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3 years ago

9

Please answer the ones i have not!

1 answer:

BigorU [14]3 years ago

6 0

Answer:

y = 2/3 (34) + 20 = 34

y = (3 x -2)^2 +17 = 54

y = 2.5 (0.6) + 5.8 = 7.3

Step-by-step explanation:

to make it clear on the solution box you are going to write -----

#2) 34

#3) 54

#4) 7.3

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Find the value of R so that the line that passes through each pair of points has the given slope: (8, -2 ), (r, -6), m=-4

kondor19780726 [428]

$\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
&({{ 8}}\quad ,&{{ -2}})\quad 
% (c,d)
&({{ r}}\quad ,&{{ -6}})
\end{array}
\\\\\\
% slope = m
slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ y_2}}-{{ y_1}}}{{{ x_2}}-{{ x_1}}}\implies \cfrac{-6-(-2)}{r-8}=-4
\\\\\\
\cfrac{-6+2}{r-8}=-4\implies -4=-4(r-8)\implies \cfrac{-4}{-4}=r-8\\\\\\ 1+8=r$

8 0

3 years ago

Identify the property used in Step 3.

svp [43]

The associative property has been used in step 3

Step-by-step explanation:

There are multiple properties that are used to solve the equations

One of them is associative property.

Associative property states that the order of three terms which are being added doesn't matter the result will be same.

$a + (b+c) = (a+b)+c$

In step 2:

$2 + 2x + 10 + (-10 + 11x)$

As we can see that the last three terms are being added

The solver has used the associative property to solve the expression.

$2 + 2x + [10 + (-10)] + 11x$

The brackets have been changed from $10+(-10+11x)\ to\ [10 + (-10)} +11x$ using associative property

The associative property has been used in step 3

Keywords: Properties , expressions

Learn more about expressions at:

#LearnwithBrainly

5 0

4 years ago

Is _____. hjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj

san4es73 [151]

Answer:

o.6

Step-by-step explanation:

I think sorry if wrong

7 0

3 years ago

Read 2 more answers

For what values of x is the graph of y equals negative 3 divided by the quantity 4 plus x concave downward?

Elena-2011 [213]

We are given our function as

$y=\frac{-3}{x+4}$

For finding concavity , firstly we will find second derivative

$y'=\frac{d}{dx}\left(\frac{-3}{x+4}\right)$

$=-3\frac{d}{dx}\left(\frac{1}{x+4}\right)$

$=-3\left(-\frac{1}{\left(x+4\right)^2}\right)\cdot \:1$

$y'=\frac{3}{\left(x+4\right)^2}$

now, we can find derivative again

$y''=\frac{d}{dx}\left(\frac{3}{\left(x+4\right)^2}\right)$

$=3\frac{d}{dx}\left(\left(x+4\right)^{-2}\right)$

$y''=3\left(-\frac{2}{\left(x+4\right)^3}\right)\cdot \:1$

$y''=-\frac{6}{\left(x+4\right)^3}$

now, we can know second derivative is undefined when denominator =0

so, we set denominator =0

and then we can solve for x

$x+4=0$

$x=-4$

now, we can draw a number line and locate x=-4

and then we can find sign of second derivative on each intervals

so,

Concave downward interval:

$(-4,\infty)$

6 0

3 years ago

you want to put $8000 in a simple interest account. it has 2% annual interest rate. how long less you have invest that money to

Lisa [10]

Answer:

3 years

Step-by-step explanation:

160 per year, 160*2=320, 160*3=480

5 0

3 years ago