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Gennadij [26K]
2 years ago
7

The Hoffman family has bought one pizza on Friday night every week for the last 10 years. How many pizzas have they bought on Fr

iday nights? Enter your answer in the box.
Mathematics
1 answer:
prohojiy [21]2 years ago
7 0

Answer:

520 pizzas

Step-by-step explanation:

1 year = 52 weeks

Meaning the number of Fridays in a week = 52 Fridays

We are told that: The Hoffman family has bought one pizza on Friday night every week for the last 10 years.

Hence, the number of pizzas they bought in 1 year

= 52 Friday × 1 pizza

= 52 pizzas

For the last 10 years

= 52 pizzas × 10

= 520 pizzas

Hence, they have bought 520 pizzas in the last 10 years

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The current population of a threatened animal species is 1.2 million, but it is declining with a half-life of 20 years. How many
Allisa [31]
Rate:\frac{1,200,000}{20}
Unit\ Rate:\frac{60,000}{2} = 30,000

25\ Years:750,000
55\ Years:1,650,000

6 0
2 years ago
The sum of three consecutive odd integers is − 87 . find the numbers.
DIA [1.3K]
Three consecutive odd integers are n, n+2 and n+4

n + n+2 + n+4 = -87
3n + 6 = -87
3n = -87 - 6
3n = -93
n = -93/3
n = -31

n+2 = -31 + 2 = -29
n+4 = -31 + 4 = -27

The numbers are -31, -29 and -27
5 0
3 years ago
Thickness measurements of ancient prehistoric Native American pot shards discovered in a Hopi village are approximately normally
mariarad [96]

Answer:

a) 0.1587 (or 15.87%)

b) 0.0478 (or 4.78%)

c) 0.7935 (or 79.35%)

Step-by-step explanation:

Find the following probabilities:

(a) the thickness is less than 3.0 mm

We need to find the area under the Normal curve with a mean of 4.5 mm and a standard deviation of 1.5 mm to the left of 3 mm

<h3>(See picture 1 attached) </h3>

We can do that with the help of a calculator or a spreadsheet.

<em>In Excel use </em>

<em>NORMDIST(3,4.5,1.5,1) </em>

<em>In OpenOffice Calc use  </em>

<em>NORMDIST(3;4.5;1.5;1) </em>

and we get the value 0.1587 (or 15.87%)

(b) the thickness is more than 7.0 mm

Now we need the area to the right of 7 (1 - the area to the left of 7)

<h3>(See picture 2 attached) </h3>

<em>In Excel use </em>

<em>1-NORMDIST(7,4.5,1.5,1)  </em>

<em>In OpenOffice Calc use  </em>

<em>1-NORMDIST(7;4.5;1.5;1) </em>

and we get the value 0.0478 (or 4.78%)

(c) the thickness is between 3.0 mm and 7.0 mm

We are looking for the area between 3 and 7

<h3>(See Picture 3) </h3>

Since the area under the Normal equals 1, we have

Area to the left of 3 + Area between 3 and 7 + Area to the right of 7 = 1

Hence,  

0.1587 +  Area between 3 and 7 + 0.0478 = 1

and

Area between 3 and 7 = 1 - 0.1587 - 0.0478 = 0.7935 (or 79.35%)

4 0
3 years ago
Read 2 more answers
Plz help me get the answer ASAP
Dimas [21]

9b^3 -11 -10b^3

combine like terms

9b^3 -10b^3 -11

-b^3 -11

8 0
3 years ago
Read 2 more answers
3x - 9 = (-18)<br> Please help step by step please
GarryVolchara [31]

Answer: x = -3

Step-by-step explanation:

3x - 9 = -18

1. Add 9 to each side.

3x-9=-18

   +9  +9

3x=-9

2. Divide by 3.

3x/3 = -9/3

You are done.

x = -3

5 0
2 years ago
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