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2 years ago

15, -19, 23, -27.. how would you write that in sigma notation?

Mathematics

1 answer:

sertanlavr [38]2 years ago

3 0

Answer: i think its zero

Step-by-step explanation:

or u can just look it up on an sigma math calculator and that should give u the answer

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B - (-8) = -3 what is the value of b

scoundrel [369]

B - (-8) = -3

distribute - into (-8) making it +8

b + 8 = -3

subtract 8 from both sides

b + 8 = -3
-4 -4

b = -5

ANSWER B=-5

5 0

4 years ago

I will mark the best answer as brainliest.

olga nikolaevna [1]

Step-by-step explanation:

use the pythagoras theory.

a2 + b2 = c2

the firth one use this formula

a2 = c2 - b2

a2 = 10.6² - 5.6²

a2 = 112.36 - 31.36

a2 = 81

a = 9

The same method use to the eighth one

4 0

3 years ago

Read 2 more answers

Complete the equation 9/4= ? ÷ by 4

Stells [14]

Answer:

$9$

Step-by-step explanation:

$9/4$ can be said as " $9$ divided by $4$ ", so the ? is $9$ .

8 0

3 years ago

A quadratic relation has zeros at 3 and –5. The parabola goes through the point (2, –14). What is the equation of the parabola i

olasank [31]

Answer:

$\displaystyle 2 {x}^{2} + 4x - 30 = 0$

Step-by-step explanation:

we are given the zeros and a point where it goes through of a quadratic equation

remember that when the roots are given then the function should be

$\displaystyle \: y = a(x - x_{1})(x - x_{2})$

where a is the leading coefficient and x1 and x2 are the roots

substitute:

$\displaystyle y = a(x - (3))(x - ( - 5))$

simplify:

$\displaystyle y = a(x - 3)(x + 5)$

now the given point tells us that when x is 2 y is -14 therefore by using the point we can figure out a

substitute:

$\displaystyle a(2 - 3)(2 + 5) = - 14$

simplify parentheses:

$\displaystyle a( - 1)(7) = - 14$

simplify multiplication:

$\displaystyle - 7a = - 14$

divide both sides by -7:

$\displaystyle a = 2$

altogether substitute:

$\displaystyle y = 2(x - 3)(x + 5)$

since it want the equation y should be

$\displaystyle 2(x - 3)(x + 5) = 0$

recall quadratic equation standard form:

$\displaystyle {ax}^{2} + bx + c = 0$

so simplify parentheses:

$\displaystyle 2( {x}^{2} + 2x - 15 ) = 0$

distribute:

$\displaystyle 2 {x}^{2} + 4x - 30 = 0$

hence,

the equation of the parabola in standard form is 2x²+4x-30=0

8 0

3 years ago

How do you solve this

Maru [420]

Divide 7 by 20 to get the decimal form of 7/20 and then see which one of the statistics match it should be the on base statistic

7 0

3 years ago