Mathematics, 22.05.2020 16:59 wakandafoodyoup9ioz4

Solve by completing the square

x^2-7x-30=0

Answers: 3

Show answers

Answers

Answer from: AceGravity

1. x=10 2.x=-3

Step-by-step explanation: hope this helps

Answer from: flowergirly34

There are two solutions

x = 10

x = -3

Step-by-step explanation:

Step-1 : Multiply the coefficient of the first term by the constant 1 • -30 = -30

Step-2 : Find two factors of -30 whose sum equals the coefficient of the middle term, which is -7 .

-30 + 1 = -29

-15 + 2 = -13

-10 + 3 = -7

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, -10 and 3

x2 - 10x + 3x - 30

Step-4 : Add up the first 2 terms, pulling out like factors :

x • (x-10)

Add up the last 2 terms, pulling out common factors :

3 • (x-10)

Step-5 : Add up the four terms of step 4 :

(x+3) • (x-10)

Which is the desired factorization

Step-6 : Switch the signs inside the parenthesis.

I hope I helped.

Answer from: Quest

answer

a the answer hopes this

step-by-step explanation:

Which table shows a proportional relationship?

Answer from: Quest

the system of inequity is

$y\leq -x+4$

$3y> x$

step-by-step explanation:

from the given graph it is noticed that we have two related lines. one is solid and another is dashed.

if a line passing through two points, then the equation of line is

$y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)$

the solid line passing through the points (0,4) and (4,0).

$y-4=\frac{0-4}{4-0}(x-0)$

$y=-x+4$

the related equation of solid line is $y=-x+4$ .

similarly, find the related equation of dashed line. the dashed liune passing through the points (0,0) and (3,1).

$y-0=\frac{0-1}{3-0}(x-0)$

$3y=x$

the related equation of dashed line is $3y=x$

from the given graph it is noticed that the point (0,1) lies on the shaded region, therefore the point (0,1) must be satisfied by the related equations.

check the related equations by the point (0,1).

$1=-0+4$

$1=4$

this statement is true if the sign of inequality is < instead of equality. since it is an solid line therefore the sign of inequality will be $\leq$ . the required inequality is

$y\leq -x+4$

similarly, check the second related equation.

$3(1)=0$

it is a dashed line, so this statement is true if the sign of inequality is > . the required inequality is

$3y> x$

15 points write a system of inequalities to represent the shaded portion of the graph

Another question on Mathematics

Mathematics, 21.06.2019 15:30

Find the slope of the line below . enter your answer as a fraction or decimal. use a slash mark ( / ) as the fraction bar if necessary

Answers: 1

Answer

Mathematics, 21.06.2019 18:30

Which of the statements about the graph of the function y = 2x are true? check all of the boxes that apply. the domain is all real numbers x because the exponent of 2 can be any real number when the x-values increases by 1 unit, the y-value multiplies by 2. the y-intercept is (0, 1). the graph never goes below the x-axis because powers of 2 are never negative. the range is all real numbers.

Answers: 1

Answer

Mathematics, 21.06.2019 19:50

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30

Answers: 1

Answer

Mathematics, 21.06.2019 22:30

Factor the polynomial by its greatest common monomial factor.

Answers: 1

Answer

You know the right answer?

Solve by completing the square

x^2-7x-30=0...