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choli [55]
3 years ago
9

(3x)2 – 7y2, when x = 3 and y = 2

Mathematics
2 answers:
denis23 [38]3 years ago
4 0

3 \times 3 \times 2 - 7 \times 2 \times 2 \\ 18 - 28 \\  - 10

baherus [9]3 years ago
3 0

Answer:

115

Step-by-step explanation:

(3x)^2 – 7y^2

Plug in:

(3×3)^2 – 7×2^2

9^2 - 14^2

81 - 196

115

Hope this helped.

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David scored points less than six times the number of points Rich scored in a video game. If represents the number of points sco
UkoKoshka [18]

Answer:

David scored : 24 < 6x = 0

Step-by-step explanation:

From the information given;

David  scored ??? points less than six times the number of points Rich scored in a video game.

If  ???   represents the number of points scored by Rich

The objective is to write an expression representing the number of points scored by David.

since the value of David points and Rich letter representing the number of points scored by RIch  are not given,  Let's based our calculation on assumptions, the main thing is to understand the the process in solving the question.

Assumption:

Let assume that,

David scored 24 points and x should be the number of points scored by Rich

Then; the linear equation representing David score is:

David scored : 24 < 6x = 0

3 0
3 years ago
If the population of a certain city increased 25% in two years, the new population was what percent of the old?
disa [49]

Answer:

125%

Step-by-step explanation:

This because if in origin the city was made up for example by 100,000 people, that was the 100% of the city. Now you add the 25% in two years and the city will be made by 125,000 people. So <em>100%+25%=125%</em><em>.</em><em> </em>

I think it's right

7 0
3 years ago
Round 224.91 to the nearest whole number. Do not write extra zeros.
yarga [219]

Answer:

225

Step-by-step explanation:

3 0
3 years ago
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What is the coefficient of the expression:<br> 3n+4
umka2103 [35]

Answer:

The coefficient is 3, the number right before the variable.

4 0
3 years ago
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If u subtract 17 from my number and multiply the difference by -7, the result is -35.What is my number
Kryger [21]

Let x = your number.

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(x - 17) = 5. Add 17 to each side.

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5 0
3 years ago
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