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valina [46]
3 years ago
8

15 POINTS AND BRAINLIEST JUST HELP ME PLZZZZZ 4x^2 + 28x + 49 = 0 Rewrite equation (x + __ )^2 = __

Mathematics
2 answers:
TEA [102]3 years ago
7 0

Answer:

\boxed{(x+7)^2 =-3x^2-14x}

Step-by-step explanation:

4x^2 + 28x + 49 = 0

\sf Subtract \ 3x^2 \ and \ 14x \ from \ both \ sides.

4x^2 + 28x + 49 -3x^2-14x= 0-3x^2-14x

x^2 + 14x + 49 = -3x^2-14x

\sf Factor \ left \ side \ of \ the \ equation.

(x+7)^2 =-3x^2-14x

marin [14]3 years ago
4 0

Answer:

(x+7)² = -3x² -14x

Step-by-step explanation:

4x^2 + 28x + 49 = 0

Subtract 3x² and 14x from each sides.

x^2 + 14x + 49 = -3x² -14x

Next step will be factoring.

(x+7)² = -3x² -14x

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A person whose eye level is 15 feet above the ground is looking at a building. The angle of elevation to the top of the building
uysha [10]

Answer:

61.97 feets

Step-by-step explanation:

Using trigonometry :

Horizontal distance between the person and building,

Let distance = d

Tan 15 = 15 / d

0.2679491 * d = 15

d = 15 / 0.2679491

d = 55.980781

To obtain the height, h :

tan 40 = (h-15)/d

d = 55.98

h-15 = 55.98 (tan 40°)

h - 15 = 55.98 * 0.8390996

h - 15 = 46.972797

h = 46.972797 + 15

h = 61.972797

h = 61.97 feets

4 0
3 years ago
If the product of two positive integers is 180 and the larger number is 5 times the smaller number, what are the numbers
Lubov Fominskaja [6]
Let the smaller number be x
The bigger number is 5x

5x(x) = 180
5x² = 180
x² = 180÷5
x²=36
x=√36
x = 6 

x=6
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So the two numbers are 6 and 30
7 0
3 years ago
Please help me! It would be amazing if you can!
jasenka [17]

Answer:

B

Step-by-step explanation:

7 0
3 years ago
Determine if each expression is equivalent to -2.7 + (-4.9)
PSYCHO15rus [73]
A (-2. 7) -4. 9
B (-2.7+(-.4- 4.5)
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8 0
4 years ago
Read 2 more answers
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GREYUIT [131]
X = 4 is a vertical line and only a horizontal line can be perpendicular to it.
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