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sveticcg [70]
2 years ago
9

Solve for x in the equation x squared + 2 x + 1 = 17.

Mathematics
1 answer:
PtichkaEL [24]2 years ago
5 0

Step-by-step explanation:

quadratic formula

<u>-b+-√b^2</u>

<u>2</u><u>a</u>

<u>-</u><u>2</u><u>+</u><u>-</u><u>√</u><u>2</u><u>^</u><u>2</u><u>-</u><u>4</u><u>×</u><u>1</u><u>×</u><u>-</u><u>1</u><u>6</u>

2×1

<u>-2+-√68</u>

2

either

x= 3.125

or

x= -5.125

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The jar's inner dimensions of the jar are approximately a cylinder with a height of 18
mars1129 [50]

v = \pi \times  {r}^{2}  \times h

v = \pi \times 49 \times 18

v = 2770.88

3 0
3 years ago
The radius of a circle is 8 units.<br> What is the diameter of the circle?<br> units
kondaur [170]

Answer:

16

Step-by-step explanation:

radius is 1/2 of diameter

8 0
3 years ago
Read 2 more answers
Use r =27 &amp; x =3<br><br> <img src="https://tex.z-dn.net/?f=-%5Cfrac%7Br%7D%7B9%7D%2B%205x" id="TexFormula1" title="-\frac{r}
MrRa [10]

Answer:

12

Step-by-step explanation:

First substitute the equation with the variable replacements given:

-r/9 + 5x <--- Before

-27/9 + 5(3) <--- After

Next Solve the parts of the Equation

-27/9 + 5(3)

-3 + 15 <--- -27 divided by 9 is -3, 5 times 3 is 15.

= 12 <--- 15 - 3 = 12.

I hope this helps!

4 0
3 years ago
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Hey I could use some help on this assignment
Zarrin [17]

Answer:

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Step-by-step explanation:

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5 0
2 years ago
Dill and Bromberg, Problem 1.23. The San Francisco football team plays better in fair weather. They have a 70% chance of winning
shtirl [24]

Answer:

a) 40% probability that San Francisco will win.

b) 80% probability that the weather was bad

Step-by-step explanation:

We have these following probabilities:

60% chance of snow(bad weather).

If there is bad weather, 20% probability of SF winning.

100-60 = 40% chance of good weather.

If there is good weather, 70% probability of SF winning.

(a) If they play in the Super Bowl in Wisconsin and the weatherman predicts a 60% chance of snow that day, what is the probability that San Francisco will win.

20% of 60%, plus 70% of 40%. So

0.2*0.6 + 0.7*0.4 = 0.4

40% probability that San Francisco will win.

(b) Given that San Francisco lost, what is the probability that the weather was bad?

We use the conditional probability formula to solve this question.

Conditional probability:

We use the conditional probability formula to solve this question. It is

P(B|A) = \frac{P(A \cap B)}{P(A)}

In which

P(B|A) is the probability of event B happening, given that A happened.

P(A \cap B) is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: SF losing

Event B: Bad weather

P(A)

From a), 40% probability that SF wins. So 100-40 = 60% = 0.6 probability that SF losses.

So P(A) = 0.6

P(A and B)

60% chance of snow. If it snows, 80% probability of SF losing. So

P(A \cap B) = 0.6*0.8 = 0.48

P(B|A) = \frac{0.48}{0.60} = 0.8

80% probability that the weather was bad

6 0
3 years ago
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