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raketka [301]
2 years ago
8

The probability of choosing a penny from the 1980s from the bag of pennies without looking is StartFraction 3 over 40 EndFractio

n. Which term best describes this probability? impossible unlikely likely certain
Mathematics
2 answers:
BARSIC [14]2 years ago
7 0

Answer:

Unlikely

Step-by-step explanation:

wolverine [178]2 years ago
4 0

Answer:

B.

Step-by-step explanation:

took test

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10. 2x + 7y = 1<br> 2x - 4y = 12<br> Solve for y
adoni [48]

Answer:

The solution for y = -1.

Step-by-step explanation:

Given:

2x\ +\ 7y\ =\ 1    ....(1)

2x\ -\ 4y\ =\ 12  ....(2)

So, to solve for y, first we solve for x in equation (2):

2x-4y=12

⇒2x=12+4y

Dividing both sides by 2,

⇒x=6+2y            

Now, substituting the value of x  in equation (1):

2x+7y=1

⇒2(6+2y)+7y=1

⇒12+4y+7y=1

⇒12+11y=1

⇒11y=1-12

⇒11y=-11

Dividing both sides by 11,

⇒y=-1

Therefore, the solution for y = -1.

7 0
3 years ago
What is the surface area of a sphere with a radius of 19 units?
almond37 [142]

Hope this helps. Please mark brainliest if it did

Answer: 4536.46

5 0
2 years ago
A rancher wants to fence in an area of 1500000 square feet in a rectangular field and then divide it in half with a fence down t
VLD [36.1K]

Answer:

6000 ft

Step-by-step explanation:

Let length of rectangular field=x

Breadth of rectangular field=y

Area of rectangular field=1500000 square ft

Area of rectangular field=l\times b

Area of rectangular field=x\time y

1500000=xy

y=\frac{1500000}{x}

Fencing used ,P(x)=x+x+y+y+y=2x+3y

Substitute the value of y

P(x)=2x+3(\frac{1500000}{x})

P(x)=2x+\frac{4500000}{x}

Differentiate w.r.t x

P'(x)=2-\frac{4500000}{x^2}

Using formula:\frac{dx^n}{dx}=nx^{n-1}

P'(x)=0

2-\frac{4500000}{x^2}=0

\frac{4500000}{x^2}=2

x^2=\frac{4500000}{2}=2250000

x=\sqrt{2250000}=1500

It is always positive because length is always positive.

Again differentiate w.r.t x

P''(x)=\frac{9000000}{x^3}

Substitute x=1500

P''(1500)=\frac{9000000}{(1500)^3}>0

Hence, fencing is minimum at x=1 500

Substitute x=1 500

y=\frac{1500000}{1500}=1000

Length of rectangular field=1500 ft

Breadth of rectangular field=1000 ft

Substitute the values

Shortest length of fence used=2(1500)+3(1000)=6000 ft

Hence, the shortest length of fence that the rancher can used=6000 ft

3 0
4 years ago
Need help please like now please
Kipish [7]
The answer would be D because 100 Centimeters equal 1 meter so therefore it would be 200 day's of knitting
3 0
3 years ago
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Please help me with the equation<br><br> 6+z/10= -2
oksian1 [2.3K]

Answer:

z = -26

Step-by-step explanation:

6+z/10= -2

6 + z = -2 (10)

z = -20 - 6

z = -26

7 0
3 years ago
Read 2 more answers
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