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Maslowich
3 years ago
11

The Gomez family ordered $39.50 worth of

Mathematics
1 answer:
V125BC [204]3 years ago
4 0

Step-by-step explanation:

To find the cost of the tip, we need to find 120% of 39.50.

120% = 100% (order) + 20% (tip)

Let's use fractions. 39.50 can be put over 1, and 120 can be put over 100.

<u>Equation:</u>

<u />\frac{39.50}{1} \times \frac{120}{100} =?

<u>Multiply:</u>

<u />\frac{39.50}{1} \times \frac{120}{100} =\frac{4740}{100}

<u>Divide 4740 and 100 by </u><u>100</u><u>:</u>

<u />\frac{4740 \div 100}{100 \div 100} = \frac{47.4}{1}

The total cost of the food is $47.40.

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the number of diagonals that can be drawn in a opolygon of n sides is 1/2n(n-1)-n. If 230 diagonsaals can be drawn how many side
Vitek1552 [10]

Answer:

n = 20

Step-by-step explanation:

The number of diagonal that can be drawn in a polygon of n sides is given by :

D=\dfrac{n(n-3)}{2}

If the number of diagonals are 230, then put D = 230 in above formula. So,

230=\dfrac{n(n-3)}{2}\\\\460=n^2-3n\\\\n^2-3n-460=0

It is a quadratic equation, the value of n is equal to 20.

It means that for 230 diagonal, there are 20 sides of the polygon.

7 0
4 years ago
Find the area of a square<br> with the 685 width and 685 length​
ELEN [110]

Answer:

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Step-by-step explanation:

685² = 469,225

I hope this helps!

4 0
2 years ago
Mathsgenie.co.uk
ioda

Answer:

180

Step-by-step explanation:

For each boy you choose, you choose one of the 15 girls.

This is the counting principle.

12 * 15 = 180

Answer: 180

6 0
3 years ago
At the beach 29% of people have red towels and 18% have white towels if the rest have blue ,what percentage of the people at the
Vikki [24]
The percent of people with blue towels would be the remaining percent when you add the red and wight towels together.
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6 0
4 years ago
What is 278 minus 149
Basile [38]

Answer:

129

Step-by-step explanation:

278 - 149 = 129

5 0
3 years ago
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