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malfutka [58]
3 years ago
12

The mean of eight numbers is 83. the mean of another four numbers is 14. find the mean of the combined set of numbers.

Mathematics
1 answer:
vladimir2022 [97]3 years ago
8 0
Total numbers =8+4=12
mean= \frac{83*8+14*4}{8+4}mean= \frac{664+56}{12} 
= \frac{720}{12} 
=60
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SOMEONE ANSWER PLEASE The trapezoid below is made up of a square and a triangle The total area of the trapezoid
vladimir2022 [97]

Solution:

<u>Note that:</u>

  • Area of trapezoid = Area of triangle + Area of square = 575 m²
  • Area of triangle = 32.5 m²
  • Area of square = s²

<u>Finding the area of the square:</u>

  • 32.5 + Area of square = 575 m²
  • => Area of square = 575 - 32.5
  • => Area of square = 542.5
  • => s² = 542.5
  • => s = √542.5 ≈ 23.29

The length of the square is 23.29 meters.

4 0
2 years ago
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Lol help What is 3.5 × 1.2 =
Aleks04 [339]

Answer:

4.2

Step-by-step explanation:

3.5 x 1.2 = 4.2

7 0
3 years ago
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Sample Response: First, I wrote each ratio as a fraction. Then I found a common denominator of 20. The fraction 4/10 is 8/20. Co
lesantik [10]

In the case above, the option that one need to include in your answer is to Find a common denominator.

<h3>What is Fraction in lowest terms?</h3>

When the numerator and denominator of a fraction are known to not have common factor other than 1, then a person can say that the fraction in its simple form or say its in its lowest term.

Since there is a common numerator and the common denominator will be between 10 and 20. Since 10 is less that than 20, the common denominator will be 20 as both can divide it.

Hence, In the case above, the option that one need to include in your answer is to Find a common denominator.

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8 0
2 years ago
I need to know the Salary and explain how you got it.
RideAnS [48]
WEEKLY Earning Full time = 40 h x $15 = $600/week
Over time = 3 h 25 min or 3h + 25/60 h
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TOTAL WEEKLY INCLUDING OVERTIME: = $715
TOTAL SEMI MONTHLY INCLUDING OVERTIME =$715 X2 = $1,430
BIWEEKLY = SEMI MONTHLY = $1,430
TOTAL MONTHLY INCLUDING OVERTIME =$715 x 4 = $2,860





8 0
3 years ago
Traveling with the current, a boat covers a distance 1.5 times greater than traveling against the current in the same amount of
jeka94
Let the speed of the current equal c
and the speed of the boat in still water equal b.

b + c = 1.5 (b - c)
b + c = 1.5b - 1.5c
0.5b = 2.5c
b = 5c

The speed of the current is 1.5 mph so
b = 5 * 1.5 = 7.5 mph
4 0
3 years ago
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