MATHEMATICS HIGH SCHOOL

the us postal service delivered 7.14 x 1010 pieces of mail in the month of december and 3.21 x 1010 in the month of january. What is the total mail delivered for these two months?a) 1.035 x 109 b) 1.035 x 1010 c) 1.035 x 10-10 d) 1.035 x 1011 someone help fastt!

Answers

Answer 1

Answer:

The postal service delivered:

7.14 × 1010 pieces of mail in December

3.21 × 1010 pieces of mail in January

Total number of mail delivered is;

(7.14 + 3.21) × 1010

= 10.35 × 1010

= 1.035 × 10100 (in one decimal point form)

Answer 2

Answer:

Answer:

The correct answer for this problem is

d) 1.035 x 10^11

Step-by-step explanation:

I know this because I just did the test

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How to find the value of this expression
Answer this please, I really need help
The width, w, of a rectangle garden is x - 2. The area of the garden is x^3 - 2x - 4. What is an expression for the length of the garden?a. x^2 -2x - 2 b. x^2 + 2x - 2 c. x^2 - 2x + 2 d. x^2 + 2x + 2
If x= 1/2-√3 , prove that x³-2x²-7x+5=3

Use the lim f(x)-f(a)/x-a to find the derivative. x->a

f(x)=-3x^2-5x+1 and point (1,-7)

Answers

Hello,

f(x)-f(a)= -3x²-5x+1-(-3a²-5a+1)=-3(x²-a²)-5(x-a)=-3(x-a)(x+a)-5(x-a)
=-(x-a)(3(x+a)+5)
=-(x-a)(3x+3a+5)

lim (f(x)-f(a))/(x-a)=- lim (3x+3a+5)=3a+3a+5=-6a-5
if a=1==>-6*1-5=-11

Otherwise
f'(x)=-6x-5
f'(1)=-6-5=-11

at point(1,-7)

Find a value for k such that the following trinomial can be factored x^2-8x+k

Answers

Answer:

Step-by-step explanation:

x^2-8x+k is a quadratic expression of the form ax^2 + bx + c. Here a = 1, b = -8 and c = k. Focus on x^2-8x and complete the square as follows: Take half of the coefficient of x (that is, take half of -8) and square the result:

(-4)^2 = 16; if we now write x^2-8x+ 16, we'll have the square of (x - 4): (x -4)^2.

Thus, k = 16 turns x^2-8x+k into a perfect square.

Pupils at a scholl either arrive by bus,car or on foot. 3/10 walk and 1/3 come by bus. What fraction come by car?

Answers

the total of the pupils are the 100%, or in fraction mode, 1, the whole, so we have:
bus + car + foot = total
1/3 + car + 3/10 = 1
car = 1 - 3/10 - 1/3
car = 1 - (9/30 + 10/30)
car = 30/30 - 19/30
car = 11/30
that is the fraction that come by car

What is the equation of a line that is perpendicular to the line that goes through the points (0, -3) and (-3, 12)?y = 15x + 2
y = (-1/15x) - 8
y = -9x - 7
y = (1/5x) - 3

Answers

Hello,

Slope of the line passing through the points:
m=(12+3)(-3-0)=-5
Slope of the perpendicular: 1/5

==> Answer D.

Markus scored 85, 92, 82, and 94 on the first four tests of the semester. His teacher has not yet told him his score on his fifth test, but did tell him that his score on the fifth test is five points lower than the average (arithmetic mean) of all five tests. Which equation could Markus use to determine the score of the fifth test, x?

Answers

The answer is B. 5(x + 5) = 353 + x

(For anyone who needs it now)

Answer: B. 5(x + 5) = 353 + x

Step-by-step explanation:

The diagonal of a tv is 28 inches long. Assuming that this diagonal forms a pair of 30-60-90 right triangles, what are the exact length and width of the tv?

Answers

30-60-90

shortest leg is always x ; longest leg is always x√3 ; hypotenuse is always 2x

hypotenuse = 28 inches = 2x = 2(14)
shortest leg = x = 14
longest leg = x√3 = 14√3

The exact length and width of the tv would be 14 inches and 14√3 inches.

Answer:

14 inches by 14 square root of 3 inches

Step-by-step explanation:

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