# Posts by eva

Total # Posts: 215

**Matrix, math**

A = 2 x 2 -1 0 0 -1 find n that A^n * B = C B = 2 x 1 0 1 C = 2 x 1 1 0 answer is 6, but I don't know why find A^2014 the answer is 0 1 -1 0 but I don't know why

**Matrix, math**

I have matrix A = -1 0 0 -1 B = 0 1 c = 1 0 find n that A^n * matrix B = C find A^2014

**Social studies**

Idk

**Social studies**

The spreading information to convince others or an idea

**Math**

The yearbook club is having a bake sale to raise money for the senior class. Large cupcakes are sold for $1.25 each and small cupcakes are sold for $0.75 each. If 105 cupcakes were sold for a total amount of $109.75, how many large cupcakes did the yearbook club sell? A) 43 B...

**Maths **

Only using 2357,what number is a three digit number that add by a four digit number and equals to a five digit number? You can only use zero on the last digit of the four digit number.

**Math**

2 7/8

**Economics**

i found #1 and #3, but i cant find number 2

**Business**

If you’re a Canadian exporter would you like to see a higher Canadian dollar or a lower Canadian dollar in relation to the US Dollar? Explain using an example. I would like to see what perspectives different people have

**Math**

How is combing radicals by addition and subtraction similar to combining monomial expressions by addition and subtraction? Please use examples.

**Help on Social Studies please!**

Thanks, Ms. Sue. Got 8/8!

**Help on Social Studies please!**

Part A: What is the basic independent unit of world politics? a. country b. province c. nation *** d. organization Part B: Which of the following groups is an example of the basic unit you selected in the previous question? a. people who share a common language b. people who ...

**Chemistry**

Predict the effect of each of the following by mass of water in the hydrate and the chemical of the hydrate? a) not heating the hydrate enough b) overheating the hydrate and producing some copper (ii) oxide C) the initial hydrate appears to weigh less than it actually did, but...

**Factor Riddles**

97?

**Economics**

analyze what happens to the market for cheeseburgers if the price of cheese rises (cheese being apart of the cost for a cheeseburger) . Be specific and explain what happens ( or is not affected) for each of the following: 1. the supply curve 2. the quantity supplied 3.the ...

**Chemistry**

When 0.07 moles of ammonium sulfate ((NH4)2SO4) are dissolved in enough water to make 254 milliliters of solution, how many ammonium ions are present?

**Chemistry**

A chemist dissolves 0.096 g of CuSO4 · 5 H2O in water and dilutes the solution to the mark in a 500-mL volumetric flask. A 10.8-mL sample of this solution is then transferred to a second 500-mL volumetric flask and diluted. What is the molarity of CuSO4 in the second ...

**Chemistry**

A chemist dissolves 0.096 g of CuSO4 · 5 H2O in water and dilutes the solution to the mark in a 500-mL volumetric flask. A 10.8-mL sample of this solution is then transferred to a second 500-mL volumetric flask and diluted. What is the molarity of CuSO4 in the second ...

**biology assignment**

Evapotranspiration

**Spanish**

fill in the missing letters in this sentence. Quizas anado una ---h---d-de--o picado tambien.

**Maths lit,business studies,consumer studies,tourism**

I chose this subjects Maths literacy,Consumer studies,business studies,tourism but i wanna know what can i do with does subjects after finishing school and i wanna become a 'Chef' are these subjects right or wrong for my subjects???

**physics**

A friend in another city tells you that she has two organ pipes of different lengths, one open at both ends, the other open at one end only. In addition, she has determined that the beat frequency caused by the second-lowest frequency of each pipe is equal to the beat ...

**Math**

-9(-5x+2)= -4(3x+2) I keep getting x=.30 but I know it's wrong!

**math**

Find period and phase shift and amplitude of y=10sin(x/4)-4pi)-5? The amplitude =10 Period=? Phase shift=?

**Math**

Solve -2x<9. x> ____

**Zoneton**

Solve: -2x<9. x>____

**Life Orientation**

The community members ,firstly got a permit to protest from Malamulele police station

**life orintation**

To be independent

**health**

potassium

**critical thinking**

thanks Ms Sue.

**critical thinking**

I reread and my answer is d.

**critical thinking**

Which of the following is an example of an indefinite pronoun? A. This B. You C. Which D. Each my answer is a.

**reading and writing**

Which of the following is a common error in composing a thesis statement? A. Your thesis statement is specific as opposed to general. B. You offer an original perspective on a familiar theme. C. You focus your thesis statement after you begin writing. D. Your thesis statement ...

**reading and writing**

Please read the following excerpt from an essay. The sentences are numbered to help you respond to the question that follows. (1) After Sean was arrested for breaking into a pawnshop, I began to wonder. (2) Why did some kids from my neighborhood end up in trouble while most of...

**physics**

A block (mass m) hangs from a spring (spring constant k). The block is released from rest a distance d above its equilibrium position. (a) What is the speed of the block as it passes through the equilibrium point? (Use any variable or symbol stated above along with the ...

