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3 years ago

I need understand math

1 answer:

3 0

<span>mathematics definition. The study of numbers, equations, functions, and geometric shapes (see geometry) and their relationships. Some branches of mathematics are characterized by use of strict proofs based on axioms. Some of its major subdivisions are arithmetic, algebra, geometry, and calculus.

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20 POINTS FOR ONE SIMPLE QUESTION PLEASE HELP

Sergio [31]

Yeah you did it right but good job!

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3 years ago

Situation: Florentina the Baker has already prepared 4 kilograms of dough. She

insens350 [35]

Answer: 4 kilograms of dough and will continue preparing 1 kilogram of dough every hour.

Step-by-step explanation:

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4 years ago

Find the value of r so the line that passes through (-5,2) and (3,r) has a slope of -1/2

soldier1979 [14.2K]

The value of r so the line that passes through (-5,2) and (3,r) has a slope of -1/2 is -2

<u>Solution:</u>

Given that line is passing through point (-5, 2) and (3, r)

Slope of the line is $\frac{-1}{2}$

Need to determine value of r.

Slope of a line passing through point $\left(x_{1}, y_{1}\right) \text { and }\left(x_{2}, y_{2}\right)$ is given by following formula:

$\text { Slope } m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$ --- eqn 1

$\text { In our case } x_{1}=-5, y_{1}=2, x_{2}=3, y_{2}=\mathrm{r} \text { and } m=-\frac{1}{2}$

On substituting the given value in (1) we get

$\begin{array}{l}{-\frac{1}{2}=\frac{r-2}{3-(-5)}} \\\\ {\text { Solving the above expression to get value of } r} \\\\ {=>-\frac{1}{2}=\frac{r-2}{3+5}} \\\\ {=>-8=\frac{r-2}{3+5}} \\\\ {=>-8=2(r-2)} \\\\ {=>-8=2 r-4} \\\\ {=>2 r=-8+4} \\\\ {=>2 r=-4} \\\\ {=>r=\frac{-4}{2}=-2}\end{array}$

Hence the value of "r" is -2

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4 years ago

Me box plots below compare the heights or the gins and the boys the seventh grade at Helzor

ludmilkaskok [199]

Step-by-step explanation:

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6 0

3 years ago

What is the simplified form of the expression the quantity x squared minus 4x minus 21 end quantity divided by 4 times the quant

ExtremeBDS [4]

The simplified form of the given expression $\frac{x^2-4x-21}{4(x+3)}$ is $\frac{x-7}{4}$ .

<h3>How to simplify a fractional expression?</h3>

The steps to simplify a fractional expression are:

Factorize the expressions both in the numerator and the denominator using different methods
Remove the common terms in the numerator and denominator
Thus, the simplified expression will be obtained.

<h3>Calculation:</h3>

The given expression is $\frac{x^2-4x-21}{4(x+3)}$

Factorizing the numerator:

x² - 4x - 21 = x² - 7x + 3x - 21

= x(x - 7) + 3(x - 7)

= (x - 7)(x + 3)

Then,

$\frac{x^2-4x-21}{4(x+3)}$ = $\frac{(x-7)(x+3)}{4(x+3)}$

common factor (x + 3) is canceled out from both the numerator and the denominator

So,

$\frac{x^2-4x-21}{4(x+3)}$ = $\frac{x-7}{4}$

Therefore, the simplified expression is $\frac{x-7}{4}$ .

Learn more about simplifying an expression here:

brainly.com/question/13742517

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8 0

2 years ago