12/11/20

Which equation represents a line that is perpendicular to the line represented by 4x - 2y = 7 ?
1. 2x + y = 42. -4y + 2x = 33. -6y = 3x - 244. x + y = -1
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12/11/20

I dont know how to work this problem out.
write an equation of the line that passes through (7,10) and is perpendicular to the line y=1/2x-9
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12/11/20

if y varies directly as x and y= 3 when x = 10, find x when y=8
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12/11/20

What is the slope-intercept form of the equation 4x-2y=9
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12/11/20

Fill in the blanks below with the correct coefficient for each term.

Simplify: (x2+5x+8)−(3x2+2x−6)f(x)−g(x)=___
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12/11/20

The length of a rectangle is 8 cm more than 3 times its width. The perimeter of the rectangle is 64 cm. What is the area of the rectangle? Show your work.
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12/11/20

) Calculate the number of handbags that must be sold for the company to make an annual profit of £80,000.

Elite Accessories Ltd. is planning to sell 4,000 handbags next year at a selling price of £85.  To make each handbag, the company uses 0.6m2 of leather at a cost of £40 per m2, two hours of direct... more
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12/10/20

One number is three less than a second number. Twice the first is 9 more than 3 times the second. Find the values of the first and second number

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12/10/20

Fundamentals of Chemistry
You found the mass of an irregularly shaped metal piece to be 14.0g. You filled the graduated cylinder to 60.0ml with water then submerged the metal. The graduated cylinder then read 89.2ml What... more
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12/10/20

Chapter 9 Review
Magnesium hydroxide, Mg(OH)2, is often present in antacids to neutralize stomach acid, HCl. Each antacid tablet contains 0.675 g of magnesium hydroxide. How many grams of HCl get neutralized by... more
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12/10/20

write the equation of the line in slope- intercept form
1.) x-intercept = -4, y-intercept = 1 2.) x-intercept = 5, y-intercept = -2
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12/10/20

Write the equation of the line that passes through the points (0,2) and (-4,5)
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12/10/20

The perimeter of a triangle is 82 centimeters. If two sides equally long and the third side is 10 centimeters longer than the others, find the lengths of the three sides.
We also have to find if it is centimeters or square centimeters.
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12/10/20

function questions
Write a function that could be used to add 4 consecutive odd numbers totalling a specific amount and then find the four numbers that total 216.
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12/10/20

Function questions
Billy’s grandfather gave him $1,200 when he turned 16 towards buying a new car that he wanted, which cost $25,000. He saved $500 a month from his job as a computer programmer. Write a function you... more
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12/10/20

function questions
Write a function that could be used to calculate the altitude of a plane arriving at JFK International airport which was cruising at an altitude of 30,000 before it began its descent at a rateof... more
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12/10/20

Chemistry Question

What volume of 0.150 M HCl is required to neutralize 100 mL 0.050 M KOH? A. 0.75 mL B. 0.033 mL C. 300 mL D. 33 mL
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12/10/20

Stoichiometry; Given the balanced chemical equation: 4Al+3O2=2Al2O3
Indicate the following: Atomic level interpretation Mole level interpretation Gram level interpretation In the lab, a student is given 3.5 moles of Al, how many moles of oxygen are needed to react... more
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12/10/20

Hfus for water = 334 J/g. If you have 27.0 grams of ice, the amount of heat in J needed to change the ice into water is _________ J.
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12/09/20

Write System of Equations from context
Brianna went into a bakery and bought 2 cookies and 3 brownies, costing a total of $9.50. Nevaeh went into the same bakery and bought 10 cookies and 6 brownies, costing a total of $20.50. Write a... more
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12/09/20

Which one is correct? I have two different answers to the question: Is the number of particles per mole dependent on the kind of atom/element? Why or why not?
No, because the number of particles per mole is measured by the Avogadro Number. This means that one mole of any substance is equal to 6.022 × 10²³. Although the number of particles per mole is not... more
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12/09/20

Chemistry mole question
Suppose 0.83lb of sodium dichromate is dissolved in a bucket containing 3567mL of water.a) What is the resulting concentration (in mol/L) of the sodium dichromate solution? b) How many moles of... more
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12/09/20

Chemistry mole question
freon-12 (cf2cl2) is commonly used as the refrigerant in central home air conditioners. Calculate, at STP, the volume of freon-12 of a sample containing 5.82 x 10^13 atoms
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12/09/20

Chemistry Question
How much nitrogen is contained in 350.0 g of NH3?
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12/09/20

It is a fairly long word problem.
A 480-pound alloy containing 30% silver was mixed with an alloy containing 55% silver to get an alloy containing 40% silver. how many pounds of the 55% alloy were used?
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