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Alla [95]
3 years ago
15

Find the value of x.

Mathematics
1 answer:
stiv31 [10]3 years ago
3 0

Answer:

9 is the value of x.

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The current l, in a circuit varies inversely with the resistance, R. If the resistance is 12 when the current is 3, what is the
ivolga24 [154]

Answer:

6

Step-by-step explanation:

Given I varies inversely with R then the equation relating them is

I =  \frac{k}{R} ← k is the constant of variation

To find k use the condition R = 12 when I = 3

k = IR = 3 × 12 = 36

I = \frac{36}{R} ← equation of variation

When I = 6, then

6 = \frac{36}{R}, hence

R = \frac{36}{6} = 6

4 0
3 years ago
Does the table show evidence of an association
Tanzania [10]

Answer:

Does the table show evidence of an association between not taking piano lessons and not attending an Ivy League school? From the table, the joint relative frequency for people who did not take piano lessons and who did not attend an Ivy League school is the greatest

8 0
2 years ago
Which of the following shows that polynomials are closed under addition when two polynomials 4x2 − 8x − 7 and −5x + 16 are added
Artyom0805 [142]
First we have to combine like terms. 4x² is one term. -8x is another term. -7 is another term. poly = "many" ⇒ polynomial = many terms

(4x² - 8x - 7) + (-5x + 16)

4x² - 8x - 7 - 5x + 16

Combine like terms.
Step 1: 4x² has no other terms with x² so it stays by itself.
Step 2: -8x and -5x are like terms because they both have x.
So -8x -5x = -13x (You put two negatives together)
Step 3: -7 and 16 don't have any x with them. -7 + 16 = 16 - 7 = 9

Now we put all the answers of the steps together.
Step 1: 4x²
Step 2: -13x
Step 3: 9

So the answer is 4x² - 13x +9
And it's a polynomial because there are three terms = "more than one term"

4 0
4 years ago
Car a is 30 miles ahead of car b car a is going 60 mph and car b is going 70 mph how long will it take car b to catch car a
frez [133]

Answer:

3 hours

Step-by-step explanation:

After one hour, car a will be only 20 miles ahead of car b, after two hours, car a will only be 10 miles ahead of car b, and after 3 hour, they will both be equal. This is because car b is going 10 mph faster than car a, because 70-60=10. every hour, car b will catch up to car a by 10 miles.

Leave a thanks if I am correct

4 0
3 years ago
Problem solving exercise 3d+d-7=25/4
Ad libitum [116K]
First, 4d-7=25/4
Then,4d=53/4.
Then you cross multiply, to get 16d = 53. Your final answer is 53/16, or 3 5/16. 
3 0
3 years ago
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