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MArishka [77]
3 years ago
14

Whats the answers to 1 and 2 please help me. ​

Mathematics
1 answer:
uysha [10]3 years ago
5 0

Answer:

1.) -5 x 4 = -20

2.) 2 x ( - 8 ) = -16

Step-by-step explanation:

When you multiply negative numbers you do it as if it is addition, but you add a ( - ) to the answer. I hope what I have just explained in the "Step-by-step explanation:" helps you in future problems!! Good luck. :))

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If the number of Conference participants decreases by 20% compared to last year, there would be 1760 participants this year. If
Basile [38]
2,640 this year
2,112 last year

the 1760 is 20% less than - so 120% of 1760 is the previous year:
1760 * 1.2 = 2112

2112 increased by 25% is a total of 125%: 
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7 0
3 years ago
Read 2 more answers
7x10 to the 3rd power, write a pattern to find the value of the expression
myrzilka [38]
Scientific notation is used to express very large or very small values.
Numbers in scientific notation are written in the form of  
m × 10 to the power of n
For example:
500 is written as 5 x 10^2 where:
500 = 5 x 10 x 10

Now, let's consider 7 x 10^3:
Following the same procedure:
7 x 10^3 = 7 x 10 x 10 x 10 = 7000
The pattern can be written as:
7 x 10^3 = 7 x 10 x 10^2 
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6 0
3 years ago
1 poin
mars1129 [50]

Answer:

The building is 187.5 feet tall.

Step-by-step explanation:

A nearby person is 6 feet tall, and casts a shadow that is 8 feet long.

This means that the relation between the real height and the shadow is given by:

\frac{6}{8} = \frac{3}{4}

A tall building casts a shadow that is 250 feet long. How tall is the building?*

The real height is three fourths of the shadow. So

\frac{3}{4}*250 = 187.5

The building is 187.5 feet tall.

8 0
3 years ago
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