels\\\\q=2d\ \ \ and\ \ \ n=3q\ \ \ \Rightarrow\ \ \ n=3\cdot 2d=6d\\\\q\cdot0.25+d\cdot0.10+n\cdot 0.03=1.80\\\\2d\cdot0.25+d\cdot0.1+6d\cdot0.05=1.8\\\\

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3 0
3 years ago
Jena has a rope that is 4 1/4 inches long. If she divides the rope into sections that are exactly 1/4 inch in length, how many 1
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Hey there!

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8 0
4 years ago
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Mona wants to run more than 60 miles this week. She ran a total of 24 miles during the first 4 days of the week. ... Line repres
andreyandreev [35.5K]

Answer: Rate > 12 miles/day

x > 12

She must run more than 12 miles each day

Mona wants to run more than 60 miles this week. She ran a total of 24 miles during the first 4 days of the week. Which number line represents the number of miles Mona must run each day if she wants to meet her goal?

answer choices

x ≥ 10

x = 12

x > 10

x > 12

Step-by-step explanation:

To complete more than 60 miles a week.

After running 24 miles during the first 4 days

We are left with (7-4) days = 3 days

And also,

(60-24) miles to complete the weekly target

> 36 miles (more than 36miles)

Therefore, the number of miles needed to cover per day in the next 3 days is given as.

Rate > distance/time

Rate > 36miles/3days

Rate > 12 miles/day

7 0
3 years ago
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