**learning skills**

A natural way to reinforce science process skills and introduces the scientific method. This strategy, especially appropriate for primary grades, is to have children do which of the following? A. Begin a collection B. Manipulate objects C. Observe D. Go on field trips my ...

**learning skills**

According to the text, why should teachers of young children share science activities with parents? A. Everybody should know the facts of science. B. Parents want to learn science. C. Science relates to all aspects of a child's life. D. Parents are their children's ...

**Pre-calc/trig**

The answer is only : A pendulum swinging back and forth. It cannot be the other options because when looking for a period behavior, we are also looking for something to come back to the initial starting point. Can't be the ball because logically it would eventually come to...

**Physics**

UPDATE: On 4, I tried using Δx=rΔӨ. It cleared up a lot of data issues.

**Physics**

In class, we've been working on moment of inertia and recently did a lab regarding its usage. I don't feel too confident with the material yet and was hoping someone could look over my work and offer advice on what to do. We used solid spheres in the lab (2/5mr^2 used...

**physics**

You work at a garden store for the summer. You lift a bag of fertilizer with a force of 122 N, and it moves upward with an acceleration of 0.760 m/s2.

**physics**

A 2011 kg elevator moves with an upward acceleration of 1.9 m/s2. What is the tension in the cable that supports the elevator?

**Physics**

A rope is attached from a truck to a 1403 kg car. The rope will break if the tension is greater than 2375 N. Neglecting friction, what is the maximum possible acceleration of the truck if the rope does not break? m/s2 If the truck can reach 30 mph within 7.5 s, should the ...

**COMBINED OPERATION ON FRACTIONS**

J MADE 3 OVER 5 OF JOURNEY 3 OVER 4 OF REMEINDER BY TRAIN N WALKED REST.DISTANCE WALKED 3 KM.HOW LONG WAS THE JOURNEY

**Physics I**

I'm not sure how to address any of these. I"ve attempted them but each time I do, I've gotten different answers. I'm not even sure where to begin. 1. The Duke’s efforts to conquer the Count are starting to really falter. He has been forced back away from ...

**Precalculus**

The revenue and cost equations for a product are R = x(50 - 0.0002x) and C = 12x + 150,000 where R and C are measured in dollars and x represents the number of units sold. How many units must be sold to obtain a profit of at least $1,650,000? What is the price per unit?

**Precalculus**

The revenue and cost equation for a product are R = x(75 - 0.0005x) and C = 30x + 250,000 where R and C are measured in dollars and x represents the number of units sold. How many units must be sold to obtain a profit of at least $750,000? What is the price per unit?

**Precalculus**

A rectangle is to be constructed so that it is bounded by the x-axis, the y-axis, and the line y = -3x + 4. What is the maximum area of this rectangle?

**Precalculus**

A farmer has 1000 feet of fencing materials available to fence a rectangular pasture next to a river. If the side along the river does not need to be fenced, what dimensions maximize the enclosed area? What is the maximum enclosed area?

**math**

So can this question only be answered because we have the 4 multiple choice answers and we can test for each? Or is there a way to figure it out without having the answer?

**math**

the sides of a quadrilateral are in the ratio 1:3:5:7. if the perimeter of the quadrilateral is 64cm,what is the length of the second longest side/

**7th grade math**

11=3x-10 21=3x 7=x Ross scored 7 points?

**math**

If evies chicken lays 4 eggs in 5 days how many days will it take for evies chicken to 16 eggs?

**math**

If evies chicken lays 4 eggs every 5 days, how many days will it take for evies chicken to lay 16 eggs?

**Geometry**

Did I solve the following correctly? I had to the fin the midpoint. A (-3, 2) B (5, -4) I did the midpoint formula: M(-3+5/2, 2+ -4/2=M (2/2, -2/2). Is (2/2, -2/2) the correct midpoint?

**Literature**

Thank you so much! :)

**Literature**

The narrator is Scout. OH! Okay, so we learn about the characters through Scout's eyes and her points of view of them. Is that close to being correct?

**Literature**

American literature homework question: To Kill a Mockingbird? Can someone help me understand the following question, please?: Of all the ways an author has of telling us about a character, how do we learn about the characters in To Kill a Mockingbird? -I want to say it's ...

**Teaching in Early childhood progras**

Self appraisals should not be used to assess which of the following? A. Math concepts B. Dispositions regarding tasks C. IEP adherence D. Literacy my answer is c.

**Teaching in Early childhood progras**

are you sure

**Teaching in Early childhood progras**

1)When children rely on outside controls to guide their actions, they're operating at the _______ level of self-regulation. A. adherence B. amoral C. internalization D. identification 2)Which statement most accurately describes the Developmentally Appropriate Practices ...

**Teaching in Early childhood progras**

Why should teachers offer a variety of small-group activities for children every day? I. The children will be at different developmental levels. II. The children will be coming from different cultural backgrounds. III. Different children will be interested in different ...

