1. Math

The 3rd and 7th terms of an A.P are -1 and 11 respectively. Fine the nth term and the numbers of which must be added to get a sum of 430

2. Pre Calculus

Find all $2 \times 2$ matrices $\bold{A}$ that have the property that for any $2 \times 2$ matrix $\bold{B}$, $\bold{A} \bold{B} = \bold{B} \bold{A}.$

3. College Algebra

Sarah left on the interstate at a speed of 60 mph. Her sister followed her on the same route, leaving 2 hours later at a rate of 65 mph. How long will it take for Sarah's siter to catch up with Sarah?

4. Social Studies

Which of the following statements best summarizes the information provided on the chart? (1 point) The Articles of Confederation gave too much power to the individual state governments. Most of the Articles of Confederation’s weaknesses related to the

5. Algebra

A small jet can fly 1008 miles in 4 hours with a tailwind but only 832 miles in 4 hours into a headwind. Find the speed of the jet in still air.

6. College Algebra

The Jones family took a 24-mile canoe ride down a river in two hours. After lunch the return trip back up the river took four hours. Find the rate of the canoe in still water.

7. ela

1. In “Raymond’s Run,” which detail supports the prediction that Squeaky will not let Gretchen win the race? (1 point) I put * marks by ones I thought Squeaky is insulted when Mr. Pearson suggests she give someone else “a break” this year.

8. Maths

How to write 17m 80cm using decimals

1. what is the plural form of libro? a. libros b. libroes c. libroces d. libriones 2. what is the plural form of la television? a. la televisions b. los televisiones c. las televisiones d. el televisions

10. Math-3 Questions

Hi. Check my answers? Thanks? Also, if I got any wrong, explain to me why because inequalities confuse me sometimes 1. Julia is allowed to watch no more then 5 hours of tv a week. She has already watched 1.5 hours. Write and solve an inequality to show how

11. Pre Calculus

For a vector $\bold{v}$, let $\bold{r}$ be the reflection of $\bold{v}$ over the line $\bold{x} = t \begin{pmatrix} 2 \\ -1 \end{pmatrix}.$ [asy] unitsize(1 cm); pair O, V, R; O = (0,0); V = (3,1); R = reflect(O,(2,-1))*(V); xaxis(-2,4); yaxis(-3,1);

12. Social studies help quick

Why do United States citizens have civic responsibilities? A in a republic the president can order any citizen to help. B in a democracy every citizen must earn their rights C in a democracy the country is run by all citizens working together. D in a

1. What do colonialism and imperialism both require? a) one country giving money to another b) two countries sharing c) two countries working together d) one country ruling another country**** 2.What did West Africans trade to North Africans in exchange

14. ss plz help

In the story of the Shining Princess where did the princess Maholia live? In a kraal with her mother the queen in a thatched hut with her father the chief in a poor village in the countryside In a beautiful tower, made of marble. I think its D can you say

15. Physics

A 0.60-kg block initially at rest on a frictionless, horizontal surface is acted upon by a force of 9.0 N for a distance of 2.0 m. How much farther would the force have to act for the block to have 72 J of kinetic energy?

16. Tech

The best definition of an idiom is ___________________.

40. math

sally and hans started counting at the same time. sally counted on by tens from 300. hans counted back by hundreds. after six counts they had reached the same number. what number did hans start counting from?

41. English

Is this sentence complex compound or simple? The question is, when water evaporates from the sea it becomes fresh water

42. CHEMISTRY

SUppose that not all of the NaCl dissolved in the water in step 7, EXPLAIN this error would affect your reported percent of: NH4Cl NaCl SiO2

43. History

Which of the following lists the start of the agricultural revolution according to absolute chronology? A. AD 500 B. after hunting and gathering C. post-Spanish exploration D. 5000 BC****

44. Chemistry

9.3mL of ammonia base cleaner requires 12mL of 1M HCL to reach end point. A) what is molarity of ammonia and b) what is percentage of ammonia

45. Introduction to Graphic Design

Hello! Thanks for checking my question out! ____ Image URL: h t t p : / / p r n t s c r . c o m / g n n u 6 5 Use the image to answer the question. 2. Under which of the following categories does the artwork fall? (1 point) a) abstract painting b) portrait

47. Physical Science

Hello! Thanks for checking my question out! ____ 2. Milk is an example of a (1 point) a) solution. b) homogenous mixture. c) colloid. d) compound. My Answer: C Could someone please check if I'm right? Thanks! - Da Fash

48. Math

If you can mow 2/3 of the lawn in 3/4 hour, how much lawn can you mow in 1 hr?

49. math

what is an alegbraic expression for the followin word phrase: "6 times the difference of b and p"?

50. Math

Nine wonderful students decided to buy their math teacher an expensive present, each contributing the same amount of money. Four other students found out about the plan and joined in, agreeing to pay their share of the present's cost. This resulted in a

51. Time Velocity and Distance graphs

Good morning, Quick question I have a question on simple motion. Ive been given a table of values from which I constructed Velocity v Time graph which is roughly the shape of a trapezium. From this I worked out the total distance covered. Now I want to

52. Algebra

160 kg of an alloy of copper and aluminium contains 55 percent of aluminium. How much aluminium must be melted into it to make the alloy contain 70 percent of alluminium

53. Pre Calculus

Find the 2 x 2 matrix A such that pmatrix{(-1,-1)(1 -1)} A = I, where I is the 2 x 2 identity matrix.

