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True [87]
3 years ago
11

From a standard deck of cards, your first draw is a black card. You replace the card, and the second draw is a diamond. Which TH

REE statements are correct for the outcome of the event? A) The probability of drawing the black card is 1/2 B) The probability of drawing the diamond is 1/4 C)The probability of the compound event is 1/6 D) The probability of the compound event is 1/8 E) The probability of the compound event is 3/4 ​
Mathematics
1 answer:
ladessa [460]3 years ago
4 0
A, B, D

A: because there are two colour types in a deck of cards, so it’s 1/2 probability of getting a black one.

B: because there a four suits in a deck of cards, so the probability of getting a diamond is 1/4

D: because when calculating compound events we multiply the two probabilities,
so 1/2 x 1/4 = 1/8

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What is the value of m in the equation 1/2 m - 3/4n=16 when n=8
zhuklara [117]
1/2m - 6= 16
1/2m=22
m= 44
6 0
2 years ago
Find the number of real- number solutions of the equation x^2+10=2
Andrew [12]

Answer:

imaginary

Step-by-step explanation:

x {}^{2}  = 2 - 10 \\  {x}^{2}  =  - 8 \\ x =  \sqrt{ - 8}

from the working strp, we know that the number is imaginary

we can't square root the negative number

4 0
3 years ago
C equals 2 pi r​; Cequals62.8 ​(Circumference of a​ circle)
tatuchka [14]

Answer:

about 10

Step-by-step explanation:

62.8 = 2 pi r/2

62.8/2 = pi r

31.4/pi = pi r/pi

about 10 = r

3 0
3 years ago
Jimmy cell phone plan has been a base charge of $50 per month with an additional charge of 65 cents per app downloaded. Lisa cel
Soloha48 [4]

Answer:

20

Step-by-step explanation:

We write what we know.

Jimmy

$50/mo   app 65¢ or .65

Lisa

$55/mo   app 40¢ or .40

a = number of apps

The difference will come from the number of apps, a.

We need them to equal each other so let's write an equation.

$50 + .65a = $55 + .40a

We need to solve for a.

$50 + .65a = $55 + .40a     subtract $50 for each side.

$50 - $50 + .65a = $55 - $50 + .40a

.65a = $55 - $50 + .40a

.65a = $5 + .40a     subtract .40a from each side

.65a - .40a = $5 + .40a - .40a

.65a - .40a = $5

.25a = $5   Divide each side by .25

.25a/.25 = $5/.25

a = $5/.25

a = 20

So Jimmy and Lisa need to download 20 apps for their bill to be the same.

7 0
3 years ago
HELLPPPPP IDK WHAT TO DOOO
vesna_86 [32]

The formula can be written in the form ...

... T = (original temperature) + x·(change in temperature each minute)

The problem statement gives you the original temperature (21 °C) and tells you the temperature after 12 minutes. You have to use that information to figure out the change in temperature each minute.

The change in temperature in 12 minutes is (75 °C) - (21 °C) = 54 °C. That is the change in 12 minutes, so the change in 1 minute will be 1/12 of that:

... 54/12 = 4.5

Using this value in the equation for T, we have

... T = 21 + 4.5x

6 0
3 years ago
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