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mart [117]
3 years ago
12

HELP ME WITH 6-10 PLS

Mathematics
1 answer:
adelina 88 [10]3 years ago
7 0

6. = 0.0000004834

7. = 0.0000506

8. = 0.00098

9. = 64580000

10. = 1398600000

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(a)A train completed a journey of 850 kilometres with an average speed of 80 km/hr.
Yanka [14]

Answer:

a. 850/85 = 10.625 hr or 10 hr 37 min 30 sec

b. 6:08 AM

C. Average time is (10.625 + 10.8)/2 = 10.7125

or 10 hour 42 min 45 sec

6 0
3 years ago
Orbital Toys sells two types of sets of magnetic spheres, silver and brass. The store owner, Lucy Ball, pays $8 and $16 for each
sdas [7]

Answer:

The maximum profit will be reached by buying 500 brass magnetic spheres and 1500 silver magnetic spheres.

Step-by-step explanation:

In order to solve this you need to create a system of equations, with two values that will create the answer we are looking for, the thing that we don't know here is how many of each are we buying so the number of silver magnetic spheres will be represented by "y" and the brass magnetic spheres will be represented by "x".

So we know that x+y=2000

That's our first equation, our second would be the expense, which would be

8x+16y=20,000

We now just solve for one of them

x=(2000-y)

8(2000-y)+16y=20,000

16,000-8y+16y=20,000

8y=4,000

y=500

So we know that the maximum profit will be reached by buying 500 brass magnetic spheres and 1500 silver magnetic spheres.

5 0
3 years ago
When the sum of a number and 3 is subtracted from 10 the result is 5. What is the integer
Rashid [163]

In algebraic terms this is:

10-(x+3)=5\\10-x-3=5\\10-x=5+3\\10-x=8\\-x=8-10\\-x=-2\\x=2

The integer is 2.

4 0
3 years ago
Simplify to create an equivalent expression: -2r + 7(-2n - 3)
Andrew [12]

Answer:

-14n - 2r - 21

Step-by-step explanation:

4 0
2 years ago
Does (1,-2) (2,1) (3,0) (4,2) represent a function Yes or No?
Artemon [7]

Answer:

no

Step-by-step explanation:

x= 1, 2, 3, 4

y= -2, 1, 0, 2

y is changing randomly you won't be able to tell what number is next

3 0
2 years ago
Read 2 more answers
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