![andrewpjryan871](/avatars/24140.jpg)
andrewpjryan871
15.10.2019 •
Mathematics
Three numbers between 80 and 100 are prime numbers. what numbers are they? eight numbers between 31 and 41 are composite numbers what are they? write all the prime numbers that are odd between 30 to 50. write all the prime numbers that are even from 30 to 50. write all the composite numbers that are odd between 30 to 50. write all the composite numbers that are even between 30 to 50. describe two different ways to find 2×50×25 using mental math.
Solved
Show answers
More tips
- A Animals and plants What Do Terriers Eat?...
- F Food and Cooking Discover the Benefits and Properties of Dates...
- C Computers and Internet Dynamically Assigned IP Address: What Is It and How Does It Work?...
- S Style and Beauty How to Get Rid of Acne: Scientifically Proven Methods...
- H Health and Medicine Simple Ways to Lower Cholesterol in the Blood: Tips and Tricks...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
- A Art and Culture When Will Eurovision 2011 Take Place?...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
Answers on questions: Mathematics
- M Mathematics When 100 = 5( VC +2) is solved for c, one equation is c=(26-2)2. Which of the following is an equivalent equation to find c? C=10b-10-5 C=(10b-10-5)^2 (10b-2)^2/25...
- M Mathematics Wayne s service center operates a welding shop. Assume that the arrival of jobs follows a Poisson distribution with 2 jobs arriving in an 8 hour day. The time required...
- M Mathematics Graph the functions as transformations of f(x)=x^2 Arrange the parabolas with respect to the position of their vertices from left to right. y=f(x) y=f(x-4) y=f(x+3)...
- M Mathematics 1. A list of 8 numbers is formed such that each new number in the list is the product of the two previous numbers. Find the first number if the last three are shown:...
- M Mathematics According to a study conducted by the Toronto-based social media analytics firm Sysomos, of all tweets get no reaction. That is, these are tweets that are not replied...
- M Mathematics What is the perimeter of the nonagon below?...
- M Mathematics What is the best first step in solving Negative 4 x + two-fifths greater-than StartFraction 5 over 10 EndFraction? Add Two-fifths to both sides. Subtract Two-fifths...
- M Mathematics 8.1.8 In 2013, Gallup conducted a poll and found a 95% confidence interval of the proportion of Americans who believe it is the government s responsibility for health...
- M Mathematics Heeeeeeeeeelpppppppppppp...
- M Mathematics Compare- 6 broken bulbs out of 20 or 7 broken bulbs out of 30...
Ответ:
The primes between 30 and 50 are 31, 37, 41, 43, and 47, all of which are odd. All other numbers between 30 and 50 are composite.
To mentally find 2*50*25, you could either first multiply 25 by 2, to get 50*50, which can easily be calculated as 2500, or you could multiply the 50 by 2, for a result of 100*25, which is clearly also 2500.
Ответ:
c
Step-by-step explanation:
Given
x² + 2x = 3
To complete the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(1)x + 1 = 3 + 1
(x + 1)² = 4 ( take the square root of both sides )
x + 1 = ±
= ± 2 ( subtract 1 from both sides )
x = - 1 ± 2, hence
x = - 1 - 2 = - 3 and x = - 1 + 2 = 1