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Oduvanchick [21]
3 years ago
5

EXPERTS WHERE YALL AT?

Mathematics
2 answers:
Troyanec [42]3 years ago
6 0

Answer:

Substitute each of the values into the expression.

1. 7(7)-3(4)+8-4

  49-12+8-4

  41

2. 6(5)-10/5

   30-2

   28

3. 3(1)^2+2^3

   3(1)+8

   11

4. 5(3)^2

   5(9)

   45

:)

Studentka2010 [4]3 years ago
5 0

Step-by-step explanation:

1.)

7(7)-3(4)+8-4

49-12+8-4

37+4

41

2.)

6(5)-10/5

30-2

28

3.)

3(1)^2+2^3

3+8

11

4.)

5(3)^2

45

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Harvey the hamster can run 3 and 1/6 km in 1/4 of an hour. What is his average speed in kilometers per hour?
liubo4ka [24]
<h3>Answer:  12 & 2/3 km per hour</h3>

In decimal form, this is approximately 12.667 km per hour.

As an improper fraction, 12 & 2/3 = 38/3

==================================================

Explanation:

Let's use this formula

a & b/c = (a*c+b)/c

to convert the given mixed number to an improper fraction.

3 & 1/6 = (3*6+1)/6

3 & 1/6 = 19/6

The mixed number 3 & 1/6 is the same as the improper fraction 19/6

The hamster runs 19/6 km in 1/4 of an hour.

We can express that as the ratio

19/6 km : 1/4 hr

Multiply both parts by 4 so that the "1/4 hr" turns into "1 hr"

19/6 km : 1/4 hr

4*19/6 km : 4*1/4 hr

76/6 km : 1 hr

38/3 km : 1 hr

Harvey runs 38/3 km in 1 hour

Let's convert that to a mixed number

38/3 leads to a decimal, but 36/3 leads to a whole number

So,

38/3 = (36+2)/3

38/3 = 36/3 + 2/3

38/3 = 12 + 2/3

38/3 = 12 & 2/3

You can use your calculator to note that 38/3 = 12.667 approximately, which is also the value of 12 & 2/3, since 2/3 = 0.667 approximately. This helps confirm we did the conversion correctly.

6 0
3 years ago
Expand the expression 3.5(-3n + 4)
lakkis [162]

Answer:

Step-by-step explanation:

3.5(-3n+4)

=3.5*-3n+3.5*4

=-10.5n+14

3 0
3 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
How to write 2/5 as a decimal
igor_vitrenko [27]
I think the answer will be 2.5
6 0
4 years ago
Read 2 more answers
On the first
liubo4ka [24]

Answer:

0.93

Step-by-step explanation:

u have to add them all and divide by 12. then u add all of them but the outlier and divide by 11. then u subtract.

4 0
3 years ago
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