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Harman [31]
3 years ago
15

Please help me so confused Solve. x^2 + 3x − 7 = 0 Enter your answers, as exact values, in the boxes. x = or x =

Mathematics
2 answers:
Rzqust [24]3 years ago
6 0

Answer:

x = -1/2 ( 3±sqrt(37))

Step-by-step explanation:

x^2 + 3x − 7 = 0

Add 7 to each side

x^2 + 3x =7

Using complete the square

Taking the coefficient of x

3

Divide by 2

3/2

Square it

(3/2)^2 = 9/4

Add this to each side

x^2 + 3x+ 9/4 = 7+9/4

( x+ 3/2) ^2 = 28/4 + 9/4

( x+ 3/2) ^2 = 37/4

Take the square root of each side

x+3/2 = ±sqrt(37/4)

x+3/2 = ±sqrt(37) / sqrt(4)

x+ 3/2 = ±sqrt(37) / 2

Subtract 3/2 from each side

x = -3/2 ±sqrt(37) / 2

x = -1/2 ( 3±sqrt(37))

igomit [66]3 years ago
5 0

Answer:

-1.5 -√9.25 or -1.5 +√9.25

Step-by-step explanation:

x^2 + 3x - 7 = 0

This will not factor so we can use completing the square:

x^2 + 3x = 7

(x + 1.5)^2 - 2.25 = 7

(x + 1.5)^2 = 9.25

x + 1.5 = ±√9.25

x = -1.5 ±√9.25

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Approximately how many meters are equal to 11.4 feet?Note: 1 m≈3.3 ftRound your answer to the nearest hundredths.
notka56 [123]

Alright, lets get started.

We are asked, approximately how many meters are equal to 11.4 feet.

We have given that,

3.3  feet = 1 meter

So,  1 feet = \frac{1}{3.3} meter

So, 11.4 feet = 11.4 *\frac{1}{3.3} meter

11.4 feet = \frac{11.4}{3.3} meter

11.4 feet = 3.45 meters   :    Answer

Hope it will help :)

3 0
3 years ago
A corn field has an area of 48,000 square. Ft. The width of the field is 300 feet.
iren2701 [21]

Step-by-step explanation:

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l = 160 ft

8 0
3 years ago
I WILL GIVE 100 POINTS TO THOSE WHO ANSWER THIS QUESTION RIGHT.What is the solution to the inequality 3+5/7x>1+x?
harina [27]

Answer:

C: X <= 7

Step-by-step explanation:

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8 0
3 years ago
In the problem 100 divided by 25 equals 4 the the what is 100
Mekhanik [1.2K]

Answer:

<em>Dividend</em>

Step-by-step explanation:

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So 100 is a dividend.

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6 0
3 years ago
J(–6, 2) and K(3, 2) are the endpoints of the base of an isosceles triangle. Give the x-coordinate of the third vertex.
Korvikt [17]

Answer:

Step-by-step explanation:

If you plot J and K in a coordinate plane, you see that the line formed is a perfectly horizontal line through y = 2.  In order for this triangle to be an isosceles, the third x-coordinate would have to be located midway through the x-coordinates of the base.  The midpoint between the x-coordinates is found by adding the 2 x-coordinates and dividing the sum by 2.  -6+\3 = -3 and -3/2 = -3/2.  So the x-coordinate is -3.2 or -1.5

4 0
3 years ago
Read 2 more answers
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