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statuscvo [17]
3 years ago
5

The sum of 30 and twice a number is 48. Find the number?

Mathematics
1 answer:
lesya [120]3 years ago
3 0

Answer:

9 is the number

Step-by-step explanation:

Let's call this number x

The equation is:

30+2x=48

subtract 30 from both sides and you get

2x=18

divide 2 from both sides and you get

x=9

Therefore, 30+2(9)=48

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Can anyone help me with this geometry two column proof
Anastasy [175]

Answer:

Step-by-step explanation:

∠1 + ∠2 = 180                      Linear pair

∠4 + ∠5 +∠ 3 = 180             form straight line

∠1 + ∠2 = ∠4 + ∠5 + ∠3        from statement 1 and 2

∠3 +∠2 = ∠4 + ∠5 + ∠3          ∠1 and ∠3 are vertically opposite angles.

∠2 = ∠4 + ∠5                           Proved

3 0
3 years ago
A new bank customer with ​$2,000 wants to open a money market account. The bank is offering a simple interest rate of ​%1.1a. Ho
Goshia [24]

Answer:

$2220

Step-by-step explanation:

Step one

Given data

Principal= $2000

rate= 1.1%= 0.011

time= 10 years

<u>Required</u>

<u>The final amount A</u>

Step two;

For simple interest, the final amount is given as

A=P(1+rt)

substitute

A=2000(1+0.011*10)

A=2000(1+0.11)

A=2000(1.11)

A=2220

$2220

5 0
2 years ago
What is the answer to 2 - 6h when h = - 3
Oxana [17]


h=-3

<em><u>Substitute h in</u> 2-6h</em>

2-6h=

2-6*(-3)=2+18=20

<em>Answer: 20</em>

6 0
3 years ago
What does the fundamental theorem of algebra illustrate?
UNO [17]

Answer:

The fundamental theorem of algebra guarantees that a polynomial equation has the same number of complex roots as its degree.

Step-by-step explanation:

The fundamental theorem of algebra guarantees that a polynomial equation has the same number of complex roots as its degree.

We have to find the roots of this given equation.

If a quadratic equation is of the form ax^{2}+bx +c=0

Its roots are \frac{-b+\sqrt{b^{2}-4ac } }{2a} and \frac{-b-\sqrt{b^{2}-4ac } }{2a}

Here the given equation is 2x^{2}-4x-1 = 0

a = 2

b = -4

c = -1

If the roots are x_{1} and x_{2}, then

x_{1} = \frac{-2+\sqrt{(-4)^{2}-4\times 2\times (-1)}}{2\times 2}

                       = \frac{4 +\sqrt{24}}{4}

                       = \frac{2+\sqrt{6} }{2}

x_{2} = \frac{-2-\sqrt{(-4)^{2}-4\times 2\times (-1)}}{2\times 2}

                        = \frac{4 +\sqrt{8}}{4}

                        = \frac{2-\sqrt{6} }{2}

These are the two roots of the equation.

6 0
3 years ago
WORTH 100 POINTS. WILL GIVE BRIANLIEST. Six contestants on a reality TV show were stunned to find their lowest scoring colleague
Brut [27]

Answer:

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14 The victim wasn't electrocuted - Clue 5

14 Coach Omega was sleeping at the atrium - Clue 6

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169 The murder wasn't drowning - Clue 9

-274 Mr.Epsilon was swimming laps at a pool - Clue 10

is what i know, i will figure out in a bit! :D

Step-by-step explanation:

6 0
2 years ago
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