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grigory [225]
3 years ago
13

There are 99 males and 121 females participating in a marathon. What percent of the participants are female? Enter your answer i

n the box​
Mathematics
1 answer:
Hoochie [10]3 years ago
6 0

Answer:

55.

Step-by-step explanation:

121 is what percent of 220? = 55.

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Im almost done with my last few khan academy assignments but i think i frogot how to do this one
Strike441 [17]

Answer:

x--------------y

4--------------2

8--------------3

12-------------4

Step-by-step explanation:

y = 1/4x + 1

We substitute the values under x into the equation

Equation 1: y = 1/4(4) + 1

Equation 2: y = 1/4(8) + 1

Equation 3: y = 1/4 (12) + 1

Let's solve for equation 1:

Equation 1: y = 1/4(4) + 1

y = 1/4(4) + 1

Multiply number in parenthesis

y = 1/4 * 4/1 + 1

1/4 and 4/1 turn into 1

y = 1 + 1

Add 1 to 1

y = 2

Let's solve for equation 2:

y = 1/4(8) + 1

Multiply number in parenthesis

y = 1/4 * 8/1 + 1

1/4 and 8/1 turn into 2

y = 2 + 1

Add 2 to 1

y = 3

Let's solve for equation 3:

y = 1/4 (12) + 1

Multiply number in parenthesis

y = 1/4 * 12/1 + 1

1/4 and 12/1 turn into 3

y = 3 + 1

Add 3 to 1

y = 4

So the table of values would be:

x--------------y

4--------------2

8--------------3

12-------------4

look at the graph        

3 0
2 years ago
Use multiplication to find 5% of 180
jenyasd209 [6]
180×0.05=9
So 5% of 180 is 9
3 0
3 years ago
If the area of the circle is 206.1 m², find the radius. Round your answer to the nearest
densk [106]

Answer:

D) 8.1 m

Step-by-step explanation:

Area of a circle is pi r^2

5 0
3 years ago
X/-2 - 4 &lt; 2 <br> what is x?
Jet001 [13]

Answer:

x>-12

Step-by-step explanation:

x/-2-4<2

x/-2<2+4

x/-2<6

x<6(-2)

x<-12

x>-12

5 0
3 years ago
An oil refinery is located 1 km north of the north bank of a straight river that is 2 km wide. A pipeline is to be constructed f
djyliett [7]

Answer:

  7.86 km

Step-by-step explanation:

Let x represent the distance point P lies east of the refinery. (We assume this direction is downriver from the refinery.)

The cost of laying pipe to P from the refinery (in millions of $) will be ...

  0.5√(1² +x²)

The cost of laying pipe under the river from P to the storage facility will be ...

  1.0√(2² +(9-x)²) = √(85 -18x +x²)

We want to minimize the total cost c. That total cost is ...

  c = 0.5√(x² +1) +√(x² -18x +85)

The minimum value is best found using technology. (Differentiating c with respect to x results in a messy radical equation that has no algebraic solution.) A graphing calculator shows it to be at about x ≈ 7.86 km.

Point P should be located about 7.86 km downriver from the refinery.

8 0
3 years ago
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