This is hey confusing because I didn't go to school when they gave a lesson about this so please help.

Mathematics

1 answer:

alex41 [277]3 years ago

8 0

I think that this is just showing how you can make different percentages by multiplying/dividing by specific numbers.

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I need a bit of help on this

Alona [7]

He'll save 3 dollars if he buys 60 mouth guards in packs of 10 which is 6×14.50 = 87
Whereas
4×22.50 = 90

8 0

3 years ago

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Simplify the expression below.

olasank [31]

$\bf \left.\qquad \qquad \right.\textit{negative exponents}\\\\
a^{-{ n}} \implies \cfrac{1}{a^{ n}}
\qquad \qquad
\cfrac{1}{a^{ n}}\implies a^{-{ n}}
\qquad \qquad 
a^{{{ n}}}\implies \cfrac{1}{a^{-{{ n}}}}
\\\\
-------------------------------\\\\$

$\bf \cfrac{14a^8y^3-7a^4y^5+28a^{12}y^2}{7a^4y}\impliedby 
\begin{array}{llll}
\textit{let us first, distribute}\\
the~denominator
\end{array}
\\\\\\
\cfrac{14a^8y^3}{7a^4y}-\cfrac{7a^4y^5}{7a^4y}+\cfrac{28a^{12}y^2}{7a^4y}
\\\\\\
\cfrac{14}{7}a^8a^{-4}y^{-1} y^3-\cfrac{7}{7}a^4a^{-4}y^{-1} y^5+\cfrac{28}{7}a^{12}a^{-4}y^{-1} y^2
\\\\\\
2a^{8-4}y^{-1+3}-1a^{4-4}y^{-1+5}+4a^{12-4}y^{-1+2}
\\\\\\
2a^4y^2-1\cdot 1y^4+4a^8y\implies 2a^4y^2-y^4+4a^8y$

4 0

3 years ago

Which scale of measurement is being used if assigning numbers based on different professional affiliation (e.g., counselors, soc

hammer [34]

Answer: The answer is Nominal scale

Step-by-step explanation:

<em>Scale of Measurement</em> refer to ways in which variables/numbers/information are categorized

<em>Nominal Scale</em> is a measurement scale, in which numbers serve as “tags”, to identify or classify an object. it is usually use for non-quantitative variables. Some examples of variables that use nominal scales are language spoken, sex, the football club you support, profession etc

8 0

4 years ago

of the 20 basketball games so far this year,tracy has attended 14.what percent of basketball games has tracy attended

Monica [59]

Answer: Tracey attended 70% of the basketball games.

Step-by-step explanation:

<h3>you would multiply 14 by 100</h3><h3>then you would multiply 20 by x</h3><h3>that equals 1400=20x</h3><h3>then you divide both sides of the equal sign by 20</h3><h3>and get 70%</h3>

8 0

3 years ago

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Express answer in exact form. Show all work for full credit.

Mandarinka [93]

Our aim is to calculate the Radius so that to use the formula related to the area of a segment of a circle, that is: Aire of segment = Ф.R²/2

Let o be the center of the circle, AB the chord of 8 in subtending the arc f120°

Let OH be the altitude of triangle AOB. We know that a chord perpendicular to a radius bisects the chord in the middle. Hence AH = HB = 4 in

The triangle HOB is a semi equilateral triangle, so OH (facing 30°)=1/2 R. Now Pythagoras: OB² = OH² + 4²==> R² = (R/2)² + 16
R² = R²/4 +16. Solve for R ==> R =8/√3

OB² = OH² +

6 0

4 years ago

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