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Dahasolnce [82]
4 years ago
14

A penny, nickel, and dime are all flipped once. What is the probability that at least one coin comes up heads?

Mathematics
1 answer:
Blizzard [7]4 years ago
6 0
B for sure but I don't know why just trust me.
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Solve for y, z, x or t: y+ y/a =b, if a≠−1
Vadim26 [7]

Answer:

  • y=ab/(a+1)

Explanation:

In this case, you need to solve for y in y + y/a = b, if s ≠ - 1.

This is how you do it step-by-step:

<u>1. Multiply all the equation by the common denominator</u>: a

y + y/a = b\\ \\ a(y + y/a = b)\\ \\ a(y + y/a) = ab

<u>2. Simplify</u>:

ay + ay/a = ab\\ \\ ay+y=ab

<u>3. Common factor:</u> y

y(a+1)=ab

<u>4. Divide both sides by a + 1</u>

y=ab/(a+1)

4 0
3 years ago
Write the equation of a line that passes through (-3/2, -5) and perpendicular to a line that contains (-1, -2) and (-2, -8).
liraira [26]

Answer:

find gradient/slope

-8-(-5) / -2-(-1) = -3/-1

= 3

y=3x+c

perpendicular line formula

m1(m2)= -1

(sub in the gradient before)

3(m2)= -1

m2= -1/3 ( perpendicular line gradient)

y=-1/3x+c

(sub in the coordinate)

-5=-1/3(-3/2)+c

-5=1/2+c

-11/2=c (y intercept)

answer: y= -1/3x - 11/2

3 0
3 years ago
Can someone help me solve this need help on this ASAP
Nezavi [6.7K]
<h3>Given : </h3>

  • Radius of circle = 7 inches

<h3>To Find : </h3>

  • Circumference of circle = ?

<h3>Solution :</h3>

We are given radius, r = 7 inches

We know that :

Circumference = 2πr

⟹ Circumference = 2π × 7 inches

⟹ Circumference = 14π inches

Hence, circumference of circle is 14π inches.

3 0
3 years ago
What two numbers whose sum is 31 and whose difference is 1
Vlad [161]
I f i am correct 15 and 16

cuz 15+16 = 31
but 16-15= 1
6 0
3 years ago
Is 7 a rational number​
shutvik [7]
Yes , seven is a rational number
6 0
4 years ago
Read 2 more answers
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