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2 years ago

I’m confused can ya help me

Mathematics

1 answer:

Harlamova29_29 [7]2 years ago

7 0

Answer:

C & D

Step-by-step explanation:

x² + 3x - 3 = 0

a = co efficient of x² = 1

b= co efficient of x = 3

c = constant = -3

roots = (-b ± $\sqrt{b-4ac}$ )/2a

= (-3± $\sqrt{3^{2}-4*1*[-3]}$ )/2*1

= (-3± $\sqrt{9+12}$ )/2

= (-3±√21)/2

$x = \frac{-3+\sqrt{21}}{2} ; x =\frac{-3-\sqrt{21}}{2}$

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A) be 85° 120° (2x - 10° X

Lunna [17]

Let's see what to do buddy...

_________________________________

Step (1)

We know that the sum of the interior angles of any n-sided figure is obtained from the following equation :

$(n - 2) \times 180$

Our figure has 5 sides ;

So , sume the interior angles of it equals :

$(5 - 2) \times 180 = 3 \times 180 = 540 \\$

_________________________________

Step (2)

First look at the photo which I post.

According it we have :

$(180 - x) + 120 + 85 + (2x - 10) + 90 = 540 \\$

$2x - x + 475 - 10 = 540$

$x + 465 = 540$

Subtract the sides of the equation minus 465 :

$x = 540 - 465$

$x = 75$

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And we're done.

Thanks for watching buddy good luck.

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3 0

3 years ago

A discovery in New Jersey actually contributed to the

Butoxors [25]

Correct option is B. A discovery in New Jersey actually contributed to the

early economic development of America and, in 1714, a worker uncovered a green rock containing copper.

Here, the use of conjunction 'and' is incorrect as it creates a kind of distortion which seems as if we are talking about two different things: rather then linking the two parts of the sentence, 'and' further disconnects it.

"When" seems better than "And". It clearly indicates the mentioned time. Thus B is the correct answer.

To learn more about copper from given link

brainly.com/question/24856041

#SPJ4

4 0

1 year ago

El valor de 2 – 3(5 + 2)(5 – 8) es

Margarita [4]

Answer:

Step-by-step explanation:

2 - 3 ( 5 + 2 ) ( 5 - 8 )

= 2 - 3 ( 7 ) ( -3 )

= 2 + 63

= 65

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2 years ago

A gym charges $45 per month and a $75 one-time starting fee. Which of these will show how much it costs to join the gym for one

Sauron [17]

Answer: 615

Step-by-step explanation: you take the 45 times 12 months plus the 75 for the one time fee.

4 0

3 years ago

Read 2 more answers

A science experiment involves periodically measuring the number of mold cells present on a piece of bread. At the start of the e

fomenos

Answer:

y = 50·3^x
(2, 450), (3, 1350), (4, 4050), (5, 12150)

Step-by-step explanation:

The problem statement tells you each observed count is 3 times the last one.

Expressed as an exponential function with an initial value of 50 and a growth factor of 3, the formula is ...

y = (initial value)×(growth factor)^x

y = 50·3^x

3 0

3 years ago