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stealth61 [152]
4 years ago
9

HELP ASAP 2 QUESTIONS 20 POINTS

Mathematics
2 answers:
JulijaS [17]4 years ago
3 0
70%.

35 red marbles.
15 other marbles
50 total marbles

The chance of getting a red marble is 35 / 50

Multiply that by 2/2 to get a percentage

35/50 = 70/10. 70%70%

There are 35 red marbles
15 other marbles

The odds of drawing a red one are 35/50
Multi0y by 2/2 to make it a percentage

35/50 * 2/2 = 70/100 = 70%.
Gala2k [10]4 years ago
3 0
This is just a guess but I'm thinking it would be 70% , because there is a high probability of drawing a red marble.<span />
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Masteriza [31]

Answer:

(x + 5)^2 = (5 - 3)^2

Step-by-step explanation:

Given the equation;

x^2 + 10x + 22 = 13

We have;

x^2 + 10x = 13 - 22

x^2 + 10x = -9

Adding half of 10 to both sides and completing the square as usual, we have;

(x + 5)^2 = 5^2 + (-9)

(x + 5)^2 = (5 - 3)^2

5 0
3 years ago
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A calculator is required to obtain the final answer on this question. A solid metal sphere at room temperature 20oC is dropped i
yKpoI14uk [10]

Answer:

T = 47.1875°C

Step-by-step explanation:

Given:

Surrounding temp, Ts = 100°C

Initial Temperature ,T0= 20°C

Increase in temperature = 15°C

Final temperature, T = 20 + 15 = 35°C

Time, t = 9 seconds

Let's take Newton's law of cooling:

T - Ts = (T_0 - Ts)e^k^t

We'll solve for k

35 - 100 = (20 - 100)e^9^k

-65 = (-80)e^9^k

Divide both sides by -5

13 = (16)e^9^k

9k = ln (\frac{13}{16})

k = \frac{1}{9} ln (\frac{13}{16})

k = -0.02307104053

Let's now find the temperature of the ball after 18 seconds in boiling water.

Use the Newton's equation again:

T - Ts = (T_0 - Ts)e^k^t

T - 100 = (20 - 100)e^-0.0^2^3^0^7^1^0^4^0^5^3^*^1^8

T - 100 = (-80)e^-0.0^2^3^0^7^1^0^4^0^5^3^*^1^8

T - 100= -52.8125

T = 100 - 52.8125

T = 47.1875°C

Temperature of the ball after 18 seconds in boiling water is 47.1875°C

5 0
4 years ago
What's the midpoint?
Sergio [31]

Answer: 39,950

Step-by-step explanation: To find median, add the two numbers and divide by two, and you shall get the Answer!!!

WATER!!

4 0
3 years ago
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The ellipse with center C(2, -3), vertices V(-8,-3) and V2(12,-3), and foci F1(-4,-3) and F2(8,-3). 6.
attashe74 [19]

Answer:

(x-2)²/100 + (y+3)²/64 = 1

Step-by-step explanation:

C (2,-3): h=2 k=-3

semimajor axis (CV): a=12-2=10

center-foci: c=8-2=6

semi minor axis: b² = a²-c²= 100 - 36 = 64

equation: (x-h)²/a² + (y-k)²/b² = 1

(x-2)²/100 + (y+3)²/64 = 1

6 0
3 years ago
Convert 36°F to degrees Celsius.
scoray [572]

Answer:

I think once you do the math you'd get 2.22 celsius.

Step-by-step explanation:

8 0
3 years ago
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