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4 years ago

How do equations help us in the real-world?

2 answers:

6 0

Equations can help us a lot in the real world they can help you when you are buying something in bulk to see how long it will last when buying an online program like Netflix or paying your rent ect. there are a lot of different ways we use equations in the world there are to many to even name

julia-pushkina [17]4 years ago

3 0

Equations are used all the time in the real world whether you realize it or not. Equations in real life can be used to calculate budgeting, rates, costs, and can help you make predictions. This is very important if you a working or studying in a business environment, or you can use it if you're just going to the store to find the best deal.

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There is money to send four of nine city council members to a conference in Honolulu. All want to go, so they decide to choose t

FrozenT [24]

Answer:

126

Step-by-step explanation:

There are 9 city council members.

We have to choose 4 of them.

We have to use the combination as :

$^9C_4$

where, 9 is the population size

4 is the sample size.

Therefore, the total number of possible samples without replacement is given as :

$^9C_4=\frac{9!}{4!(9-4)!}$

$=\frac{9!}{5! \ 4!}$

$=\frac{9 \times 8 \times 7 \times 6}{4 \times 3 \times 2 \times 1}$

= 126

7 0

3 years ago

There are 100 cents in a dollar. what fraction of a dollar is 17 cents

7nadin3 [17]

The fraction would be 17/100

4 0

4 years ago

Read 2 more answers

Greg had $17 more than Fred, and together they had just enough money to by their mom a present that costs $85. How much money di

babunello [35]

Define x:

Let Fred had x dollar.

Fred = x
Greg = x + 17

Solve x :

x + x + 17 = 85
2x + 17 = 85
2x = 68
x = 34

Find the amount each of them had:

Fred = x = $34
Greg = x + 17 = 34 + 17 = $51

Answer: Greg had $51

3 0

3 years ago

Read 2 more answers

If the diameter of circle a measures half of the diameter of circle b, then the area of circle b is how many times the area of c

Eduardwww [97]

Circle b:

Diameter = x

Radius = $\frac{x}{2}$

Area = $\pi r^{2} = \pi ( \frac{x}{2} )^{2} = \frac{ \pi x^{2} }{4}$

Circle a:

Diameter = $\frac{x}{2}$

Radius = $\frac{x}{2} * \frac{1}{2} = \frac{x}{4}$

Area = $\pi r^{2} = \pi ( \frac{x}{4} )^{2} = \frac{ \pi x^{2} }{16}$

Thus,

Area of circle b to area of circle a

= $\frac{ \pi x^{2} }{4}$ ÷ $\frac{ \pi x^{2} }{16}$

= $\frac{ \pi x^{2} }{4}$ × $\frac{ 16 }{\pi x^{2}}$

= 4

Hence, the area of circle b is 4 times the area of circle a.

5 0

3 years ago

8. What is the slope of the line that goes through (8,8) and (4, 6)? -1/2 1/2 -2 2

k0ka [10]

Answer:

Step-by-step explanation:

Slope is the change in y over the change in x.

m = (8 - 6) / (8 - 4) = 2/4 = 1/2

6 0

3 years ago

Read 2 more answers