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Tcecarenko [31]
3 years ago
15

-6(-7a+3b) a = 5 b = - 4

Mathematics
1 answer:
olchik [2.2K]3 years ago
5 0

Answer:

282

Step-by-step explanation:

-6(-7a+3b) a = 5 b = - 4

Evaluate by substituting the value of the variable.

-6(-7(5)+3(-4))

-6(-35-12)

-6(-47)=

282

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The double dot plot shows the number of points scored by Sam and Daniel in 15 games. What is the difference between their median
just olya [345]

Answer:

4.9

Step-by-step explanation:

7 0
2 years ago
A biker rode 45 miles in 180 minutes. At what speed (in miles per hour) was the biker travelling? A. 4 B. 17 C. 9 D. 12
Anastasy [175]

Answer:

v = 15 miles / hour

Step-by-step explanation:

Given:

Distance covered by biker = s=45 miles

time taken by him = t=180 minutes

TO Find:

speed in miles per hour = v = ?

Solution:

As it is given that the distance covered is 45 miles

and time taken by him is 180 minutes

as one hour have 60 minutes

so time taken by rider = t = 180 /60

                                          = 3 hours

this step is done because we have to find speed in miles per hour

Now

The formula for finding the distance is

distance = speed * time

or

s = v * t

we have to find v

so dividing both sides by t

\frac{s}{t} = \frac{v*t}{t}

it becomes

v = \frac{s}{t}

Putting the values

v = \frac{45}{3}

solving it gives

v = 15 miles / hour

which is the required speed

in the given options it is not available


5 0
3 years ago
Please help I really need help
Rasek [7]
This is not a risible  
7 0
3 years ago
What is the mean of this set {6,7,9,9,9}​
Naya [18.7K]

Answer:

8

Step-by-step explanation:

To find the mean, or average of a data set, add all the values together, then divide by the number of values.

The data set is: 6,7,9,9,9

1. Add all the values

Add 6,7,9,9 and 9

6+7+9+9+9

40

2. Divide by the number of values

Count how many numbers are in the data set. In this case, there are 5 numbers.

Divide 40 by 5.

40/5

8

The mean of the data set is 8.

7 0
3 years ago
Read 2 more answers
A friends is buying flowers for mother's day. Because it is her 38th birthday, your friend want to have 38 of her favorite flowe
777dan777 [17]

Answer: She bought 28 daises and 10 Tulips.

Step-by-step explanation:

Let x represent the number of daises bought.

Let y represent the number of tulips bought.

Your friend want to have 38 of her favorite flowers. This means that

x + y = 38

Her favorite flowers are daisies at 1.50 each and tulips at 2.50 each if the total bill was 67, it means that

1.5x + 2.5y = 67 - - - - - - - - - - - - 1

Substituting x = 38 - y into equation 1, it becomes

1.5(38 - y) + 2.5y = 67

57 - 1.5y + 2.5y = 67

- 1.5y + 2.5y = 67 - 57

y = 10

x = 38 - y = 38 - 10

x = 28

7 0
3 years ago
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