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Ket [755]
2 years ago
11

I need to find the value of x

Mathematics
1 answer:
WITCHER [35]2 years ago
3 0

2x-75+x+35+2x-20=180\\\\5x=240\\\\x=48

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A deck of 52 cards is shuffled. The first five cards of the deck are red. What is the probability that the last card in the deck
saveliy_v [14]

Answer:

The answer is "\frac{1}{47}".

Step-by-step explanation:

Although the five first players are red, the very first five cards are not spaded as the spad is a black card.  

Its chance of the final card mostly on deck being the ace of spades is therefore determined as:

= \frac{1}{\text{Number of remaining cards with the initial 5 cards}} \\\\= \frac{1}{47}

Thus, \frac{1}{47} here is the necessary chance.

7 0
2 years ago
Speed of a cycle 15 km per hour to the speed of scooter 30 km per hour. find the ratio<br>​
Andrei [34K]

Answer:

Cycle : Scooter = 15 : 30

or, Cycle : Scooter = 1 : 2

Step-by-step explanation:

7 0
2 years ago
What is normal, when it comes to people's body temperature? a random sample of 130 human body temperatures, provided by allen sh
nikitadnepr [17]
The two-sided alternative hypothesis is appropriate in this case, the reason being we are asked "does the data indicate that the average body temperature for healthy humans is different from 98.6◦........?".
The test statistic is:
Z= \frac{\bar{X}-\mu}{ \frac{s}{ \sqrt{n} } }} =-5.47
Using an inverse normal table, and halving \alpha for a two-tailed test, we look up p=0.5-\alpha/2=0.5-0.005=0.495 and find the critical value to be Z = 2.5758.
Comparing the test statistic Z = -5.47 with the rejection region Z < -2.5758 and Z > 2.5758. we find the test statistic lies in the rejection region. Therefore the evidence does not indicate that the average body temperature for healthy humans is different from 98.6◦.
 
7 0
2 years ago
a triangle has sides measuring 5 inches and 8 inches. if x respresents the length in inches of the third side, which inequality
WITCHER [35]

Answer:

When given 2 sides of a triangle, the third side must be:

Greater than the difference of the other 2 sides AND  

less than the sum of the other 2 sides.

So side "x" must be greater than

(8 -5) and less than (8 +5) or

3 < "x" < 13

Source: http://www.1728.org/trianinq.htm


Step-by-step explanation:


7 0
3 years ago
Read 2 more answers
Use the numbers 9 and 6 to illustrate the commutative property of addition.
In-s [12.5K]

Answer:

9 + 6 = 15

6 + 9 = 15

Step-by-step explanation:

Although the numbers have been swapped the answers stay the same

7 0
3 years ago
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