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Gnoma [55]
3 years ago
14

Solve x^2 + 5x + 6= 0

Mathematics
2 answers:
Anestetic [448]3 years ago
6 0

x = -3 or x = -2

Step-by-step explanation:

x² + 5x + 6 = 0

(x + 3)(x + 2)

x = -3 \/ x = -2

kodGreya [7K]3 years ago
6 0

Answer:

x₁ = (-2) , & x₂ = (-3).

Step-by-step explanation:

2² + 5x + 6 = 0

/\

2 3

x₂

  • (x + 2)
  • x + 2 = 0
  • x₁ = (-2)

x₁

  • (x + 3)
  • x + 3 = 0
  • x₂ = (-3)
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Solve this equation and explain the steps<br> 9-2x= 7x
Hunter-Best [27]

Answer:

x = 1

Step-by-step explanation:

Step 1: Write equation

9 - 2x = 7x

Step 2: Solve for <em>x</em>

<u>Add 2x on both sides:</u> 9 = 9x

<u>Divide both sides by 9:</u> x = 1

Step 3: Check

<em>Plug in x to verify it's a solution.</em>

9 - 2(1) = 7(1)

9 - 2 = 7

7 = 7

3 0
3 years ago
There are 6 bricks laid end to end to form a row in a flower garden each brick is 7 1/3 inches long how long is the row of brick
JulsSmile [24]

Answer:

The answer is 44 inches.

Step-by-step explanation:

6×7 1/3 = 44

6 0
3 years ago
Liam is making barbecue ribs over a fire. The internal temperature of the ribs when he starts cooking is 40°F. During each hour
Soloha48 [4]

Answer: You need to wait at least 6.4 hours to eat the ribs.

t ≥ 6.4 hours.

Step-by-step explanation:

The initial temperature is 40°F, and it increases by 25% each hour.

This means that during hour 0 the temperature is 40° F

after the first hour, at h = 1h we have an increase of 25%, this means that the new temperature is:

T = 40° F + 0.25*40° F = 1.25*40° F

after another hour we have another increase of 25%, the temperature now is:

T = (1.25*40° F) + 0.25*(1.25*40° F) = (40° F)*(1.25)^2

Now, we can model the temperature at the hour h as:

T(h) = (40°f)*1.25^h

now we want to find the number of hours needed to get the temperature equal to 165°F. which is the minimum temperature that the ribs need to reach in order to be safe to eaten.

So we have:

(40°f)*1.25^h = 165° F

1.25^h = 165/40 = 4.125

h = ln(4.125)/ln(1.25)  = 6.4 hours.

then the inequality is:

t ≥ 6.4 hours.

4 0
3 years ago
Which expression is the same as 6 times 52?
Blizzard [7]

Answer:

B

Step-by-step explanation:

6 times 50 = 300

6 times 2 = 12

300 + 12 = 312

6 times 52 = 312

4 0
3 years ago
Read 2 more answers
A system of equations is shown below. Which statement about the ordered pair (-7,-3) is true?
antoniya [11.8K]
Answer:

C) It is the only solution to the system.

Step-by-step explanation:

3x + 3y = -30

2x + y = -17

3(-7) + 3(-3) = -30

-21 + -9 = -30

-30 = -30

True

2x + y = -17

2(-7) + (-3) = -17

-14 + -3 = -17

-17 = -17

True

7 0
3 years ago
Read 2 more answers
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