MATHEMATICS HIGH SCHOOL

Which of the following ordered pairs lies on the graph of h(x) = -2x^2?(1, -4)
(1, -2)
(1, 4)

Answers

Answer 1
Answer: given, y= -2x^2;
so, when x=1, y= -2((1)^2)= -2
so pair which lie on graph is (x,y) is (1,-2)
Answer 2
Answer: From the function h(x) = -2x^2 or y = -2x^2,
when x = 1, y = -2(1)^2 = -2.

Hence, the answer is (1, -2).

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-What is the midpoint between the points (7, 3) and (-5, 5)?

Answers

Answer:

The midpoint is ( 1,4)

Step-by-step explanation:

To find the x coordinate of the midpoint add the x coordinates of the endpoint and divide by 2

( 7+-5)/2 = 2/2 =1

To find the y coordinate of the midpoint add the y coordinates of the endpoint and divide by 2

( 3+5)/2 = 8/2 =4

The midpoint is ( 1,4)

9 miles is approximately equal to 16km. How many km are equal to 63 miles? How many miles are equal to 48km?

Answers

The correct answer is 27 miles!
16 x 7 =112 so 63 miles would equal 112 km
48km equals 21.8258172

If the floor of a square office is 225 square units, what is the perimeter of the office?

Answers

The perimeter of an office whose floor area is 225 square units is 60 units

Further Explanation

Area

  • Area is a measure of how much space is occupied by a given shape.
  • Area of a substance is determined by the type of shape in question.

For example;

  • Area of a rectangle is given by; Length multiplied by width
  • Area of a triangle = 1/2 x base x height
  • Area of a circle = πr². where r is the radius of a circle,
  • Area of a square = S², Where s is the side of the square.etc.

Perimeter

  • Perimeter is defined as the distance along a two dimension shape.  Perimeter of different shapes is given by different formulas

For example;

  • The perimeter of a rectangle = 2(length+width)
  • The perimeter of a triangle = a+b+c; where a, b and c are the sides of the triangle. etc.

In this case;

We are given the area of a square as 225 square units

Therefore; since the area of a square is given as s², where s is the side of the square.

Then; s² = 225

         s = √ 225

             = 15 units

But Perimeter of a square is given by; 4 × s

Thus; Perimeter = 4 × 15 units

                           = 60 units

Keywords; Perimeter, Area

Learn more about;

Level: Middle school

Subject; Mathematics

Topic: Area and Perimeter

Square have 4 equal sides length = a

A = 255 
A = a^2

255 = a^2   |sqrt
15 = a

P = 4a 
P = 4*15 = 60

If I get a 63 on a test and it takes 20% of my grade, and I have five 100% in the class what would be my grade after the test

Answers

multiply your percentage score on the test by the percentage it is worth of the final grade.

Answer:

92.6 (A-)

Step-by-step explanation:

i used a grade calculator

Using the associative property of multiplication, which expression is equivalent to 4(7x)?A. 7(4x)

B. 28x

C. (4.7)x

D. 4(7+x)

Answers

Answer is choice A. The parentheses were moved while keeping the numbers and operation the same.

Simplify 2m - [n - (m - 2n)].

Answers

the answer to the problem is 3m-3n

Answer: the correct answer is 3m-3n
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