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In-s [12.5K]
3 years ago
14

The silver town people went to a fancy restaurant after the big event Grammy gave the sever a 15$ tip if she was 20% cost of din

ner how much was dinner ?? Please fast help
Mathematics
2 answers:
pochemuha3 years ago
5 0
The cost of the dinner was $75
frez [133]3 years ago
5 0
Okay, the only data in this you need to know is 15 = \frac{20}{100}x, where x is the total cost of dinner. 
Multiply both sides by the reciprocal of the fraction on the right to find the solution. Therefore x = \frac{1500}{20} =  75

$75
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40/100 in simplist form
vovangra [49]
40/100 in the simplest form is 0.4.

Math:
Think about it this way.
4/10 is 0.4 because 4 into 10 goes into 10 4 times, since you need to make it a decimal.
7 0
3 years ago
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In 2000 pizza costs 7.50 and in 2015 it costs 9.00 what is the percentage of change in the cost of the pizza
padilas [110]
Percentage change = difference/original x 100

(9.00-7.50)/7.50 x 100 = 2.50/7.50 x 100
= 1/3 x 100
= 33.3% increase
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3 years ago
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Answer:

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it satisfy the equation

7 0
2 years ago
What is the largest rectangular area that can be enclosed with 400 feet of fencing?
jek_recluse [69]
Let the length = x
2 lengths are 2x.
Then you have 400 - 2x for both widths, so the width is 200 - x.
The are if the rectangle is

y = x(200 - x)

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y = -x^2 + 200x

Take the first derivative ans set equal to zero to find a maximum value.

y' = -2x + 200

-2x + 200 = 0

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3 0
4 years ago
Planet Q Is 3.6 x 10^6km
11Alexandr11 [23.1K]

Answer:

1.64×10⁷ km

Step-by-step explanation:

We know this is a triangle rectangle, so we apply the Pythagorean Theorem

QR=sqrt(PR²+PQ²)

Solving it, we will encounter in

sqrt(2.56×10¹⁴+1.296×10¹³)

to solve it, we need to bring the two numbers at the same power of ten, so we move 1.296 of one place to the left:

sqrt(2.56×10¹⁴+0.1296×10¹⁴)

we can now add the two numbers:

sqrt(2.6896×10¹⁴)

to solve this, we do the square root of 2.6896 and divide 14 by two (the index of the root is 2, so for roots' properties we can divide 14 by 2 - the index)

which gives us

1.64×10⁷

5 0
3 years ago
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