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Delicious77 [7]
3 years ago
12

Help plz:))) I’ll mark u brainliest ASAP!!!

Mathematics
2 answers:
ss7ja [257]3 years ago
7 0

Answer:

x=10

Step-by-step explanation:

3x-20=10

add 20 to both sides

3x=30

divide 3 both sides

end with x=10

Slav-nsk [51]3 years ago
5 0

Answer:

x=10

Step-by-step explanation:

it's a equilateral triangle So its every sides are equal

So the equation is

3x-20=10

=>3x=10+30

=>3x=30

=>x=30/3

therefore

x=10

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Round 62,322,118,987 . Write the result as the product of a single digit and a power of 10.
Firlakuza [10]

Answer:

6.2 x 10^10

Step-by-step explanation:

5 0
3 years ago
Identify the​ vertex, the axis of​ symmetry, the maximum or minimum​ value, and the range of the parabola for y=x^2+6x+13
charle [14.2K]

Answer:


Step-by-step explanation:

First we can determine the x value of our vertex via the equation:

x=\frac{-b}{2a}

Note that in general a quadratic equation is such that:

ax^2+bx+c

In this case a,b and c are the coefficients and so a=1, b=6 and c=13.

Therefore we can determine the x component of the vertex by plugging in the values known and so:

x=\frac{-b}{2a}=\frac{-6}{2(1)}=\frac{-6}{2}=-3

Now we can determine the y-component of our vertex by plugging in the x-component to the equation and so:

f(x)=x^2+6x+13\\\\f(-3)=(-3)^2+6(-3)+13\\\\f(-3)=4

Therefore our vertex is (-3,4).  Now in vertex our x component determines is the axis of symmetry so the equation for axis of symmetry is:

x=-3

Similarly, the y-component of our vertex is the minimum or maximum.  In this case it is the minimum you can determine this because a is positive meaning that the parabola will point up, and so the equation for the  minimum is:

y=4

The range of the formula is the smallest y-value meaning the minimum y=4 and all real numbers that are more than 4, mathematically:

Range = All real numbers greater than or equal to 4.

4 0
3 years ago
What is the r^2 value of the following data to three decimal places???
GaryK [48]

Answer:

0.783

Step-by-step explanation:

To find first r and then r square for the data

correlation coefficient of x and y = Cov (x,y)/std dev x * std dev Y

Cov (x,y) = E(xy) -E(x)E(y)

Hence calculations would be as follows:

x y xy

 

1 2 2

2 10 20

5 5 25

7 18 126

10 25 250

 

Mean 5 12 84.6

 

Cov E(xy)-E(x)E(y)  24.6

r 0.884640297

r^2 0.782588454

so answre is 0.783 after rounding off.

4 0
3 years ago
Danny charges $35 for 3hrs of swimming lessons. Martin charges $24 for 2hrs is swimming lessons. Who offers a better deal?
Alexeev081 [22]
The better deal is danny
4 0
3 years ago
Read 2 more answers
a. choose a credit card balance between $5,000 and $20,000, using a 16% APR (the current average credit card interest rate). b.
Scrat [10]

Answer:

344543

Step-by-step explanation:

88-3x=23y

6 0
3 years ago
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