MATHEMATICS HIGH SCHOOL

Could someone help me with number 3?

Answers

Answer 1

Answer:

Answer:X=40

Step-by-step explanation:

3inx+2in(4)=in(128)

Step 1: Add -8in to both sides.

3inx+8in+−8in=128in+−8in

3inx=120in

Step 2: Divide both sides by 3

then you will get your answer

Answer 2

Answer:

solve for x by simplifying both side of the equation the isolating the variable.

x = 8/3 + 128/3in

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Explain how to find the simplest form of 100/1000
What error did she make? She simplified the denominator incorrectly. The denominator simplifies to –7. She labeled the points incorrectly. The point (–7, 4) should be (x1, y1). She used an incorrect formula. The formula should be the change in y-values with respect to the change in the x-values. She used an incorrect formula. The formula should be the sum of the x-values with respect to the sum of the y-values.
1/2(x-4)=4. Solve for x
Verify: (sinx+cosx)^2=1+sin(2x)

What adds to get negative seven and multiplies to get five

Answers

I have a pair of numbers for you that will do the job.
They're both irrational, so I can't write their exact value.
Here they are, rounded to the nearest thousandth:

- 6.193
and
- 0.807

Perform the operations
( 8x^2 y^5) (3x y^4)

Answers

$( 8x^2 y^5) (3x y^4)=8x^2 y^5\cdot3x y^4=24x^3y^9$

$(8x^2y^5)(3xy^4)$

$24x^3y^9$

The price of an item yesterday was 110. Today the price fell to 33 find the percentage decrease

Answers

The amount of the decrease is (110 - 33) = 77

The decrease as a fraction of the original amount is ( 77 / 110 ) .

As a decimal, 77/110 = 0.7 .

To change a decimal to a percent, move
the decimal point two places that way ==> .

0.7 ==> 70% .

110-100%
33-x
X=30
100-30=70% is the answer

I am having a hard time with an Algebra question on systems of equations and graphing: y= 5x-8
y= -5x+2

The answer choices are:
A. The solution is ______( fill in whatever the solution is)__.
B. There is infinitely many solutions.
C. There is no solution.
I also have to graph it so what what would I graph if need be?
Thanks so much!!!

Answers

1)First you substitute what we already know y equals
-5x+2=5x-8
2) if you solve that you get that x=1
3) put x back in one of the original equations
y=5(1)-8
4) then you get y as -2

A) the solution is x=1 y=-2

You would graph x and y and a coordinate point (1,-2)

which algebraic expression is a polynomial with a degree of 4? a: 5x4 b: x5 – 6x4 14x3 x2 c :9x4 – x3 – d:2x4 – 6x4

Answers

Answer: the option C. c) 9x⁴– x³– ...

Explanation:

1) A polynomial of one variable is an expression of the kind:

$a_nx^n+a_(n-1)x^(n-1)+a_(n-2)x^(n-2)+...+a_1x+a_0$

2) The order of the polynomial is the highest exponent of the variable, this is n

3) When the expression has one term it is called a monomial, when the expression has two terms it is called a binomial, when the expression has 3 terms it is called a trinomial.

Usually expressions of that kind with two or more terms are referred as polynomial, but one term is referred as monomial.

4) For the given expressions you have:

a) 5x⁴: it is a monomial (one term), which is usually not referred as polynomial properly.

b) x⁵ – 6x⁴ + 14x³ + x²: it is a polynomial with degree 5 (the highest power).

c) 9x⁴– x³– ... : altough the expression is incomplete, assuming that the next terms are monomials with degree less than 4, then this is a polynomial with degree 4, and is the right answer choice.

d) 2x⁴ – 6x⁴: since both terms have the same power, they can be simplified into one term, - 4x⁴, and it is a monomial.

For polynomials having two or more variables, degree can be of a term or of the polynomial. The degree of a term is the sum of the exponents in a specific term while the degree of a polynomial is the highest value of all the degree of a term in the given polynomial. From the choices given, the algebraic expression with a degree of 4 is option C, 9x^4 – x^3.

X varies inversely with y and x = 8 when y = 10, what is the value of y when x=6

Answers

The right answer for the question that is being asked and shown above is that:

x = k (1/y)
k = xy

x1y1 = x2y2
8*10 = 6y2
80 = 6y2
y2 = 40/3

So the answer is 40/3
X varies inversely with y and x = 8 when y = 10, what is the value of y when x=6

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Alon and his friend Marna own a chimney sweep service company. Working together, they can clean a 20-foot chimney in 1 Five-sevenths hours. If it takes Kalon 4 hours to clean a 20-foot chimney by himself, how long does it take Marna to clean the same size chimney by herself?

Tom drives a truck. His regular trip is a distance of 280 km. He drives at an average speed of 80 km/h. For safety reasons Tom’s boss puts a speed limiter on his truck. This reduces Tom’s average speed by 10 km/h. How much longer will it take Tom to drive his regular trip?

How to solve this one

Can someone please help me with this and explain in detail? Thank you so much!