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2 years ago

The sum of a number and 12 is -3. What is the number?

Mathematics

2 answers:

Anna35 [415]2 years ago

6 0

Answer:

-9?

Step-by-step explanation:

Andreyy892 years ago

6 0

To get to -3 with positive 12 change the 12 to negative then the answer is -15+12=-3

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If you have an average 90. Give two numbers other than 90 that would make the average 90

klemol [59]

Answer:

The numbers 180 and 0 would make the average 90

Step-by-step explanation:

we know that

To find the average of two numbers, add the numbers and then divide by two.

Let

x ----> one number

y ----> the other number

The average is equal to

(x+y)/2

For x=180 and y=0

the average is equal to

(180+0)/2=90

therefore

The numbers 180 and 0 would make the average 90

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2 years ago

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ivanzaharov [21]

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Step-by-step explanation:

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2 years ago

A university knows from historical data that 25% of students in an introductory statistics class withdraw before completing the

Vikki [24]

Answer:

13.4%

Step-by-step explanation:

Use binomial probability:

P = nCr p^r q^(n-r)

where n is the number of trials,

r is the number of successes,

p is the probability of success,

and q is the probability of failure (1-p).

Here, n = 16, r = 2, p = 0.25, and q = 0.75.

P = ₁₆C₂ (0.25)² (0.75)¹⁶⁻²

P = 120 (0.25)² (0.75)¹⁴

P = 0.134

There is a 13.4% probability that exactly 2 students will withdraw.

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3 years ago

find the value of the variable. if your answer is not an interger, leave it in simplest radical form.

kotykmax [81]

Answer:

Step-by-step explanation:

using the sine ratio in the right triangle, then

sin 45° = $\frac{opposite}{hypotenuse}$ = $\frac{x}{5}$

multiply both sides by 5

note the exact value of sin 45° = $\frac{\sqrt{2} }{2}$

x = 5 × sin 45° = 5 × $\frac{\sqrt{2} }{2}$ = $\frac{5\sqrt{2} }{2}$

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3 years ago

The sum of a number and 12 is -3. What is the number?​

The sum of a number and 12 is -3. What is the number?