MATHEMATICS MIDDLE SCHOOL

What is the value of 6x-3y if x=5 and y=-1

Answers

Answer 1
Answer: 6x-3y\n\nx=5\ and\ y=-1\n\n6\cdot5-3\cdot(-1)=30+3=33\n\nAnswer:33
Answer 2
Answer: 6x-3y
6(5)-3(-1)
30+3
The answer is 33 hope this helps

Related Questions

I need help ASAP which line is a linear model for the data? Scatter plot on a first quadrant coordinate grid. The horizontal axis is labeled Variable A. The vertical axis is labeled Variable B. Points are plotted at (one, two), (two, nine), (three, five), (four, seven), (five, three), (six, eight), (seven, six), (eight, seven), (nine, ten). A line is drawn through point (six, eight) and point (eight, seven).Scatter plot on a first quadrant coordinate grid. The horizontal axis is labeled Variable A. The vertical axis is labeled Variable B. Points are plotted at (one, two), (two, nine), (three, five), (four, seven), (five, three), (six, eight), (seven, six), (eight, seven), (nine, ten). A line is drawn through point (three, five) and point (five, three).Scatter plot on a first quadrant coordinate grid. The horizontal axis is labeled Variable a. The vertical axis is labeled Variable B. Points are plotted at (one, two), (two, nine), (three, five), (four, seven), (five, three), (six, eight), (seven, six), (eight, seven), (nine, ten). b. line is drawn through point (one, two) and point (three, ten).Scatter plot on a first quadrant coordinate grid. The horizontal axis is labeled Variable c. The vertical axis is labeled Variable B. Points are plotted at (one, two), (two, nine), (three, five), (four, seven), (five, three), (six, eight), (seven, six), (eight, seven), (nine, ten). d. line is drawn through point (one, two) and point (nine, ten).
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In the year 2002, the world population was estimated at 6 billion people. Based on research from the World Bank, about 20% lived on less than $1 per day. How many people lived on less than $1 per day?

Answers

In the given question all the information's are provided based on which the answer to the question can be easily deduced. It is already given that the population of the world in the year 2002 was estimated to about 6 billion. Among them 20% of the people lived on an an income of less that $1 per day.Firstly let us convert 6 billion from words to numbers.
6 billion = 6000000000
Now
Number of people earning less that $1 per day = (20/100) * 6000000000
                                                                           = 6000000000/5
                                                                           = 1200000000
So the number of people earning less than $1 per day is 1200000000

Big Al, the ape, ate 100 bananas from May 1 through May 5. Each day he ate six more bananas than on the previous day. How many bananas did Big Al eat on May 5?

Answers

Set up an expression.
Each day he ate 6 more bananas, so

x will be the number of bananas he ate on the first day.
x + (x+6) + (x+6+6) + (x+6+6+6) + (x+6+6+6+6) = 100
5x +60 = 100
5x = 40
x = 8

Now on the 5th day, May 5, he ate (x+6+6+6+6), which is (8+6+6+6+6+6), which equals 38.
On May 5, he ate 38 bananas.

Eight soccer players share 7 oranges equally. What fraction do each get?

Answers

7/8 oranges for each player since 7÷8=7/8
8/7 because 7*8=7/1*8/1= and we will take the reciprical which is 7/1*1/8=7/8

A circular pan has a diameter of 8 inches. What is the exact area of the pan?
























 



A.





256π square inches
























 



B.





8π square inches
























 



C.





64π square inches
























 



D.





16π square inches

Answers

You would divide the diameter in half to get the radius which is 4. And do the formula which is a=pie(r) squared. So the answer would be 50.24
Diameter of a circle = 2r
an area of a circle =  πr²
so, if the diameter of the circular pan is 8 inches taht menas,
2r = 8
or, r = 4 inches
so area of the pan = πr² = 22/7* 4 = 12.57 inches

You score an 86 on the first of two exams. Write and solve an equation to find the score x that you need on the second exam to have a mean score of 90.

Answers

The score in the second exam is 94.

What is a Mean?

  • Mean is the average value of all the numbers in the given set.
  • Mean is calculated to get the average outcome.

Given:

Score in the first exam = 86

Mean score of two exams = 90

We have to find the score of second exam.

Let the score of second exam be x.

We know, mean is given by:

⇒ Mean = (Total score in all the exams) / (Total number of exams)

Here,

Total score in all the exams = 86 + x

Total number of exams = 2

Mean = 90             (given)

⇒ 90 = (86 + x)/2

⇒ 90 × 2 = 86 + x

⇒ 180 = 86 + x

⇒ x = 180 - 86

⇒ x = 94

Therefore, the score in the second exam is 94.

Learn more about the Mean here: brainly.com/question/15823385

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I haven't touched on mean, mode, medium, and range in a little while so I could be wrong, but if (mean) means average, i think average is adding 2 grades together then dividing the number of exams, so the average needs to be 90, so what I did was i found the difference between the original grade on the first exam, so 90-86=4, so i guessed at 94 being the next grade needed. (86+94)/2=90. 86+94=180 then divide 180 by 2 and it equals 90. so yeah your answer is 94.

A powdered drink mix is stored in a cylindrical container that has a radius of 6 centimeters and a height of 14 centimeters. Which is closest to the maximum number of cubic centimeters the container will hold?

Answers

V=area of base times height
height=height
area of base=area of circle=pir^2
V=hpir^2
r=6
h=14

V=14pi6^2
V=14pi36
V=504pi
aprox pi=3.141592
V=1583.3 round
V=1583 cm^3
Basics of a circle of radius r = 6cm
A  - area baze
A = πr² = π(6cm)² = 36πcm²
2A (upper and lower base) = 2* 36πcm² = 72πcm²

lateral surface is a rectangle . Side, and the length - lof the circle and side b is the height h of the cylinder .
l = 2πr = 2*π*6cm = 12πcm
h = 14cm
Ar -  a rectangle
Ar = l*h = 12πcm * 14cm = 168πcm²

Area cylindrical 
2A + Ar = 72πcm² + 168πcm² = 240πcm²

V = A*h = 36πcm² * 14cm = 504πcm³
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