# Brainiac

Most popular questions and responses by Brainiac
1. ## algebra 1

If the graph of a line has a positive slope and a negative y-intercept, what happens to the x-intercept if the slope and y-intercept are doubled? A) The x-intercept becomes 4 times larger B) The x-intercept becomes twice as large C) The x-intercept becomes

2. ## algebra 1

Find the x and y intercept of this equation: 10x-70y=210 I keep getting the wrong answer. Can you show me how to set it up and work it out?

3. ## algebra 1

If the graph of a line has a positive slope and a negative y-intercept, what happens to the x-intercept if the slope and y-intercept are doubled? A) The x-intercept becomes 4 times larger B) The x-intercept becomes twice as large C) The x-intercept becomes

1. ## Science

you round the atomic mass

posted on November 17, 2015
2. ## Math

The formula for simple interest is A = P(1 + rt) where P is the Principal (money you start with),R is the rate/percent and T is time. A = 2000(1 + .07(5)) A = 2000(1 + .35) A = 2000 (1.35) A = 700 The interest he paid should be \$700.

posted on November 17, 2015
3. ## Algebra 2

They look correct to me!

posted on November 17, 2015
4. ## math

2 + 3 + 4 + 5 + 6 = 20 (2 + 3 + 4 + 5 + 6)/5 = 4 4:20, when simplified, is 1:5 5 + 6 + 7 + 8 + 9 = 35 (5 + 6 + 7 + 8 + 9)/5 = 7 7:35 = 1:5 300 + 301 + 302 + 303 + 304 = 1510 (300 + 301 + 302 + 303 + 304)/5 = 302 302:1510 = 1:5 I promise you, the ratio will

posted on November 13, 2014
5. ## math

L = 1 W = 3 2(1) + 2(3) 2 + 6 8

posted on November 13, 2014
6. ## math

Say a b c d e are 1 2 3 4 5. 1+2+3+4+5= 15 (1+2+3+4+5)/5= 3 ratio is 3:15, or 1:5 try this with any set of numbers and it will always work

posted on November 13, 2014
7. ## algebra

Y = 1500 - 63x Create a table: 1500 - 63(0) = 1500 1500 - 63(1) = 1437 1500 - 63(2) = 1374 1500 - 63(3) = 1311 Turn them into ordered pair: (0, 1500) (1, 1437) (2, 1374) (3, 1311) Graph these points starting at the origin and go up infinitely (arrow on one

posted on October 26, 2014
8. ## algebra

a) Y = 7.5x b) slope = 7.5 = cost per guest c) 7.5(10) = \$75

posted on October 26, 2014
9. ## AP World History

Many aspects of different cultures came together through trade, which led to Greek architecture being spread, similarities in politics, and the spread of philosophical tradition.

posted on October 26, 2014
10. ## Writing

There are 21 students in each of the other 6 groups.

posted on October 26, 2014
11. ## Chemistry

Pressure is the continuous physical force exerted on or against an object by something in contact with it. There are 6563.78979 mmHg in 875.1 kilopascals.

posted on October 26, 2014
12. ## math

The formula for direct variation, which is what is indicated in the problem, is P = sqrt(q) x A. A is a nonzero value, and finding its value will help create a function. 8 = sqrt(25) x A. Solve this and you will find the value of A. Then plug that value of

posted on October 26, 2014
13. ## Algebra

i believe you are correct. the only thing you can do here is replace 2 for x.

posted on October 23, 2014
14. ## Algebra

1600 - 760 840 ----------- = --- = 42 60 - 40 20 so m = 42

posted on October 23, 2014
15. ## math

What you are doing is to the negative power. 4^3 is 64, not 1/64. however,2^-2 is 1/4 because it is a negative power. 10 + 4^3 x 2^-2 10 + 64 x 1/4 10 + 16 26 Just remember, a positive exponent is integer x integer as many times as the number indicated by

posted on October 22, 2014
16. ## math

the easiest way to do this is to divide the fractions. first turn 2 1/2 into an improper fraction, 5/4. Then find the reciprocal of 2/3. Finding the reciprocal is just flipping 2/3 upsidown and multiplying instead of dividing. 2 1/2 divided by 2/3 5/2

