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kotykmax [81]
3 years ago
11

How is this solved 2x²+5x+7=20​

Mathematics
2 answers:
Angelina_Jolie [31]3 years ago
7 0
You’d use the quadratic formula:
X= -b +- √b^2-4ac
———————-
2a

And I attached your final answers

Sav [38]3 years ago
5 0

Answer:

you would have to use repletion

Step-by-step explanation:

2x^2+5x+7=20

             -7     -7

2x^2+5x=13

         /5    /5

2x^2+x=2.6

4+2x=2.6

-4      -4

2x=-1.4

/2     /2

x=-0.7

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a company promises to release model every month. each model's battery life will be 6% longer than the previous model's. if the c
Ratling [72]

The number of months that it will take the latest model's battery life to reach 1,008.9 minutes is; 8 months

<h3>How to solve geometric progression?</h3>

Each month, there is an increase by a factor of 0.06 of the previous months model.

From geometric sequence formula of aₙ = ar^(n - 1),

where;

a is first term

r is common ratio

aₙ is nth term

we have;

1,008.9 = 671 * 1.06^(n - 1)

1008.9/671 = 1.06^(n - 1)

In 1.504 = (n - 1) In 1.06

0.408 = (n - 1) * 0.058

n - 1 = 0.408/0.058

n = 7.03 + 1

n ≈ 8 months

Read more about geometric sequence at; brainly.com/question/24643676

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5 0
2 years ago
17. Subtract the quotient of 18 and 2 from the sum of 22 and 9.
Effectus [21]

Answer:

B. 22

Step-by-step explanation:

Quotient of 18 and 2 is 9, and just take the 9 out of the next series and you will be left with 22.

4 0
3 years ago
Read 2 more answers
A conical paper cup has a radius of 2 inches. Approximate, to the nearest degree, the angle β (see the figure) so that the cone
Aneli [31]
I don't know where the angle β is, so I will make the assumption that tanβ = h/r
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V volume = 60
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h = r tanβ

tan \beta = \frac{3V }{ \pi  r^{3} } = \frac{ 180}{25,1} = 7,17 \\  \\  \beta = 82
7 0
3 years ago
What is the value of this expression <br>5+(5-9)^2+3(16÷8)​
kaheart [24]

Answer:

27/4 or 6 3/4

Step-by-step explanation:

I can't put it in the box because its gonna take to long but it is correct

3 0
2 years ago
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Eight more than two times a number is fourteen
Fofino [41]

Answer: 3

Step-by-step explanation:

3x2 = 6

6+8=14

8 0
3 years ago
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