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2 years ago

Select the symbol = (equal to) or ≠ (not equal to) to make the expression true. {0} ? { }

Mathematics

1 answer:

Sever21 [200]2 years ago

6 0

Answer:

Step-by-step explanation:

{0}={} because 0 means that there is nothing and in null set too, there is no elements.

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10. Plane A is flying at an altitude of 5000 feet. It starts descending (going down) at a rate of 100 feet per minute. Plane B i

lakkis [162]

It takes 6 minutes until they are flying at the same altitude..

Since Plane A is flying at an altitude of 5000 feet. It starts descending (going down) at a rate of 100 feet per minute, in time t, it descends a distance of 100t.

So, its distance from its original altitude is d = 5000 - 100t. (negative since it is descending)

Also, Plane B is flying at an altitude of 4100 feet. It starts ascending (going up) at a rate of 50 feet per minute. In time t, it ascends a distance of 50t.

So, its distance from its original altitude is D = 4100 + 50t. (positive since it is ascending)

So, to find the time the planes are flying at the same altitude, d = D

So, 5000 - 100t = 4100 + 50t

So, 5000 - 4100 = 100t + 50t

900 = 150t

dividing through by 150, we have

t = 900/150

t = 6 minutes

So, it takes 6 minutes until they are flying at the same altitude.

Learn more about plane altitude here:

brainly.com/question/13763638

8 0

3 years ago

Factor the algebraic expression 21a + 9

vladimir2022 [97]

Answer:

21a + 9

Simplifying

21a + 9

Reorder the terms:

9 + 21a

Factor out the Greatest Common Factor (GCF), '3'.

3(3 + 7a)

Final result:

3(3 + 7a)

HOPE THIS HELP

6 0

3 years ago

Read 2 more answers

Fourth-eight is what percent of 60

dsp73

48 is 80% of 60

48 of 60 can be written as 48/60

Multiply both the numerator and the denominator by 100
48/60 · 100/100 = 80/100 = .8 = 80%

If you are using a calculator, simply enter 48 ÷ 60 · 100 which will give you 80 as the answer.

6 0

3 years ago

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answer please help 50! Points!!! Name the factors that animals and humans use to determine echolocation

yuradex [85]

Answer:

sound

Step-by-step explanation:

blind humans can detect things by speaking or clicking their stick the same way animals send waves of sound to see things in their path.

7 0

3 years ago

What is the solution to the system of equations graphed below?