posted on October 22, 2014
17. ## English

the word "or" itself is a transition

posted on October 22, 2014
18. ## English

I need to know the context in which you are putting this word in. Tell me the sentence

posted on October 22, 2014
19. ## math

sorry, 18000 / 9 = ____

posted on October 22, 2014
20. ## math

total revenue divided by # of months equals monthly revenue. 1800 / 9 = ____

posted on October 22, 2014
21. ## math

you need a common denominator. you can use 25 because it is a multiple of 5. To turn the denominator, which is 5, into 25 you have to multiply it with 5. however, then you must also multiply the numerator: 2/5 x 5/5 = 10/25 10/25 + 11/25 = ____

posted on October 22, 2014
22. ## Algebra Slope Intercept Form

-5y = x-15 (-5y)/-5 = (x)/-5 - (15)/-5 y = -x/5 - -3 y = -x/5 + 3 {this can also be written -1/5(x) + 3}

posted on October 22, 2014
23. ## Algebra Slope Intercept Form

-4y=3x+20 divide all the numbers by -4 y= -3/4x - 5 you are correct

posted on October 22, 2014
24. ## Math help

6 - a + 4 - 12a - 11 6 - 11 + 4 - a - 12a -1 - 13a

posted on October 22, 2014
25. ## Algebra

The equation of a line is made up of 4 parts: the y intercept, the slope, y,and x. To find the slope, follow the formula y2-y1/x2-x1. 7-3/4-5 = 4/-1 = -4. Choose either of the ordered pairs to be your x and y. Now you have 3 = -4(5) + b. Solve for b by

posted on October 22, 2014

20 + 4x

posted on October 22, 2014
27. ## math

1 nickel is 1.95 mm thick 3 + 2 + 1 = 6 6 * 1.95 = ______ mm

posted on October 22, 2014
28. ## Science!

I know from general knowledge that oxygen has a double covalent bond, so i think A & D are 2 of the answers. Of course, I only know so much, so I could be completely wrong...

posted on October 21, 2014
29. ## algebra

The opposite of n would be the value of n with an opposite sign. If n was -3, then the opposite of n would be 3. If n was 3, then the opposite of n would be -3. Absolute value n would have a positive sign no matter what. If n was -3, absolute value n would

posted on October 21, 2014
30. ## math

Finding a square root is finding what times what equals that number. Finding a cube root is finding what times what times what equals that number. For example, the square root of 64 is 8, because 8 x 8 = 64. However, the cube root of 64 is 4, because 4 x 4

posted on October 21, 2014
31. ## math

First you need a least common denominator, which is the smallest number that is a multiple of both 5 and 6. The LCM here is 30. Now let's do this one fraction at a time. In the first fraction, 4/5, we need the denominator to become 30. You can get 30 by

posted on October 21, 2014
32. ## math

Once he eats half of the pizza, there is one half left. To find one third of one half, you have to multiply the fractions. 1/2 x 1/3 multiply the numerators together, then the denominators together. 1 x 1 ------ = ? 2 x 3 This is the same as the answer I

posted on October 21, 2014
33. ## math

Once he eats half of the pizza, there is one half left. To find one third of one half, you have to multiply the fractions. 1/2 x 1/3 multiply the numerators together, then the denominators together. 1 x 1 ------ = ? 2 x 3

posted on October 21, 2014
34. ## math

The associative property is about how numbers "associate", or group. 2.5(3x4) can also be grouped as (2.5x3)4. They both still equal 30, no matter how they look because addition and multiplication can be done in any order. The commutative property is about

posted on October 21, 2014
35. ## government

Article I, Section 8, Clause 8 of the United States Constitution, known as the Copyright Clause, empowers the United States Congress "To promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive

posted on October 20, 2014
36. ## Math

5 markers cost \$4.75. You need to find the unit rate by dividing \$4.75 by 5, which is 95 cents each. However, the question asks for the price of FOUR markers, so you have to multiple the price of an individual marker by four. .95 x 4 = \$3.80 So your answer

posted on October 20, 2014
37. ## world history

Ooooh, that's a vague question. There are a number of factors that allowed the Europeans to succeed.As far as geography goes, the moderate temperature helped with agriculture and the abundance of water allowed fishing. Many of the world's greatest thinkers

posted on October 20, 2014
38. ## math

He makes 400, and an extra 20 for each plan. If the variable Y is how much she makes, and X is the number of plans, then Y= 400 + 20X Then you just substitute how much she makes for Y, 680= 400 + 20X And solve for X.

