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# What is x in 7x-2=5x+8 (answer)

An equation (math expression with an equal (=) sign) is like a seesaw or teeter-totter:  both need to remain balanced to work correctly.  If you adjust or change the weight on one side of a seesaw, then you have to also adjust or change weight on the opposite side until it is balanced again....

A common way to remember the order of operations is the abbreviation "PEMDAS", which is turned into the phrase "Please Excuse My Dear Aunt Sally".  It stands for "Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction". Assuming you intended 6 divided by 2*(1+2):  6/2(1+2)...

See answers under the same problem you entered as "math help please"

Let's state what we know:  both fat-content chocolates added together will be 200 kg Let's let x = the 20% fat-content chocolate, and y = the 40% fat-content chocolate (but we could use any 2 letters or symbols) So we know that x + y = 200 Let's state the percentages as decimals:  20%...

# ABC has vertices A(0, 6), B(4, 6), and C(1, 3). Find the slope, then the orthocenter of ABC. List your steps. (answer)

Hi Mara!  The orthocenter is where three lines cross:  these lines come from each triangle vertex (corner) and go through the triangle and make a perdendicular (at a right angle) intersect with the side opposite the angle each came from.  In this case, since this is an acute triangle, they all...

# How do I create a probability model? (answer)

You don't state if you put the card back into the deck after each attampt or not, and if there are Jokers in the deck or not (or only 52 cards of 13 in each of 4 suits). If yes (cards are reinserted into the deck and it's a standard deck of 52 with no jokers), then you have a 1/4 chance of winning...

# Can you help me? (answer)

For the first, divide 2x3 - 5x2 -28x + 15 by (x - 5).  You should get 2x2 + 5x - 3.  Now you can factor that:  look for combinations of 1, 2, and 3 that can add to 5 (for 5x) and multiply to get -3.  Let's try (2x - 1) and (x + 3), since (-1)(+3) = -3 and (2x)(+3) + (x)(-1) = +6x - x...

# I need help on Simple Interest. (answer)

What you are missing is a simple formula:  I=PRT.  Means Interest (in dollars, not %) = Principal (downpayment or original savings) X Rate (percentage rate as a decimal:  5% = 0.05) X Time (in years - convert months into decimal part of 1 year).  You can also change that formula around.  For...

# How do you find a line parallel to y=2x+3 (answer)

The pattern of this equation may look familiar to you... remember y=mx+b?  Called the slope-intercept form, because the cooefficient (multiplier) for x, represented by the letter m, is the "slope", or tilt, of the line on an x-y graph.  The b represents where the equation line intercepts (crosses)...

# kathy showed her work on a homework problem2(3 x + 0) - 4x= 662(3 x) - 4X = 666x - 4x = 662x - 66x = 33which property was used in solving this equation (answer)

Distributive (when you multiplied 2(3x + 0)).  2 gets "distributed" across both 3x and 0.

I'm making a few assumptions here:   1.  Your problem is Inverse Sine of 1.325 radians (not degrees) 2.  By Inverse Sine you also mean Sine-1 or ArcSin A trig (Trigonometry) table gives ArcSin(1.325 radians) = 14.07°, or x = 0.970

# what is a straight edge (answer)

It looks like you may have answered your own question. In practical, useful every-day terms, a straight edge is anything with a hard, stright-line edge, which we normally use to mark or cut a straignt line in some material (wood, cloth, etc.).  An example is the edge of any normal school measuring...

# which of the following graphs shows the graph of this equation? (answer)

Without seeing any of your graph choices, no way to directly answer :-)  But we do know some things:  because there are no exponents (x2 or x3, etc.), we already know that this is a "linear equation".  Linear means straight line, and the graph is a straight line.  Solve for y:   y+1 = 2(x-1)...

# what is the common denominator of 3 over 5 (answer)

"Common" means something that applies to two or more of the same or similar things.  In this case, "common demoninator" means one denominator (bottom part of a fraction, or the divisor) that can be used by two or more fractions with denominators.  In your example, you only have ONE fraction and...

# Will you help me Algebra word problem? (answer)

And looking at it using only one variable: Let's say Brianna has x dollars.  Then Julia has (1/3)(x), or x/3 dollars (1/3 as many x as Brianna). Joseph has 12 less than Julia, or (x/3)-(12) dollars.  All three together have \$113 dollars, so... x + x/3 + (x/3)-12 = 113   Get x's alone...

# Describe the properties of the diagonals of a parallelogram. (answer)

Adding more information about the diagonals in a Parallelogram: In a parallelogram, diagonally-opposite angles are equal.  Diagonals drawn which divide these agles into two angles in each corner create opposite equal angles:  the inside corner angles made between a diagonal and any one side...

# sir, i want to know what is the formula of ratio and proportion? (answer)

Ratio and proportion are slightly different viewpoints of the same idea:  using what you know to quantify what you don't yet know.  It's like having a replica model of the house you want ot build:  if the length of your model house is 2 feet and the width is 1 foot, then you can know that your...

# If n is any number, is the statement 2n + 1 always true? If so, why? (answer)

If n is + or - infinity, then it is undefined (has no meaning), and therefore any expression using n would also be undefined.  If n = √-1 then it is an imaginary (also undefined) number, and n would equal i, so 2n+1 = 2i+1. Otherwise, any 2n+1 should be a valid and real value.

# -6 < n/9 -5 = Solve each inequality and graph it's solution. (answer)

Without parentheses and brackets to isolate each term, I'm not sure I correctly read your question.  I think your problem is (-6) < [(n/9)-5].  If yes, then here's how I would solve it: Treat the inequality sign ( < ) just as you would an equal ( = ) sign. Get the term with n by itself...