**Teaching in Early childhood progras**

thanks

**Teaching in Early childhood progras**

_______ are helpful in assessing a variety of children's skills, including both cognitive abilities and motor skills. A. Art projects B. Smiley-face teacher evaluations C. Standardized tests D. Student-led conferences my answer is a.

**Teaching in Early Childhood Programs,**

thanks

**Teaching in Early Childhood Programs,**

Which of the following is least characteristic of internalization? A. It occurs at different times for different issues. B. It involves behaviors and attitudes that become basic parts of each child's personality. C. It involves some measure of self-condemnation. D. It ...

**math**

x square plus 12X plus 4 equals 0 what is the value of x

**Geometry**

Kevin has a salt water aquarium.As Shown below in the shape of a rectangular prism. ( base 36 in, width 18in,height 20 in) . When a rock is submerged into the aquarium the water level rises 0.25 inches. What is the voulume of the rock ?

**science**

When 4.56 g of a nonelectrolyte solute is dissolved in water to make 275 mL of solution at 22 °C, the solution exerts an osmotic pressure of 873 torr.

**Algebra**

Decide whether the given relation is a function of x. (NO CREDIT WILL BE GIVEN WITHOUT AN EXPLANATION). Give the domain. y=-7/x-16

**Algebra**

i try this one but graphmatica gives me different graph. Please help. Solve for y in terms of x and replace y with the function notation f(x). -2x + 5y = 9

**Math Algebra**

is this correct guys? F=k•g²•h 50=k(4) ² • 2 50=k•32 K= 50/32 divided by 2 K= 25/16 F= 25/16• (3) ² 6 F= 25/16 • 54/1 F= 1350/16 F= 84.375

**Math Algebra**

f varies jointly as g2 and h, and f = 50 when g = 4 and h = 2. Find when g = 3 and h = 6

**Essay**

I have the same problem ! And my intro's too long... I have a limit of only 700 words! I'm at 400 just with the intro and first body paragraph ! Please help...

**Algebra**

It is hard when you are taking online classes and professor doesn't explain anything. Thank you guys

**Algebra**

Let g(x) = -x2 + 4x + 1. Find g(k)

**Algebra**

Here is the question : Determine whether the equation represents direct, inverse, joint, or combined variation. y=2x^3

**Math**

Determine whether the equation represents direct, inverse, joint, or combined variation. y = 2x on 3rd

**physics (science)**

John walks 1.0 km north, turns and walks 1.2 km at 50 degrees north of due east, and then turns and walks .8 km at 25 degrees north of east. what is the resultant distance and direction he has flown

**statistics**

91

**math(Ms.Sue)**

6&1/2 gallons

**geometry**

WHAT IS ad TO THE NEAREST 10 ON A KITE WHEN THE KITE IS22,7, AND 12

**math**

simplify the expression 4/(x+2)-3/(x+2)

**law**

A crime scene investigator has located a witness at a crime scene, but he/she is uncooperative. The investigator strongly believes that this witness is fearful of something and is uncooperative. Describe the handling of witnesses and evidence. What would you as the ...

**Algebra**

I got 20 students... 7 students take math and band...9 take choir and math...and 4 take band and choir

**Trigonometry**

Why

**math**

im a little confused i still dont know how you got that can you walk me through it please

**statistics**

90% confidence; the sample size is 1150 of which 40% are successes.

**biology**

what would happen if an excess of mg(oh)2 is used

**physics**

A pelican ﬂying along a horizontal path drops a ﬁsh from a height of 3.3 m. The ﬁsh travels 8.7 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s

**Math**

The length of a rectangle is 1 more than the side of a square and the width of the rectangle is 1 less than the side of the square. of the area of the rectangle 35, find the length of the side of the square.

**Physics**

In the reaction U gives Th + He 6.88*10-13 J energy are released as the kinetic energies of the products. If the ratios of the masses Th to He is 234:4 find the kinetic energy of the alpha particle

**physics**

In the reaction U gives Th + He 6.88*10-13 J energy are released as the kinetic energies of the products. If the ratios of the masses Th to He is 2.4:4 find the kinetic energy of the alpha particle

**Physics**

A 5.7- kg concrete block rests on a level table. A 4.0- kg mass is attached to the block by a string passing over a light, frictionless pulley. If the acceleration of the block is measured to be 1.0 m/s2, what is the coefficient of friction between the block and the table?

**English**

What was the Clinton Healthcare plan in the early 1990's? Know of any links or info that I can read up about it? Thanks!

**geometry**

obtuse because the angle is more than 90 degrees

**english**

correct these sentence. i had to rewrite them into reported speech . are they okay? 1-why are you decorating the house? she asked me why i was decorating the house. 2-what style do you like? she asked me what style did i liked. 3-do you always get what you want? she asked me ...

**Language**

a)stitch b)sketch C)Blotch D)crutch e)scratch F)stretch