MATHEMATICS HIGH SCHOOL

On this chapter quiz for this course you can study for up to four hours If you don't study at all you will get a 70. One hour would give you an 80, the second hour increased your score to 89, the third to 92. If you studied the fourth hour your score would be 87. In which hour did diminishing returns set in? a. The second because your gain is less than the previous hour. b. The fourth because you had a drop in points in this hour. c. The third because your score peaked there. d. The first because the score was the lowest of the studying options.

Answers

Answer 1
Answer:

Answer:

Step-by-step explanation:

Given that On this chapter quiz for this course you can study for up to four hours

Study time    Marks expected        Difference

  0                      80      

   2                     89                               9

   3                     92                               3

   4                      87                              -5

Thus we find when hours increase the scores also increase upto 3 hours but after that it starts decreasing.

Hence answer is

b. The fourth because you had a drop in points in this hour.

     

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Use the formula P = 2L + 2W to find the width of of a rectangle when the length is 34 ft and the perimeter is 112 ft.
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2/3(3x-15y)+(9y-11x)
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Somebody please help !!

Answers

Answer:

A'(6,8)

B'(6,2)

C'(2,2)

Step-by-step explanation:

You can find the vertices by finding the X and Y coordinates in the plane, after rotating it 180 degrees.

Find the area of the given circle. Round to the nearest tenth.11.0 ft^2
38.5 ft^2
42.8 ft^2
113.0 ft^2

Answers

diameter=12\ ft\n\ndiameter=2\ radius\n\n2r=12\ ft.\ \ \ /:2\nr=6\ ft.\n\nA=\pi r^2\n\nA=\pi\cdot6^2=36\pi\ (ft^2)\approx36\cdot3.14=113.04\ (ft^2)\approx113.0\ (ft^2)

What is the standard form of 46 divided-60

Answers

Answer:

This notation in parentheses is also common: 46/60 = 0.7(6): However, in daily use it's likely you come across the reptend indicated as ellipsis: 46 / 60 = 0.76… . Note that you may use our state-of-the-art calculator above to obtain the quotient of any two integers or whole numbers, including 46 and 60, of course.

Please help me with this one
10x+5y=72
15x+4y=80

Answers

I hope this helps you
Problem: Solve 10x+5y=72;15x+4y=80 Steps: I will try to solve your system of equations. 10x+5y=72;15x+4y=80 Step: Solve10x+5y=72for x: 10x+5y+−5y=72+−5y(Add -5y to both sides) 10x=−5y+72 10x 10 = −5y+72 10 (Divide both sides by 10) x= −1/2 y+36 5 Step: Substitute −1 2 y+ 36 5 forxin15x+4y=80: 15x+4y=80 15( −1 2 y+ 36 5 )+4y=80 −7 2 y+108=80(Simplify both sides of the equation) −7 2 y+108+−108=80+−108(Add -108 to both sides) −7 2 y=−28 −7 2 y −7 2 = −28 −7 2 (Divide both sides by (-7)/2) y=8 Step: Substitute8foryinx= −1 2 y+ 36 5 : x= −1 2 y+ 36 5 x= −1 2 (8)+ 36 5 x= 16 5 (Simplify both sides of the equation) Answer: x=16/5 and y=8

4(3x 5)=-4

Solve for x and show work

Answers

Answer:

x = -2 if its 4(3x + 5) = -4

OR

x = 4/3 if its 4(3x - 5) = -4

Step-by-step explanation:

Your missing an plus or minus sign.

4(3x + 5) = -4          / multiply contents of parentheses by 4

12x + 20 = -4          / subtract 20 from both sides

12x = -24                / divide both sides by 12

x = -2

OR

4(3x - 5) = -4          / multiply contents of parentheses by 4

12x - 20 = -4          / add 20 to both sides

12x = 16                / divide both sides by 12

x = 16/12              / simplify

x = 4/3

Answer: -2

Step-by-step explanation:

To solve the equation 4(3x + 5) = -4, we need to follow these steps:

Step 1: Distribute the 4 to the terms inside the parentheses.

This gives us 12x + 20 = -4.

Step 2: Subtract 20 from both sides of the equation to isolate the variable term.

We get 12x = -4 - 20, which simplifies to 12x = -24.

Step 3: Divide both sides of the equation by 12 to solve for x.

Dividing both sides by 12 gives us x = -24/12, which simplifies to x = -2.

So, the solution to the equation 4(3x + 5) = -4 is x = -2.

Elise built a rectangular vegetable garden that is 9 feet long and has an area of 72 square feet. What is the perimeter of Elise’s vegetable garden?

Answers

Well if you know how long it is, you would divide 72 by 9 giving you 8. So the perimeter wold be calculated by 9+9+8+8=34 feet
Perimeter of a rectangle=2(long)+2(width)

1)we calculate the width.
area=long x width

data:
area =72 ft².
long=9 ft

72 ft²=9 ft * width
width=72 ft²/9 ft=8 ft.

2) we calculate the perimeter.
perimeter=2(9 ft)+2(8 ft)=18 ft + 16 ft=34 ft.

Answer: the perimeter of Elise`s vegetable garden is 34 ft.
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