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3 years ago

R^2+6r-27 factoring quadratics

Mathematics

1 answer:

Vanyuwa [196]3 years ago

5 0

Answer:

(r + 9)(r - 3)

Step-by-step explanation:

r² + 6r - 27 =

= r² + 9r - 3r - 27

= r(r + 9) - 3(r + 9)

= (r + 9)(r - 3)

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I have trouble with these two questions, even i did my equation but i don’t get the answers

Sophie [7]

Answer:

$318.17, out of state college is $161.12 cheaper per month

Step-by-step explanation:

72*24 = 1728 + 410*4 = 1728 + 1640 = 3368 + 450 = 18/12 = $318.17

8700+650*9 = 8700 + 5850 = 14550/9 = 1616.66

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3 years ago

Solve this system of linear equations. Separate the x- and y-values with a comma.

vodomira [7]

Answer:

x = $\frac{5}{2}$ , y = $\frac{5}{4}$

Step-by-step explanation:

1. Isolate for x in one of the equations:

2x = 9x - 14y

2x-9x = 9x-9x -14y

-7x = -14y

-7x/-7 = -14y/-7

x = 2y

2. Substitute 2y in for x in the second equation:

9(2y) = 40 - 14y

3. Simplify:

18y = 40 - 14y

4. Isolate for y:

18y+14y = 40 -14y+14y

32y = 40

32y/32 = 40/32

y = $\frac{5}{4}$

5. Substitute the new y-value into the simplified expression x = 2y:

x = 2(5/4)

x = $\frac{5}{2}$

hope this helps!

7 0

2 years ago

Is 69 degrees a vertical or adjacent? please help thank you

Anna71 [15]

Answer:

Adjacent

Step-by-step explanation:

Vertical would be 90 degrees

3 0

3 years ago

What is the point and slope of the line represented by the equation below?

alexandr1967 [171]

The answer is B because the slope is always the one multiplying the x and the 1 is negative because the equation is y-y1=m(x-x1)

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3 years ago

what information is necessary to prove the triangles congruent by ASA? by AAS ? show your work please.

Zielflug [23.3K]

Answer:

See Explanation

Step-by-step explanation:

For ASA

$\angle R \cong \angle E$

$RQ \cong EF$

$\angle Q \cong \angle F$

$\triangle PRQ \cong \triangle GEF$

For AAS

$\angle P \cong \angle G$

$\angle R \cong \angle E$

$RQ \cong EF$

$\triangle PRQ \cong \triangle GEF$

3 0

3 years ago