54. PreCalculus

Let f(x) = x^2 +3x - 1 and g(x) = x^3 +4x^2 +1. Find (f-g)(x) a. (f-g)(x)=-x^3 - 3x^2 +3x b. (f-g)(x)=x^3 - 3x^2 +3x - 2 c. (f-g)(x)=--x^3 - 3x^2 +3x - 2 d. (f-g)(x)=-x^3 - 7x^2 +3x - 2

55. English

1. She seems to be nice. 2. She seems nice. 3. She seems to be a nice person. 4. She seems a nice person. 5. The parcel seems to be a gift for out children. 6. The parcel seems a gift for out children. 7. What seems to be the trouble? 8. What seems the

56. statistics

If we wish to have a 90% confidence interval, what would be the value of α/2? Show how you arrived at this answer.

57. Psychology

Would this be an example of top-down processing? I am at home, and I have left a room where a family member is sitting. I come back to this room awhile later and start having a conversation because I expect the family member to still be there because I did

58. Algebra

The measure of one of the small angles of a right triangle is 26 more than 3 times the measure of the other small angle. Find the measure of both angles.

59. Algebra

A small jet can fly 795 miles in 3 hours with a tailwind but only 645 miles in 3 hours into a headwind. Find the speed of the jet in still air.

60. math

"Relative frequency" is the same as which of the following? frequency histogram cumulative frequency distribution proportion I think its proportion, am I right?

61. Math

4 foot sandwich between two people one ate 2/9 of it and the otherone ate 1/6 of it. So at this point they ate so far ? How much is left?

62. English

1. I called him, but he did not hear me. 2. And a month ago, I needed him and I called him. ------------------------------------------ Does 'I called him' mean 'I made a telephone call to him' or not? Or does it mean the following? "to utter in a loud

63. English

1. I walked to school, feeling embarrassed. 2. I walked to school, and I felt embarrassed. 3. I walked to school, and I was feeling embarrassed. 4. I walked to school, while I felt embarrassed. 5. I walked to school, while I was feeling embarrassed.

64. Psych

Is this an example of top-down processing? I heard a noise that sounded like a door opening and assumed my parent was home. I made this assumption based on the fact that it was the time of day that they would usually come home and that they sent me a text

66. Physics

force 15i -16j N is added to another 23i N. In what direct measured from the positive x-axis does the resultant act?

(9+2)x6-5

68. Physics

Two cars with different motors are competing. One of the cars accelerate från 0-90 km/h on 12 seconds, the other one accelerate from 0-90 km/h on 20 seconds. The acceleration is the same all the time. After 90km/h, the velocity is constant. How many

69. Calculus

I really don't get this question :( What is 2+2? a. 3 b. 7 c. 4 d. -4 I really need help!!!

70. Math

55÷11+7x(2+14)

71. Math

Sam is at the driving range practicing his swing. During Sam’s golf drive, the initial angular velocity of his club is 5 rad/s at the start of the backswing. The constant, average angular acceleration of the club between the start of the backswing and

72. English

What is the difference between 'post' and 'upload'? 1. He posted a message to the bulletin board. 2. He posted some photos to the bulletin board. 3. He uploaded a message to the bulletin board. 4. He uploaded some photos to the bulletin board. 5. He posted

73. Art Help: A Secondary Input Please

Why should creativity be needed in designing products like this car? A) Creativity ensures that products stay consistent over time. B) Creativity only allows the designer to create new paint and color designs. C) Creativity is only used for advertising the

74. algebra

PB is a line segment on a number line. It has endpoints at -2 and 12 what is the coordinate of its midpoint?

75. Physical science

In a recipe for lemonade it gives the ingredients as 1 cup of water,1.5 tablespoons lemon juice, plus sugar and salt.Not taking into account the sugar and salt, what is the concentration of lemon juice in the mixture as a percentage by volume? 16

2.6*1.5

77. Algebra

Divide 105 such that 1/3 of one part is equal to 1/4 of other part

78. Math

Sam is at the driving range practicing his swing. During Sam’s golf drive, the initial angular velocity of his club is 5 rad/s at the start of the backswing. The constant, average angular acceleration of the club between the start of the backswing and

79. English

1. It seems that John is sick. 2. John seems (to be) sick. -------------------- Both are the same. However, do they have any difference in meaning[hidden meaning]?

80. Algebra

(I jut this in word form so someone would understand better but can someone please try helping me solve this. I only need help with this 1 problem.) Evaluate this pricewise function at x=-4 and x=4. f(x)={x^2, if x less than or equal to -4 {x^3, if -4 less

81. Physical Chemistry

What is the mole fraction of alanine in 0.314m CH3CH(NH2)COOH(aq)?

82. Social studies unit 3 lesson 6 8th grade practice

Plz help me anyone know the answers to the 15 questions?

83. English

van Gogh 1.[væn-ɡóu,-ɡɔ́:x] 2.[-ɡɔ́x,-ɡɔ́f] Which one is similar to the sound of Gogh in the Netherland, where Gogh was born?

84. physics

a pendulum swing with a speed of 1.5 m/s at its lowest point. How high will it rise before it stops

85. English

Can someone explain to me what does pre released title essay test mean,i dont get it and in my assessment shows that i have pre released title essay test.Please someone tell me what is it.Thanks

86. Math

96÷16+(25x2)-15-3

87. Algebra

160 kg of alloy contains 55 percent aluminium. How much alluminium should be added to make it 70 percent

22÷2x9

89. Chemistry

A mixture contains 33.5% A, 22.8% B, the remainder being component C. if you have 25.0 g of this mixture, how many grams of each component are there?

90. CHEMISTRY LAB 2

A mixture contains 33.5% A, 22.8% B, the remainder being component C. if you have 25.0 g of this mixture, how many grams of each component are there?

91. math

A painter uses 5 cans of white paint and 3 cans of blue paint. What does the ratio of 3:8 mean?

92. math

A bag has 40 marbles. There are 25 red marbles. The other marbles are black. What is the ratio of black marbles to red marbles in the lowest form?