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Mashutka [201]
4 years ago
15

Can someone help with math?

Mathematics
1 answer:
algol [13]4 years ago
5 0

Answer:

A. {4,3}

Step-by-step explanation:

x -2y = -2

    y = - 3x +15

x - 2(-3x+15) = -2

x +6x - 30 = -2

7x = 28

x = 4

y = - 3x +15 = - 3*4 + 15 = -12 + 15 = 3

{4,3}

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1. Vince wants to make a square patio in his yard. He has enough concrete to pave an area of 378 square feet. How long can a sid
TEA [102]

Answer:

The length of a side can be 3·√42 ft long

Step-by-step explanation:

The question is a word problem regarding the formula for the area of a square

The parameters given are;

Available concrete = Enough to pave 378 ft.²

Shape of patio Vince wants to make = Square

Therefore, the dimensions of the sides, s, of a square patio that has an area of 378 ft.² is found as follows;

s² = 378

Therefore, s = √378 = √(9 × 42) = 3·√42 ft

Hence, the length of a side can be 3·√42 ft long.

8 0
3 years ago
Read 2 more answers
In a survey of 3,000 people who owned a certain type of​ car, 1,050 said they would buy that type of car again. What percent of
Ray Of Light [21]

Answer:

35 percent

Step-by-step explanation:

1050 / 3000 as a percent

1050 / 3000 = 105 / 300

Divide both sides by 3:

300 / 3 = 100

105 / 3 = 35

35 / 100 = 35 percent

3 0
2 years ago
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If p(x) = 2x2 – 4x and q(x) = x – 3, what is (p circle q) (x)?
mamaluj [8]

Answer:

2x^2 - 16x + 30

Step-by-step explanation:

Here, we want to get the composite function;

p•q(x)

All we have to do here is to replace the x value in p(x) by the totality of q(x)

we have this as ;

= 2(x-3)^2 - 4(x-3)

= 2(x^2 -6x + 9) - 4(x-3)

= 2x^2 -12x + 18 -4x + 12

= 2x^2 - 16x + 30

8 0
3 years ago
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9. During the past week, Mr. Hamilton gave one quiz and one exam to his high school algebra class.
Kamila [148]

<em>Missing Information:</em>

<em>It takes Mr. Hamilton 1/15  of an hour to grade one student’s exam and 1/30  of an hour to grade one  student’s quiz.</em>

Answer:

Total\ Time = \frac{x}{10}

Step-by-step explanation:

Given

Exam = \frac{1}{15}hr

Quiz = \frac{1}{30}hr

Required

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First, we need to determine the total time spent on 1 student

Time = Exam + Quiz

Time = \frac{1}{15} + \frac{1}{30}

Take LCM

Time = \frac{2 + 1}{30}

Time = \frac{3}{30}

Time = \frac{1}{10}

Next is to determine the total time on x students:

Total\ Time = \frac{1}{10} * x

Total\ Time = \frac{x}{10}

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3 years ago
What is the length of the line
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B. 7

Hope this helps! :)

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5 0
3 years ago
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