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3 years ago

What's the GCF for 12x+20?

Mathematics

1 answer:

saw5 [17]3 years ago

4 0

You need at least two polynomials in order to find a meaningful GCF.

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What happens to the pitch you hear when two sound waves constructively

Irina18 [472]

Answer: D

Sound waves with higher amplitudes sound louder than sound waves with lower amplitudes. Constructive interference will make a sound louder while destructive interference will make a sound quieter. Two waves that add together may have different frequencies.

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3 years ago

Read 2 more answers

What inequality is shown by the graph?

Gwar [14]

Step-by-step explanation:

2x - 10y > -20

=> x - 5y > -10

or x - 5y +10 > 0

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3 years ago

3.While measuring the length of a metal rod, the reading of the scale at one end is 2.5 cm and at the other end is 65.9 cm. What

Stels [109]

Answer:

33.7cm-8.0 cm are the the answer of the question

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3 years ago

A cash register contains 5 $10 bills and 3 $5 bills. you randomly pick 4 bills.

kobusy [5.1K]

a. The probability of picking exactly two $10 bills is $\frac{3}{7}$

b. The probability of picking at most one $5 bill is $\frac{1}{2}$

Explanation

Number of $10 bills $= 5$

and number of $5 bills $= 3$

Total number of bills= 5+3 = 8. You need to randomly pick 4 bills, so the total possible outcome $= ^8C^4$

a.

For getting exactly two $10 bills, you need to pick two $10 bills and two $5 bills. That means we will pick two $10 bill from 5 bills and two $5 bills from 3 bills.

So, the probability $=\frac{(^5C^2)*(^3C^2)}{^8C^4} =\frac{10*3}{70}=\frac{30}{70}=\frac{3}{7}$

b.

For getting at most one $5 bill, you need to pick either zero or one $5 bill.

If you pick zero $5 bill, that means there are four $10 bills

and if you pick one $5 bill, that means there are three $10 bills.

So, the probability $=\frac{(^3C^0*^5C^4)+(^3C^1*^5C^3)}{^8C^4}=\frac{(1*5)+(3*10)}{70}=\frac{5+30}{70}=\frac{35}{70}=\frac{1}{2}$

3 0

4 years ago

The angles of elevation of an airplane between two observation points, A and B, are 30 ° and 45 ° respectively. If the vertical

Serjik [45]

Answer:

xA = 10 km

xB = 7.071km

Step-by-step explanation:

A/Q

p=5km

For point A

∅ = 30°

sin ∅ = p/h

sin 30° = 5/h

1/2 = 5/h

h = 5×2

h=10km

For point B

sin ∅ = p/h

sin 45° = 5/x

1/√2 = 5/x

x = 5 × √2

x = 7.071 km

.: Points A and B are 10 km and 7.071 km away from the airplane.

4 0

3 years ago