1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Setler79 [48]
3 years ago
8

1274+3599 make a ten or a hundred to add mentally

Mathematics
2 answers:
VladimirAG [237]3 years ago
6 0
Well the answer to 1274 plus 3599 = 4873. but I don't know what you are asking for?
lina2011 [118]3 years ago
5 0

1274 + 3599 \: is \: 4843
You might be interested in
According to the graph what is the value of the constant in the equation below
Trava [24]
Take the point (10,5)
5 = constant  / 10

constant = 5*10  = 50

also for the point (4 , 12.5)  constant = 4*12.5 = 50

Answer is 50 
5 0
2 years ago
Complete the square and put this function in vertex form: f(x)=x^2+20x+97
Fofino [41]

Answer:

Step-by-step explanation:

f(x)=(x²+20x+100) -3  because : 97 = 100 -  3

f(x) = (x+10)² -3 ....vertex form

3 0
3 years ago
1. Prove or give a counterexample for the following statements: a) If ff: AA → BB is an injective function and bb ∈ BB, then |ff
Fantom [35]

Answer:

a) False. A = {1}, B = {1,2} f: A ⇒ B, f(1) = 1

b) True

c) True

d) B = {1}, A = N, f: N ⇒ {1}, f(x) = 1

Step-by-step explanation:

a) lets use A = {1}, B = {1,2} f: A ⇒ B, f(1) = 1. Here f is injective but 2 is an element of b and |f−¹({b})| = 0., not 1. This statement is False.

b) This is True. If  A were finite, then it can only be bijective with another finite set with equal cardinal, therefore, B should be finite (and with equal cardinal). If A were not finite but countable, then there should exist a bijection g: N ⇒ A, where N is the set of natural numbers. Note that f o g : N ⇒ B is a bijection because it is composition of bijections. This, B should be countable. This statement is True.

c) This is true, if f were surjective, then for every element of B there should exist an element a in A such that f(a) = b. This means that  f−¹({b}) has positive cardinal for each element b from B. since f⁻¹(b) ∩ f⁻¹(b') = ∅ for different elements b and b' (because an element of A cant return two different values with f). Therefore, each element of B can be assigned to a subset of A (f⁻¹(b)), with cardinal at least 1, this means that |B| ≤ |A|, and as a consequence, B is finite.

b) This is false, B = {1} is finite, A = N is infinite, however if f: N ⇒ {1}, f(x) = 1 for any natural number x, then f is surjective despite A not being finite.

4 0
3 years ago
Show that 2x +1 is a factor of 2x3 +5x2+4x+1 and factories completely
larisa [96]

\text{According to the factor theorem, if f(b) = 0, then x-b is a factor of f(x).}\\\\\text{Given that,}\\\\f(x) = 2x^3 +5x^2 +4x +1 \\\\f\left(-\dfrac 12 \right) = 2\left( - \dfrac 12 \right)^3 +5 \left( - \dfrac 12 \right)^2 +4 \left( - \dfrac 12 \right) +1 \\\\\\~~~~~~~~~~~~=-2 \cdot \dfrac 18 + 5 \cdot \dfrac 14 -2 +1 \\\\\\~~~~~~~~~~~=\dfrac 54 -\dfrac14 -1\\\\\\~~~~~~~~~~~=\dfrac 44 -1 \\\\\\~~~~~~~~~~~=1-1\\\\\\~~~~~~~~~~~=0\\\\\text{So,}~ 2x +1 ~ \text{is a factor of f(x).}

\text{Now,}\\\\f(x) = 2x^3 +5x^2 +4x +1 \\\\~~~~~~=2x^3+x^2 +2x^2 +2x +2x+1\\\\~~~~~~=x^2(2x+1)  +2x(2x+1) +  (2x+1)\\\\~~~~~~=(2x+1)(x^2 +2x +1)\\\\~~~~~~=(2x+1)(x+1)^2

3 0
2 years ago
I need help with this problem
Mekhanik [1.2K]

Answer:

divide both sides of the equation by 2/3

5 0
3 years ago
Other questions:
  • What's the derivative of f(x)=x^3x
    9·1 answer
  • A plane starts at the origin of the coordinate plane. The plane flies 0.5 units left and 3.5 units up to point X. What are the c
    12·2 answers
  • I need help its not that hard please please please!
    8·1 answer
  • What is the total area of a right rectangular prism with a height of 8 feet, a width of 10 feet, and a thickness of 12 feet?
    6·2 answers
  • A square poster has sides measuring 2 feet less than the sides of a square sign. If the difference between their areas is 40 squ
    12·1 answer
  • What is the area of the triangle portion of one end of the roof
    6·2 answers
  • 2. The coordinate grid shows triangle RST. (x, y) - 0,-) S R. ✓ O (x,y) - (x, y) O (x,y) - (-y, x) O (x,y) - (-x, y) CLEAR ALL T
    12·2 answers
  • Lexi Moor has one index card for every letter in the alphabet. She mixes the cards up, closes her eyes, and randomly selects one
    13·2 answers
  • Need help tmr due. !!!!
    5·1 answer
  • Steve went on holiday.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!