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castortr0y [4]
4 years ago
12

How do you add/subtract in scientific notation? Answer in a sentence.

Mathematics
1 answer:
Anton [14]4 years ago
6 0

Answer:

With a scientific calculator

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The variable z is directly proportional to x, and inversely proportional to y. When x is 4 and y is 13, z has the value 1.230769
Talja [164]

Answer:

Step-by-step explanation:

1.2307692307692.

The first step is to find the proportionality constant.

The formula is

z = kx/y

1.2307692307692 = k * 4/13          Multiply both sides by 13

1.2307692307692 * 13 = 4k

16 = 4*k                                            Divide by 4

k = 16/4

k = 4

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

z = k*x/y

x = 9

y = 20

k = 4

z = 4 *9/20

z = 36/20

z = 1.8

7 0
3 years ago
Read 2 more answers
What is the greatest common factor of 60x4y7, 45x5y5, and 75x3y?
Burka [1]

Answer:

15x3y.

Step-by-step explanation:

.

5 0
3 years ago
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Please help I don’t know how to-
aivan3 [116]

Answer:

y is going back by 3's x is going back one

Step-by-step explanation:

3 0
3 years ago
How do solve this problem 2/3 (2/8 + 4/8) =
scoundrel [369]

Answer:

1/2

Step-by-step explanation:

2/3 (2/8 + 4/8) =

First simplify what is inside the parentheses

2/8+4/8 = 6/8

Replace with 6/8

2/3 (6/8) =

Then multiply

2*6 =12

3*8 = 24

12/24

Divide top and bottom by 12

1/2

6 0
3 years ago
Read 2 more answers
Let x1 = 12, y1 = 15, and y2 = 3. Let y vary inversely with x. Find x2.
Ostrovityanka [42]
We have that an inverse variation in a function is given by:
 y = k / x

 We must find the value of the constant k.
 To do this, we substitute the values of x1 = 12, y1 = 15.
 We have then:
 15 = k / 12

 Clearing k we have:
 k = (15) * (12)

k = 180
 Substituting the value of k we have that the inverse variation is:
 y = 180 / x

 For y2 = 3 we have:
 3 = 180 / x2

 Clearing x2 we have:
 x2 = 180/3
 x2 = 60
 Answer:
 
x2 = 60
3 0
3 years ago
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