posted on October 20, 2014
39. ## chemistry

C: In a galvanic cell the redox reaction is spontaneous and is responsible for the production of electrical energy. In an electrolytic cell, the redox reaction is not spontaneous and electrical energy has to be supplied to initiate the reaction.

posted on October 20, 2014
40. ## planning & implementing for the environment

To prevent is to keep something from occurring, so the only plausible answer would be C.

posted on October 20, 2014
41. ## Math

In decimal values, thousandths are less that hundredths. 20 thousandths are 2 hundredths, not the other way around.

posted on October 2, 2014
42. ## Technology in Day Care

Considering the subject is daycare, the only logical answer is C.

posted on October 2, 2014
43. ## Maths

Probability= action×action P= 8/20 × 7/19 (because one blue is gone) P= 56/380 P= 14/95

posted on September 23, 2014
44. ## Math

Let T be total cost, and N be number of slices: T=\$1.50N Substitute different values in for N, and arrange the input and output in a table. N.| 1 | 2 | 3 | 4 ---------------------------------- T.| 1.50 | 3 | 4.50 | 6

posted on September 23, 2014
45. ## science Help

Maybe you could ask you teacher before that class starts, saying that the question wasn't clear. Or, if your school is anything like mine, you could go to tutorials in the morning and ask. For now, take a guess so you at least have an answer, and send some

posted on September 23, 2014
46. ## english

The incredible hulk is an archetypal of Mr.Hyde from the book "Dr.Jekyll and Mr.Hyde". Also, any vampire from TV, like twilight, vampire diaries, etc. is an archetypal of the original Dracula by Beam Stoker.

posted on September 23, 2014
47. ## SCIENCE

Because work is force times distance, decreasing distance will subsequently decrease the amount of work done. The answer is B, or the second answer choice.

posted on September 23, 2014
48. ## science

Yes. If they didn't, they would go extinct. All organisms reproduce, either sexually or asexually.

posted on September 23, 2014
49. ## science Help

You didn't state whether the long haired cat is heterozygous or homozygous. It the long haired cat is hetero, then it is 25%. If it is homo, then it is 50%.

posted on September 23, 2014
50. ## FRACTION CONCEPTS

Just try different combinations of prime numbers over each other. I got three sevenths.

posted on September 23, 2014
51. ## Child care

Search "minimum square feet per day care center" on google. The second link, which should be a PDF, states that "the day care home must have a minimum of 35 square feet per child of indoor space". I am not sure if it is accurate, as different links seem to

posted on September 23, 2014
52. ## Science

My way is the easiest way, and will help you when you have numbers too big to put on a number line and count.

posted on September 23, 2014
53. ## Science

You are finding the point exactly between these points. First you must find the distance between these numbers using absolute value. In case you don't know, absolute value signs turn the answer of whatever operation that happened inside them into a

posted on September 23, 2014
54. ## Science! Help

If a parent is homozygous for a dominant trait, than that trait will trump anything the other parent has. There is a 100% chance the child will have dimples, and a 0% chance the child won't. D is correct.

posted on September 23, 2014
55. ## Math

5y^3(-x^4) 5(-1)^3(2^4) 5(-1)(16) -5(16) -80 Substitute the x and y for the values, and put them in parenthesis. This is crucial: you HAVE to use parenthesis or else the exponents and double negative will get messed up. After that, it is just order of

posted on September 23, 2014
56. ## science Help

Think of the recessive alleles as r and the dominant as R. To make sure the child definitely one hundred percent gets that trait, both parents must have the homozygous recessive trait, or the alleles rr. If they both have the alleles rr, then they both

posted on September 23, 2014
57. ## chemistry

-1560.4 KJ

posted on January 27, 2013
58. ## College Physics

V1= 25.4 v2=14.6

posted on November 28, 2010