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3 years ago

Draw an area model to represent 40×60

Mathematics

2 answers:

lesya692 [45]3 years ago

7 0

Answer: I need help

Step-by-step explanation:

goblinko [34]3 years ago

6 0

40x 60 = 2400. so the area could be 2400.

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6. A set of data points has a correlation coefficient r = -0.86. Your friend claims

olga2289 [7]

Answer:

Yes

Step-by-step explanation:

The line of best fit is used in linear regression models to make predictions, the line of best fit gives the relationship between the dependent and independent variables by obtaining the Coefficient of correlation. The Coefficient of correlation is a value which ranges from - 1 to 1. With values close to either - 1 or 1 depicting a strong negative and positive relationship respectively. Hence, with a correlation Coefficient of - 0.86, which signifies a strong negative relationship, then we can go ahead and make prediction using the model.

7 0

3 years ago

Simplify your answer<br> 8c^3d^2/<br> 4cd^2

forsale [732]

Answer:

the answer is 42

Step-by-step explanation:

6 0

4 years ago

HELP !!!! can someone help me please how can i use the vertex formula to find this equation for this graph ?

DedPeter [7]

Based on that table of values, we know the highest point(vertex) is at 0.9, 5.9

we can also use just one another point... say 1.4, 4.6

$\bf \qquad \textit{parabola vertex form}\\\\
\begin{array}{llll}
y=a(x-{{ h}})^2+{{ k}}
\end{array} \qquad\qquad vertex\ ({{ h}},{{ k}})\\\\
-------------------------------\\\\$

$\bf \begin{cases}
h=0.9\\
k=5.9
\end{cases}\implies y=a(x-0.9)^2+5.9
\\\\\\
\begin{cases}
\textit{another point}\\
x=1.4\\
y=4.6
\end{cases}\implies 4.6=a(1.4-0.9)^2+5.9
\\\\\\
4.6=a(0.5)^2+5.9\implies 4.6-5.9=a(0.5)^2\implies -1.3=a(0.5)^2
\\\\\\
\cfrac{-1.3}{0.5^2}=a\implies -5.2=a
\\\\\\
thus\qquad \qquad \boxed{y=-5.2(x-0.9)^2+5.9}$

5 0

3 years ago

If correct I will give brainly

Marizza181 [45]

Answer:

Step-by-step explanation:

all you need to do is switch the x with 12

5 0

3 years ago

PLEASE HELP ASAP!!!!!

Nata [24]

Answer:

$\huge\boxed{\sf x = 20}$

Step-by-step explanation:

=> Since it is an equilateral (Having all angles and all sides equal) triangle, so every angles will be equal to the other.

=> The sum of the measures of interior angles of triangle add up to 180 degrees.

So,

3x + 3x + 3x = 180

9x = 180

Divide both sides by 9

x = 20

$\rule[225]{225}{2}$

Hope this helped!

7 0

3 years ago